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Simple Interest Calculator

USD
%
years
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What is Simple Interest?

Simple interest is interest calculated only on the principal amount, not on any previously earned interest. It's a straightforward method of calculating interest that's commonly used for short-term loans and some savings accounts.

Unlike compound interest, simple interest grows linearly over time, making it easier to calculate and understand.

Simple Interest Formula

I = P × r × t

  • I = Interest
  • P = Principal amount
  • r = Interest rate (as decimal)
  • t = Time in years

Simple vs Compound Interest

Simple interest is typically used for:

  • Short-term loans (car loans, personal loans)
  • Some savings accounts
  • Bonds with fixed interest payments
  • Situations where interest doesn't compound

For long-term investments and savings, compound interest usually provides better returns.

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