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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.
Related Financial Calculators
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