Simple & Compound Interest Calculator
Enter the principal, annual rate and time period to see both simple interest (SI = PRT ÷ 100) and compound interest (A = P(1 + r/n)ⁿᵗ) side by side, with your choice of compounding frequency.
Compounding frequency (for compound interest)
FAQs
Why is compound interest higher than simple interest?
Simple interest is calculated only on the original principal every period. Compound interest is calculated on the principal plus all interest already added, so each period earns interest on a larger base — the more frequently it compounds, the bigger that effect.
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