Free Online Calculators for Finance, Education, Health & Business
Simple, accurate, and fast calculators for every need. Choose from 124 specialized calculators across 9 major categories.
Featured Tools
EMI Calculator
Calculate Equated Monthly Installment (EMI) for home loans, car loans, and personal loans.
SIP Calculator
Calculate potential returns on your Systematic Investment Plan (SIP) investments.
GST Calculator
Calculate Goods and Services Tax (GST) easily for any price with custom tax brackets.
PPF Calculator
Calculate returns and maturity amount of Public Provident Fund investments.
Fixed Deposit (FD) Calculator
Estimate maturity returns on your Fixed Deposits at standard compounding intervals.
Recurring Deposit (RD) Calculator
Determine your maturity amount for recurring deposits with monthly investments.
NPS Calculator
Estimate pension amount and lump sum payout for National Pension Scheme accounts.
SWP Calculator
Calculate regular cash flows and remaining balance for Systematic Withdrawal Plans.
Lumpsum Calculator
Estimate mutual fund investment returns for one-time lumpsum investments.
Stock Average Calculator
Find average stock purchase price when buying shares in multiple tranches.
Simple & Compound Interest
Compare interest accumulations over time using simple and compound calculations.
Gratuity Calculator
Estimate the gratuity amount payable at the end of employment based on service period.
Step-Up SIP Calculator
Calculate potential returns with annual increments in your SIP investment value.
CAGR Calculator
Determine the Compound Annual Growth Rate (CAGR) of investments over periods.
Inflation Calculator
Calculate buying power degradation or purchasing adjustments due to inflation rates.
Retirement Calculator
Plan your retirement corpus, expected monthly expenses, and financial independence.
Mutual Fund Returns Calculator
Calculate total returns and absolute gains of mutual fund investments.
Home Loan Calculator
Plan home loan EMI, down payments, and amortization schedule with visual charts.
Car Loan Calculator
Determine monthly payments, total interest, and schedule for vehicle financing.
Personal Loan Calculator
Calculate EMI, overall interest cost, and payoff periods for unsecured personal loans.
Education Loan Calculator
Calculate study loan repayment schedules, moratorium periods, and tax exemptions.
Credit Card EMI Calculator
Understand the actual cost of turning credit card purchases into monthly EMIs.
Loan Eligibility Calculator
Estimate maximum loan amount you can secure based on income and existing liabilities.
Loan Against Property Calculator
Calculate EMI and loan options for securing funding against residential or commercial properties.
Net Worth Calculator
Calculate your personal net worth by listing all financial assets and liabilities.
Savings Goal Calculator
Determine required periodic savings to hit a target nest egg or purchase value.
Investment Return Calculator
Calculate compound annual returns, absolute profits, and multipliers on any investment.
Margin Calculator
Calculate stock trading margins, required leverage levels, or business gross margins.
Break-even Calculator
Find the sales volumes or values required to cover fixed and variable business costs.
CGPA Calculator
Calculate Cumulative Grade Point Average (CGPA) from semester-wise scores.
CGPA to Percentage Calculator
Convert CGPA scores directly to equivalent percentages based on board rules.
Percentage Calculator
Calculate percentage values, percentage changes, increments, and decrements easily.
Average Calculator
Find the arithmetic mean of a set of numbers quickly.
Attendance Calculator
Determine target attendance percentages and track bunk/present count plans.
GPA Calculator
Calculate your semester or term GPA based on course grades and credit weights.
Grade Calculator
Determine what exam score is required to achieve a target letter grade in a class.
Marks Percentage Calculator
Determine the percentage grade you received in a test based on total and obtained marks.
Scientific Calculator
A fully-featured scientific calculator with trigonometric, logarithmic, and exponent functions.
Graphing Calculator
Plot, analyze, and render mathematical function graphs dynamically on an interactive coordinate plane.
Fraction Calculator
Add, subtract, multiply, and divide fractions, and simplify results.
Algebra Calculator
Solve quadratic equations, system of linear equations, and expand algebraic expressions.
Matrix Calculator
Add, multiply, transpose, and find the determinant or inverse of matrices.
