Free Online Calculators for Everyday Money and Maths

Work out a loan EMI, estimate SIP returns, add or remove GST, find an exact age or solve a percentage. Results update as you type.

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Loan EMI

EMI Calculator

Calculate monthly EMI, total interest and total payment for home, car and personal loans, with a yearly breakup table.

Mutual Funds

SIP Calculator

Estimate the future value of your monthly SIP with expected return, years and optional yearly step-up.

India GST

GST Calculator

Add GST to a price or remove GST from a GST-inclusive amount. Shows CGST, SGST, IGST and the final price.

Years, Months, Days

Age Calculator

Find your exact age in years, months and days from your date of birth, plus days left until your next birthday.

Percent & Discount

Percentage Calculator

Calculate X% of a number, what percent one number is of another, percentage change, and add or subtract a percentage.

About our Calculators

The EMI Calculator shows the monthly instalment, total interest and total payment for a home, car or personal loan, so you can compare tenures before you speak to a bank. The SIP Calculator estimates how a monthly investment could grow at an assumed return. These are estimates based on the numbers you enter, not a promise of actual returns.

The GST Calculator adds GST to a price or removes it from a GST-inclusive price for any rate you enter. The Age Calculator gives your exact age in years, months and days on any date, which helps with form cut-offs, and the Percentage Calculator covers the common cases such as what is X% of Y, percentage change, increase and decrease.

Frequently Asked Questions

Are the EMI and SIP results guaranteed?
No. They are mathematical estimates from the loan or investment details you enter. Actual EMI depends on the lender's terms and actual SIP returns depend on the market.
Is my financial information saved?
No. The calculations happen in your browser and the numbers you type are not sent to ToolKhoj or stored.
Can I use the GST calculator for any rate?
Yes. Enter the GST rate that applies to your goods or service, and choose whether to add GST to a base price or remove it from a final price.