Core Calculators
Compound Interest Calculator
Calculate compound growth on savings and investments
Investment details
₹
%
yrs
Maturity amount
₹0
How compound interest works
Interest is earned on both principal and accumulated interest. More frequent compounding yields slightly higher returns.
A = P × (1 + r/n)n×t
Why use it
Detailed features
Flexible frequency
Monthly, quarterly or yearly.
Interest earned
See growth over principal.
Standard formula
Same as FD/compound math.
On the go
Also in the Toolance app.
Frequently asked questions
You earn or pay interest on the principal plus interest already added. Over time growth speeds up because each period builds on the last. FDs, mutual funds and long-term loans all involve compounding.
Bank FDs often compound quarterly. Savings accounts may compound daily or quarterly per bank policy. More frequent compounding slightly increases effective returns at the same stated rate.
Future value equals principal times one plus rate divided by compounding frequency, raised to power of frequency times years. Our calculator does this so you do not have to work it by hand.
Investing earlier gives compounding more time to work, even with smaller amounts. A one-time lump sum also grows, but regular SIPs spread risk and suit salaried investors.
Yes. On reducing balance loans you pay interest on outstanding principal, which falls each month. On delayed credit card bills, interest on interest can pile up quickly if you pay only the minimum.
For FDs, ask the bank for annual effective yield after compounding. The headline rate and effective return can differ when compounding is quarterly.
This shows math on the inputs you give. Real returns vary with taxes, fees and market risk. It is not personalised investment advice.
No. It runs free in your browser with unlimited tries and no account.