Probability Calculator
Determine single event, multi-event, union, intersection, and conditional probabilities.
Statistics Calculator
Generate descriptive statistics for datasets: variance, standard deviation, and ranges.
Mean, Median, Mode Calculator
Identify the central values in numerical datasets: mean, median, and mode values.
Standard Deviation Calculator
Calculate sample and population standard deviation along with variance data.
Ratio Calculator
Simplify ratios, scale ratios up/down, or divide numbers into custom ratios.
Decimal to Fraction Converter
Convert repeating or terminating decimal numbers to their simplified fraction versions.
LCM Calculator
Find the Least Common Multiple (LCM) for multiple integers in one step.
HCF & GCD Calculator
Find the Highest Common Factor (HCF) and Greatest Common Divisor (GCD) for numbers.
Prime Number Checker
Check if a number is prime, and find all prime factors of that number.
Square Root Calculator
Determine the square root, cube root, and higher powers of positive numbers.
Age Calculator
Calculate your exact age in years, months, days, hours, and minutes from your birthday.
Date Calculator
Add or subtract days, weeks, months, or years from a reference date.
Time Calculator
Add, subtract, or convert different durations of time (hours, minutes, seconds).
Age Difference Calculator
Calculate the exact age difference between two individuals in years, months, and days.
Calendar Generator
Generate dynamic calendars for any month and year with marked holidays.
Days Between Dates
Determine the exact count of days, weeks, and months between two selected calendar dates.
Working Days Calculator
Calculate work days or business days between dates, excluding weekends and customs.
Business Days Calculator
Add business days to a start date, skipping weekends and selected holidays.
Countdown Generator
Set custom countdown timelines for events, launches, or personal milestones.
Anniversary Calculator
Calculate your upcoming wedding, work, or custom relationship anniversary dates.
Due Date Calculator
Find expected baby due dates based on Last Menstrual Period (LMP) or IVF transfers.
Time Zone Converter
Convert meeting and call schedules across different global time zones (GMT, EST, IST, etc.).
Hours Calculator
Track daily timesheets, clock-in/clock-out hours, and unpaid break deductions.
BMI Calculator
Calculate Body Mass Index (BMI) for children and adults to evaluate healthy weight.
BMR Calculator
Calculate Basal Metabolic Rate (BMR) to discover daily baseline calorie burn.
Calorie Calculator
Estimate daily calorie intake required to maintain, lose, or gain body weight.
Body Fat Calculator
Estimate body fat percentage using standard US Navy tape measurement formulas.
Ideal Weight Calculator
Determine your ideal body weight range based on height, gender, and frame sizes.
Water Intake Calculator
Calculate recommended daily water consumption volume based on weight and activity level.
Pregnancy Calculator
Track pregnancy week-by-week, gestational age, and upcoming milestone dates.
Ovulation Calculator
Predict peak fertility windows and ovulation dates to assist with family planning.
Target Heart Rate
Calculate target workout heart rate zones based on age and fitness capacity.
TDEE Calculator
Determine Total Daily Energy Expenditure (TDEE) based on activity and metabolic levels.
Macro Calculator
Divide target calories into ideal daily distributions of protein, carbs, and fats.
Lean Body Mass Calculator
Estimate your lean body mass and fat-free weight using James and Boer formulas.
Healthy Weight Range
Understand the minimum and maximum healthy weights for your heights.
Body Surface Area (BSA)
Calculate body surface area (BSA) for clinical dosing using Mosteller and DuBois equations.
Blood Volume Calculator
Estimate total circulating blood volume using Nadler's height and weight equations.
Blood Alcohol Calculator (BAC)
Estimate blood alcohol concentration (BAC) over time using Widmark's formula.
Profit Margin Calculator
Calculate cost, markup, selling prices, and net/gross profit margins for sales.
Sales Tax Calculator
Compute inclusive or exclusive sales taxes, VAT, and aggregate totals.
Revenue Calculator
Calculate total corporate revenue, average prices, and volume values.
ROI Calculator
Calculate Return on Investment (ROI) and annualized gains for business investments.
