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Interest Calculator

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Calculate Interest
Compare simple and compound interest calculations for investments and loans
Interest Comparison
Simple vs Compound Interest Results

Enter values to calculate interest

Simple Interest

Simple interest is calculated only on the principal amount. The formula is:

SI = P × r × t
  • • P = Principal amount
  • • r = Annual interest rate
  • • t = Time in years
Compound Interest

Compound interest is calculated on principal plus accumulated interest. The formula is:

CI = P(1 + r/n)^(nt) - P
  • • P = Principal amount
  • • r = Annual interest rate
  • • n = Compounding frequency
  • • t = Time in years
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