Free calculators and tools
8 tools, each with a written guide that explains the formula, a worked example and the limits of the answer. They run in your browser: no sign-up, nothing uploaded.
Finance
Compound Interest and SIP Calculator
Pick SIP or lumpsum, set an assumed return, and see the year-by-year growth, including what the money might be worth after inflation.
FinanceEMI Calculator
Enter the loan amount, interest rate and tenure to see your EMI, the year-wise or month-wise repayment table, and what a monthly prepayment saves.
FinanceGST Calculator
Add GST to a base price or work backwards from a GST-inclusive price, and see the tax split for intra-state or inter-state supply.
Health
Math
Age Calculator
Enter a date of birth and an "as on" date to get an exact age, total days lived and the days left to the next birthday.
MathPercentage Calculator
Five everyday percentage questions on one page. Each box updates as you type.