Interest calculator
Compare how simple and compound interest grow your money differently over time.
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SIMPLE INTEREST
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COMPOUND INTEREST
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Simple vs. compound growth
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How interest is calculated
Simple interest grows in a straight line on your original amount. Compound interest earns interest on interest, so it accelerates the longer you leave it invested.
Simple = P × r × t / 100 · Compound = P × (1 + r/100)t − P
Example: ₹1,00,000 at 8% for 10 years earns ₹80,000 simple interest, but ₹1,15,892 compound interest — nearly 45% more.
Tips to make compounding work for you
- Start investing early — time in the market matters more than the amount.
- Reinvest any interest or dividends rather than withdrawing them.
- Choose accounts or funds that compound more frequently when rates are similar.
- Avoid withdrawing early; it resets the compounding clock on that money.
Frequently asked questions
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