Are these calculators free to use?
Yes. The calculators on Internet Toolbox are free to use and do not require an account.
Loading your tools
Getting the page ready. This should only take a moment.
Loading your tools
Getting the page ready. This should only take a moment.
Tool collection
Work out money, taxes, loans and returns. Pick a tool and get straight to the task - no account, no complicated setup.
14
free tools available
Available now
Work out percentages, increases and decreases.
Free to useFind the sale price and your savings.
Free to useEstimate monthly loan payments, interest and total repayment.
Free to useAdd or remove GST and see the tax amount.
Free to useCalculate body mass index from height and weight.
Free to useEstimate SIP growth, returns and future value.
Free to useEstimate fixed deposit interest and maturity amount.
Free to useCalculate compound growth, interest and final amount.
Free to useCompare estimated income tax under the old and new regimes for FY 2026-27.
Free to useEstimate monthly in-hand salary from annual CTC.
Free to useEstimate PPF growth, contributions and maturity value.
Free to useEstimate HRA exemption and taxable HRA.
Free to useConvert currencies using current reference exchange rates.
Free to useCheck gold and silver reference values in INR by weight and purity.
Free to useQuick guide
Use these calculators for quick estimates involving percentages, loans, taxes, investments, salary and everyday money decisions. Enter the values you know, check the assumptions shown with the result, and use the estimate as a starting point rather than a substitute for an official statement or professional advice.
Yes. The calculators on Internet Toolbox are free to use and do not require an account.
Results are estimates based on the inputs and assumptions shown by each calculator. Important financial or tax figures should be checked against current official sources.
Simple by design
Every tool is designed to get you from question to result with as little friction as possible.