How These Calculators Work
Every calculator on this site runs in your browser with JavaScript. The numbers you type are processed on your own device. They are not uploaded, stored or logged, and no outside service is used. Each tool shows the answer and then the working, so you can check the steps.
Money tools use standard formulas for interest, instalments and tax. Health tools use published equations. Home tools use common industry allowances. Results are estimates, so check important ones with a professional.
Which Calculator Should I Use?
- Loans and savings: try the loan EMI calculator, the compound interest calculator, the SIP calculator, the FD calculator and the savings goal calculator.
- Tax and prices: use the GST calculator, the VAT calculator, the discount calculator and the tip calculator.
- Business: see the profit margin calculator, the break-even calculator, the ROI calculator and the CAGR calculator.
- Health and fitness: use the BMI calculator, the BMR and TDEE calculator, the body fat calculator and the running pace calculator.
- Home projects: try the paint calculator, the tile calculator and the concrete calculator.
More free tools: math calculators, unit converters, date and time tools and color tools. For the maths behind interest, read the Wikipedia article on interest.