Free Online Calculators
These free online calculators cover every everyday computation: loan EMIs and compound interest, BMI and calorie needs, percentages and fractions, date differences and time zones, plus unit and currency conversions. Every calculator runs instantly in your browser with formulas shown, so you get the answer and understand it.
Financial Calculators
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EMI Calculator
Calculate monthly loan EMI with interest breakdown and amortization.
Compound Interest Calculator
See how your money grows with daily, monthly, or yearly compounding.
SIP Calculator
Project mutual fund SIP returns with monthly investment growth.
Loan Calculator
Work out payments, total interest and payoff time for any loan.
GST Calculator
Add or remove GST at 5%, 12%, 18% or 28% — inclusive & exclusive.
Salary Calculator
Convert salary between hourly, monthly and yearly pay instantly.
Profit Margin Calculator
Calculate gross margin, markup and profit from cost & revenue.
Simple Interest Calculator
Calculate interest on loans or deposits with the SI formula.
Health Calculators
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BMI Calculator
Check your Body Mass Index with metric or imperial units.
BMR Calculator
Find your Basal Metabolic Rate — calories burned at rest.
Calorie Calculator
Get daily calorie targets for weight loss, maintenance or gain.
Body Fat Calculator
Estimate body fat % using the US Navy tape-measure method.
Pregnancy Due Date Calculator
Estimate your due date from LMP or conception date.
Ideal Weight Calculator
Find your ideal weight range using 4 medical formulas.
Math Calculators
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Percentage Calculator
Solve any percentage problem — % of, % change, % difference.
Fraction Calculator
Add, subtract, multiply & divide fractions with simplified results.
Age Calculator
Find your exact age in years, months, days, hours & minutes.
GPA Calculator
Calculate your semester or cumulative GPA on a 4.0 scale.
Scientific Calculator
Full scientific calculator — trig, logs, powers, roots & memory.
Average Calculator
Get mean, median, mode, range & more from any list of numbers.
Square Root Calculator
Find square roots, cube roots and nth roots of any number.
Date & Time Calculators
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Date Difference Calculator
Count days, weeks, months & years between any two dates.
Days Until Calculator
Count down the days to any future date or event.
Working Days Calculator
Count business days between dates, excluding weekends & holidays.
Time Zone Converter
Convert times between world time zones instantly, DST-aware.
Conversion Calculators
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Unit Converter
Convert length, weight, area, volume, speed & more.
Currency Converter
Convert between 30+ currencies with daily exchange rates.
Temperature Converter
Convert Celsius, Fahrenheit & Kelvin with formulas shown.
Length Converter
Convert km, miles, metres, feet, inches & more instantly.
Weight Converter
Convert kg, pounds, ounces, grams, stones & tonnes.
Helpful guides
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Image compression can cut file sizes by 60–90% with zero visible difference — if you use the right quality settings and formats. Here's exactly how.
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EMI Calculator Explained: Formula, Examples & Money-Saving Tips
EMI looks like a magic number your bank hands you — but it comes from one formula you can verify yourself. Here it is, with worked examples and ways to pay less.