Invoice Calculator
Calculate invoice totals with line item pricing, item discounts, and tax rates.
Commission Calculator
Calculate commission payouts based on sales amounts and tiered rates.
Discount Calculator
Determine the sale price, dollar savings, and percentages saved on items.
Markup Calculator
Find retail selling prices, gross profits, and cost values using markup percentages.
Payroll Calculator
Estimate net pay after payroll deductions, taxes, and social security charges.
Salary Calculator
Convert hourly, weekly, monthly, and yearly salary values back and forth.
Overtime Calculator
Estimate overtime earnings based on regular hours, overtime rates, and hourly pay.
Length Converter
Convert meters, feet, inches, kilometers, miles, and yards instantly.
Weight & Mass Converter
Convert kilograms, pounds, ounces, grams, and stone weights.
Area Converter
Convert square meters, square feet, acres, hectares, and square kilometers.
Volume Converter
Convert liters, gallons, milliliters, cups, and fluid ounces.
Temperature Converter
Convert Celsius, Fahrenheit, and Kelvin temperature scales.
Speed Converter
Convert km/h, mph, m/s, and knots speed values.
Currency Converter
Compare conversion values across major global currencies.
Time Unit Converter
Convert seconds, minutes, hours, days, weeks, and years.
Energy Converter
Convert Joules, Calories, Kilowatt-hours (kWh), and BTUs.
Pressure Converter
Convert Pascals, Bar, PSI, and Atmospheres pressure metrics.
Fuel Efficiency Converter
Convert MPG (Miles per Gallon) and L/100km (Liters per 100km) metrics.
Data Storage Converter
Convert Bytes, Kilobytes, Megabytes, Gigabytes, and Terabytes.
Love Calculator
Check naming similarities and fun matching scores for compatibility.
FLAMES Game Calculator
Play the classic childhood relationship predictor FLAMES game.
Numerology Calculator
Calculate your life path number based on your birth date.
Name Numerology
Find your destiny number based on the Pythagorean alphabet values of your name.
Zodiac Calculator
Find your Western Sun Sign, Chinese zodiac animal, and element profiles.
Lucky Number Generator
Generate customized lucky numbers based on astrological or numerology profiles.
Birthday Facts
Find unique facts about the day you were born: weekday, birthstone, star, and historical event stats.
Friendship Quiz
Evaluate friendship match percentages using interactive fun questions.
Compatibility Index
Analyze zodiac compatibility scores between two partners.
Internet Speed Check Calculator
Determine actual network upload/download capacities in different units.
Download Time Calculator
Estimate time required to transfer a file given current download speeds.
Storage Capacity Planner
Compute total usable storage volume under standard RAID levels or disk groupings.
Screen Size & Area Calculator
Find screen height, width, and surface area given diagonal sizes and aspect ratios.
Aspect Ratio Calculator
Calculate proportional width and height values for images, videos, and layouts.
Bandwidth Calculator
Estimate corporate hosting bandwidth requirements based on traffic and page size.
Data Usage Estimator
Track daily internet usage estimates for streaming, gaming, and surfing.
Pixel Density (PPI) Calculator
Determine pixels per inch (PPI) of displays using resolution and diagonal sizes.
Battery Life Calculator
Estimate run times of battery packs based on device capacity and current draws.
Mortgage Calculator
Plan home loan mortgage costs, amortization schedules, property tax, and insurance integrations.
Rent vs Buy Calculator
Evaluate lifetime financial differences between renting a home versus purchasing property.
Property Value Estimator
Estimate investment values of rental properties based on capitalization rates and net operating income.
Rental Yield Calculator
Determine gross and net annual rental yields on real estate investments.
Stamp Duty Calculator
Estimate government stamp duties, registration fees, and transfer taxes on property transactions.
Home Affordability Calculator
Estimate maximum property purchase prices you can afford based on income and debts.
Hamster Age Calculator
Convert hamster age to equivalent human years.
Lawn Mowing Cost Calculator
Estimate costs for mowing lawn based on acreage and pricing.
