Are these calculators free to use?
Yes. The calculators on Internet Toolbox are free to use and do not require an account.
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Work out money, taxes, loans and returns. Pick a tool and get straight to the task. No account, no complicated setup.
14 free tools in this category
Work out percentages, increases and decreases.
Find the sale price and your savings.
Estimate monthly loan payments, interest and total repayment.
Add or remove GST and see the tax amount.
Calculate body mass index from height and weight.
Estimate SIP growth, returns and future value.
Estimate fixed deposit interest and maturity amount.
Calculate compound growth, interest and final amount.
Compare estimated income tax under the old and new regimes for FY 2026-27.
Estimate monthly in-hand salary from annual CTC.
Estimate PPF growth, contributions and maturity value.
Estimate HRA exemption and taxable HRA.
Convert currencies using current reference exchange rates.
Check gold and silver reference values in INR by weight and purity.
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.