Free online tools
Calculators
BMI, loans, discounts, dates, percentages — fast answers with clear breakdowns, on any device, without digging through a spreadsheet.
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Calculators
BMI Calculator
Calculate Body Mass Index with category and healthy range.
Age Calculator
Calculate exact age in years, months and days.
Percentage Calculator
Calculate percentages, percent change and percent of a number.
Currency Converter
Convert between major world currencies.
EMI Calculator
Calculate monthly EMI for any loan amount, rate and tenure.
Loan Calculator
Calculate loan payments, interest and amortization.
Unit Converter
Convert length, weight, volume, speed and more.
Discount / VAT Calculator
Calculate sale prices, discounts, savings and VAT-inclusive amounts.
Date Difference Calculator
Calculate the difference between dates or add/subtract days.
Tip Calculator
Calculate tip amount and split the bill between people.
Profit Margin Calculator
Calculate profit margin, markup and selling price.
GPA Calculator
Calculate GPA from course grades and credit hours.
Time Calculator
Add, subtract or convert hours, minutes and seconds.
Temperature Converter
Convert between Celsius, Fahrenheit and Kelvin.
About
Why calculators exist
Everyday math shouldn't require a spreadsheet — percentages for shopping, EMI for a loan, days until a deadline, BMI for a health check. Get the number instantly with the working shown.
Each calculator displays its breakdown, so you can verify the answer instead of trusting a black box.
Which calculations matter most?
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Percentages & discounts — Know the real price before you buy — sale tags are designed to confuse.
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Loans & EMI — See what a loan actually costs monthly before you sign anything.
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Dates — Days between deadlines, ages, countdowns — planning needs exact numbers.
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Health — BMI and similar metrics give a quick baseline, not a diagnosis.
How it works
Three steps, zero friction
Pick a tool
Choose from the grid above — every tool opens instantly, no sign-up screen in the way.
→Drop or paste
Upload a file or paste your text. Everything is processed right in your browser tab.
→Copy or download
Get your result, copy it to the clipboard or download the file — done in seconds.
What you can do
Popular uses for Calculators
Money decisions
Loan EMIs, discounts and VAT — know the real number before you pay.
Health tracking
BMI and daily stats without downloading another fitness app.
Dates & planning
Count days between deadlines, ages, anniversaries and events.
Conversions
Percentages, units and currencies — homework to home renovation.
Common mistakes
- ✗Rounding intermediate numbers — let the calculator keep full precision.
- ✗Treating calculator output as financial or medical advice — verify important decisions with a professional.
- ✗Mixing units across fields and getting a confidently wrong answer.
Tips that actually help
- ✓Check the units each field expects — cm vs inches or % vs decimal changes everything.
- ✓Run a few "what if" scenarios — instant results make comparison free.
- ✓Copy the result instead of retyping it to avoid transcription errors.
FAQ
Calculators — questions, answered
Are the calculations accurate?+
Calculators use standard formulas and show the breakdown of each result, so you can verify the math rather than taking a number on faith.
Can I save or share a result?+
Results can be copied to your clipboard in one click. Nothing is saved on our side — there are no accounts.
Do currency rates update live?+
The currency converter uses configurable rates you can adjust. For time-sensitive financial decisions, confirm rates with your provider.
Is BMI accurate for everyone?+
It's a useful screening baseline, but it doesn't account for muscle mass, age or body composition — athletes often read as "overweight". Use it as a guide, not a diagnosis.
Which units do the calculators use?+
Each field is labelled — most support both metric and imperial. Double-check units before typing; a cm/inch mix-up is the most common cause of wrong answers.