Livestock Fence Calculator
Determine fence posts and wiring needed for livestock pens.
Goat Gestation Calculator
Estimate expected goat delivery dates from breeding schedules.
Dog Harness Size Calculator
Find the recommended harness size based on chest circumference.
Cattle per Acre Calculator
Compute stocking rates and cattle allowances per acre of land.
Tree Leaves Estimator
Estimate total number of leaves on a tree using crown height and spread.
Potting Soil Calculator
Calculate total volume of potting soil needed for planters.
Grain Bin Capacity Planner
Find bushel capacity of round and flat storage grain bins.
CO2 Grow Room Calculator
Determine carbon dioxide injection rates for plant grow rooms.
Tree Age Calculator
Estimate the age of a tree using trunk circumference and growth factors.
Grass Seed Calculator
Calculate lawn grass seed quantities for seeding or overseeding.
Plant Spacing Calculator
Plan layouts and spacing requirements for garden plants.
Corn Yield Estimator
Estimate corn yields per acre using kernel count and ear weight.
Grain Weight Conversion
Convert grain weights between bushels, tons, and pounds.
Shannon Diversity Index
Calculate ecological species diversity and species richness indices.
Drip Faucet Water Wastage
Calculate water wastage and costs from dripping faucets.
Solar Panel Capacity Planner
Estimate required solar panel counts and home wattage capacities.
P-Value Calculator
Compute p-values from t, z, chi-square, and F statistics.
Dice Average Calculator
Compute probability and expected average rolls of multiple dice.
Accuracy Calculator
Calculate classification model accuracy, sensitivity, and specificity.
Implied Probability Calculator
Convert betting odds into implied win percentages.
Bayes' Theorem Calculator
Compute conditional probabilities using Bayes theorem.
Joint Probability Calculator
Determine joint probability of independent or dependent events.
Odds Calculator
Convert between probabilities, fractional odds, and decimal odds.
ANOVA Calculator
Compute one-way Analysis of Variance (ANOVA) details.
Birth Year Calculator
Determine the year you were born based on age and date.
Tie Length Calculator
Find the optimal necktie length based on your height and tie knot.
30 Day Calculator
Add or subtract 30 days from a specific start date.
90 Day Calculator
Compute the date exactly 90 days from today or custom dates.
Time Until Calculator
Check years, months, and days remaining until target milestones.
180 Day Calculator
Find the calendar date that lies 180 days in the future or past.
100 Day Calculator
Add or subtract 100 days from target calendars.
120 Day Calculator
Determine target dates exactly 120 days from start.
60 Day Calculator
Calculate target dates 60 days in the past or future.
Years Between Two Dates
Count total calendar years, leap years, and months between dates.
45 Day Calculator
Add or subtract 45 days from target dates.
Audiobook Speed Calculator
Estimate listening times at custom narration speed multipliers.
Number of Days Calculator
Quickly count calendar days between two dates.
Hours to Days Converter
Convert time durations from hours to days.
Inches to Fraction Converter
Convert decimal inches to nearest fractional measurements.
Weeks to Years Converter
Convert weeks durations to calendar years.
Seconds to Hours Converter
Translate seconds into equivalent hours.
Days to Months Converter
Convert day durations to average months.
Number to Millions Converter
Convert large numbers to million, billion, or trillion representations.
Months to Years Converter
Convert calendar months to decimal years.
Days to Years Converter
Convert days count to equivalent calendar years.
Kilometers to Miles Converter
Convert distances from kilometers (km) to miles (mi).
ML to OZ Converter
Convert volumes between milliliters and fluid ounces.
Pounds to Ounces Converter
Convert weights between pounds (lbs) and ounces (oz).
ML to Cups Converter
Convert volume measurements from milliliters to cooking cups.
PSI to Inches of Water
Convert pressure values from PSI to inches of water column.
Grams to Ounces Converter
Convert masses between grams and dry ounces.
Detention Time Calculator
Compute hydraulic retention and detention times for tanks.
PPM to Molarity Converter
Convert chemical parts per million (PPM) concentrations to Molarity.
