Finance calculators
Loans, EMI, SIP, interest, tax and ROI.
This is the largest category on Calcy, and deliberately so — loans, investments, interest, and tax each have their own specific formula, and mixing them up leads to wrong numbers. Every calculator below is a real financial calculation, not investment advice: each one clearly separates the math from any recommendation.
Broadly, the calculators split into three groups: borrowing (EMI, Loan), growing money (SIP, Compound Interest, Simple Interest, ROI, Inflation), and tax (GST, Income Tax, Sales Tax).
EMI Calculator
Free EMI Calculator. Calculate your monthly loan EMI, total interest, total repayment, and amortization schedule quickly and accurately.
SIP Calculator
Free SIP Calculator. Calculate monthly SIP returns, future investment value, total investment, and estimated wealth instantly.
Compound Interest Calculator
Free Compound Interest Calculator. Calculate compound interest, future value, investment growth, and returns with daily, monthly, or yearly compounding.
Simple Interest Calculator
Free Simple Interest Calculator. Calculate simple interest, principal, interest rate, total amount, and investment or loan returns quickly.
ROI Calculator
Free ROI Calculator. Calculate Return on Investment (ROI), investment gain, ROI percentage, and annualized return instantly.
GST Calculator
Free GST Calculator to add or remove GST from any amount instantly. Calculate GST at 5%, 12%, 18%, and 28% with accurate results.
Loan Calculator
Free Loan Calculator to estimate monthly loan payments, total interest, total repayment, and loan amortization for home, auto, and personal loans.
Income Tax Calculator (India)
Free Income Tax Calculator for India's new tax regime (FY 2025-26). Estimate your tax payable after standard deduction and Section 87A rebate.
Inflation Calculator
Free Inflation Calculator to see what today's money will cost in the future, and how much purchasing power it loses, at any inflation rate.
Sales Tax Calculator
Free Sales Tax Calculator to add or remove a flat-rate sales tax from any price — built for US-style single-rate sales tax, not VAT/GST slabs.
How to choose the right calculator
- Monthly payment on a home, personal, or auto loan → EMI Calculator
- Compare loan amount, interest rate, or repayment term generally → Loan Calculator
- Project a monthly mutual fund investment's future value → SIP Calculator
- Interest that compounds over time (savings, deposits) → Compound Interest Calculator
- Interest that doesn't compound (short-term loans) → Simple Interest Calculator
- Return on an investment as a percentage → ROI Calculator
- What today's money will cost in the future → Inflation Calculator
- Add or remove India's GST from a price → GST Calculator
- Estimate income tax under India's new tax regime → Income Tax Calculator (India)
- Add or remove a flat-rate sales tax (US-style) → Sales Tax Calculator
Frequently asked questions
They use the same underlying formula. EMI Calculator is framed specifically around a fixed monthly payment and its amortization; Loan Calculator is a more general view of the same numbers for comparing different loan scenarios.
GST Calculator is built for India's slab-based GST system (5/12/18/28%). Sales Tax Calculator is for a flat, single-rate sales tax like the state/local rates used in the US. Use whichever matches the tax system you're actually dealing with.
No — they're mathematical projections based on the rate you enter, not a promise of what an actual investment will return. Each calculator's page states this explicitly.
No — it's an estimate based on published slab rates, for planning purposes only. It doesn't file anything and isn't a substitute for a tax professional, especially for income near ₹50L+ or with capital gains involved.