SumSmart is a set of free financial calculators for people in India. We built it because working out a loan EMI, a GST amount or which tax regime is cheaper should take seconds, not a spreadsheet or a sign-up form.
What you will find here
Calculators for loan EMIs, mutual fund SIPs, GST, income tax under the old and new regimes, fixed deposits and recurring deposits. Each one shows its result instantly and explains the formula behind it in plain language, along with answers to common questions.
How we keep the numbers right
- Formulas follow the standard methods used by Indian banks and tax rules, such as reducing-balance EMI and quarterly compounding for deposits.
- Tax slabs and GST rates are checked against current published rules, and each page shows when it was last reviewed.
- Calculations run entirely in your browser. What you type stays on your device.
Limits you should know about
SumSmart gives estimates. Real outcomes depend on your lender's terms, your exact income and deductions, market movements and changes in law. Please read our disclaimer and confirm important figures with your bank or a qualified professional.
Get in touch
Found a mistake, or want a calculator we do not have yet? Write to us through the contact page.