Mixing Ratio Calculator
Determine required volumes for dilution or product mixing ratios.
Water Hardness Calculator
Classify water hardness from calcium and magnesium concentrations.
Average Atomic Mass
Compute weighted average atomic mass based on isotope abundance.
Bond Order Calculator
Determine covalent bond order from bonding and antibonding electrons.
Mass Percent Calculator
Find mass percentage composition of solute in a solution.
pH Calculator
Solve pH and pOH values from hydrogen ion concentrations.
Henderson-Hasselbalch
Solve buffer solution pH using acid-dissociation constants.
Beer-Lambert Law Calculator
Compute chemical absorbance, path length, or molar attenuation.
Gibbs Free Energy Calculator
Solve free energy changes using enthalpy and entropy values.
Chemical Nomenclature
Translate molecular formulas to standard chemical names.
Arrhenius Equation Solver
Solve activation energy and reaction rate dependencies on temperature.
Rate Constant Calculator
Determine chemical reaction rate constants for first/second order.
Atomic Mass Calculator
Sum isotopic weights to find chemical formula weights.
SCFM Airflow Calculator
Convert ACFM to SCFM parameters for standard gas flows.
Earth Curvature Calculator
Estimate horizon drop distance due to Earth curvature.
Pipe Flow Rate Calculator
Calculate liquid flow velocities and volumes through pipes.
Wave Frequency Calculator
Solve wave frequency using wavelength and speed velocity.
Wavenumber Converter
Convert wave parameters between wavenumbers, wavelengths, and frequencies.
kVA Electrical Calculator
Convert between kVA, kilowatts, and phase currents.
Specific Heat Calculator
Determine thermal energy required to change temperatures.
Watt-hour (Wh) Calculator
Convert electrical charge capacity from Ah to Wh.
HP to Amps Calculator
Convert motor horsepower into electrical currents in amperes.
Power Factor Calculator
Compute power factors from real, reactive, and apparent power.
Water Density Calculator
Compute pure water density at specific temperature scales.
Power to Weight Ratio
Find performance horsepower to weight ratios for vehicles.
BTU to Tons HVAC Calculator
Convert cooling and heating capacities from BTUs to Tons.
Centrifuge Force (RCF)
Compute relative centrifugal force from RPM and rotor radius.
Contact Lens Vertex Power
Adjust glasses prescription power for contact lens vertex distances.
Angular Acceleration
Solve rotational accelerations from angular speeds and times.
Impulse & Momentum
Solve force collisions using impulse and momentum parameters.
Friction Force Calculator
Determine static and kinetic friction limits from normal force.
Free Fall Velocity Solver
Calculate final velocity and fall duration neglecting air friction.
Ballistic Coefficient
Compute bullet drag factors using weight and sectional density.
Projectile Motion Solver
Solve range, flight duration, and peak height coordinates.
Arrow Speed Calculator
Estimate bow and arrow velocities based on grain weights.
Momentum Calculator
Solve linear momentum using mass and velocity parameters.
Gambrel Roof Calculator
Plan framing lengths and angles for double-pitch gambrel rafters.
Concrete Block Calculator
Determine total masonry blocks and mortar bags for walls.
Material Tonnage Calculator
Estimate required gravel, asphalt, or dirt weight in tons.
Limestone Calculator
Calculate volumes and weights of crushed limestone for bases.
Roof Truss Calculator
Estimate rafter lengths, truss counts, and spacing specifications.
Baluster Spacing Calculator
Plan baluster gaps for stairway handrails and guardrails.
Sand Calculator
Compute weight and volume of sand required for sandbox bases.
Plywood Sheet Calculator
Calculate sheet counts for subflooring, siding, or roof sheathing.
Wall Stud Framing
Estimate wall stud counts, plates, and header materials.
Square Footage Calculator
Solve total floor surface areas for carpeting or tiling.
Board Foot Calculator
Calculate total board feet volume of timber and lumber products.
Rebar Calculator
Determine rebar reinforcement grid weights and lengths.
Gallons Per Minute (GPM)
Determine pipe flow rates in GPM from capacity volumes.
