Simple & Compound Interest Calculator
Calculator ToolsSimple & compound interest for FD, savings, loans
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History
All history →Simple & Compound Interest Calculator — at a glance
Compare simple and compound interest to see how your money grows.
How to use it — step by step
Principal, yearly rate and time. For compound interest also pick how often it compounds.
Enter your numbers
Fill in the fields — sensible example values are already filled in.
Pick your options
Choose any dropdowns or switches that apply to your case.
Calculate Interest
Press the button. The result is created instantly on your device.
Read the answer
The main answer is shown big at the top, with details below it.
Pro tips
Small things that make the result better.
Quick facts
Frequently Asked Questions
Simple vs compound interest?+
Simple interest is earned only on the original amount. Compound interest is earned on the amount plus past interest.
What is the compound interest formula?+
A = P × (1 + r/n)^(n×t).
Is the result exact for my FD?+
It is a close estimate. Banks may round or use slightly different day-count rules.
Is this tool really free?+
Yes — completely free, no signup, no watermark and no usage limit.