Free Online Calculators

Quick, accurate answers for everyday maths: percentages, exact age, loan repayments, dates and unit conversions. Results update as you type and show the working.

7 free toolsNo sign-upNo watermarks

Which tool do I need?

All Calculators

Percentage Calculator

Percent of a number, percentage change, increase or decrease, and more, with the working shown.

Age Calculator

Exact age in years, months and days, plus total days and a next-birthday countdown.

Loan & EMI Calculator

Monthly payment, total interest and a full repayment schedule for any loan or mortgage.

Date Calculator

Days between two dates, working days, and adding or subtracting days, weeks or months.

Unit Converter

Convert length, weight, temperature, volume, area, speed, time and data units instantly.

GPA & CGPA Calculator

Work out your GPA and CGPA from grades and credits, and convert between CGPA and percentage.

BMI Calculator

Check your Body Mass Index in kg or lbs, your weight category and the healthy range for your height.

Working shown

See the formula behind each answer, not just a number.

Instant results

Answers update as you type, with nothing to submit.

Checked for accuracy

Edge cases like leap years and month ends are handled correctly.

Frequently asked questions

Are the calculators accurate?

Yes. They use standard formulas and handle tricky cases such as leap years, month ends and zero-interest loans. Loan results are estimates; your lender's quote is final.

Is my information saved?

No. Calculations happen in your browser and nothing is stored.

Can I get a calculator like this on my website?

Yes. Wasiq Khan builds custom calculators and quote tools for business websites that turn visitors into leads.

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