Roof Pitch Calculator
Convert roof angles to standard rise-over-run pitch ratios.
Square Feet to Cubic Yards
Convert floor areas at specified depths to cubic yards.
Marginal Cost Calculator
Calculate cost changes incurred by producing one additional unit.
Year Over Year (YoY) Growth
Determine annual percentage growth comparing current vs previous years.
Click-Through Rate (CTR)
Determine CTR percentages based on total clicks and impressions.
GMROI Calculator
Calculate Gross Margin Return on Investment for retail inventory.
Money per Hour Calculator
Translate monthly salaries or annual earnings to hourly wages.
Lemonade Stand Simulator
Determine product pricing, costs, and profits for micro-businesses.
Market Capitalization
Evaluate public company valuations from stock shares and pricing.
Absence Percentage
Determine employee absenteeism rates over designated shifts.
Full-time Equivalent (FTE)
Convert part-time shift hours to equivalent full-time workloads.
Buy vs Outsource Planner
Evaluate cost advantages of buying in-house versus outsourcing projects.
Cross-Sectional Area
Solve circular, rectangular, or triangular cross section areas.
Doubling Time Calculator
Find hours or years required to double sizes using growth rates.
Percent to Goal Calculator
Compute progress percentage relative to target goals.
Scientific Notation Converter
Convert decimal numbers to scientific exponential formats.
LU Decomposition Solver
Decompose a matrix into Lower and Upper triangular matrices.
Percent Error Calculator
Calculate percentage differences between experimental and true values.
Fraction Simplifier
Reduce complex fractions to their simplest fractional forms.
Equivalent Fractions Solver
Generate and verify equivalent fractions for input values.
Remainder Calculator
Solve long division quotient and remainder values.
Greatest Common Factor (GCF)
Identify the Greatest Common Factor (GCF) for multiple integers.
Percentage Point Calculator
Find differences between two percentage statistics.
Decimal to Percent Converter
Convert base-10 decimal scales to percentage scores.
Sum/Difference & Double Sum
Compute simple summation series and double sigma sums.
Basic Calculator
Solve simple math equations with an interactive basic desk calculator.
Average Percentage Calculator
Compute weight-adjusted average percentage groups.
Percentage Increase Calculator
Solve percentage increments and final escalated values.
Percentage of a Percentage
Solve compounding percentages of percentage scores.
Fuzzy Directory Search
Instantly lookup formulas and calculations across 124 specialized calculators.
Browse by Category
Financial & Investment
Manage your wealth, loans, investments, and taxes.
39 CalculatorsEducation & Math
Solve mathematical problems, calculate GPA, CGPA, and averages.
40 CalculatorsDate & Time
Calculate ages, date differences, business days, and time zones.
15 CalculatorsHealth & Fitness
Track BMI, calories, weight goals, and overall physical health.
16 CalculatorsBusiness & Productivity
Evaluate profit margins, ROI, markup, commission, and payroll.
11 CalculatorsUnit Converters
Convert between length, weight, area, volume, temperature, and speed.
26 CalculatorsLifestyle & Fun
Explore zodiac compatibility, friendship checks, and numerology.
9 CalculatorsTechnology
Check internet speeds, aspect ratios, screen sizes, and battery life.
9 CalculatorsReal Estate
Calculate mortgages, rental yields, stamp duty, and home affordability.
6 CalculatorsBiology
Calculate livestock needs, plant spacings, tree ages, and growth parameters.
15 CalculatorsEcology
Determine ecological diversity indexes, solar capacities, and drip water loss.
3 CalculatorsStatistics
Solve probability, Bayes' theorem, P-values, and statistical distributions.
8 CalculatorsEveryday Life
Calculate audiobook speeds, day offsets, birth years, and tie lengths.
13 CalculatorsChemistry
Solve molarity conversions, mixing ratios, pH levels, and chemical names.
15 CalculatorsPhysics
Solve curvature of the Earth, frequency ranges, specific heat, and pipe flow rates.
23 CalculatorsConstruction
Calculate concrete blocks, roof pitch framing, board feet, and sand tonnage.
15 Calculators