Interest Calculator

Calculate simple or compound interest on your investments.

What is an Interest Calculator? (Definition & Example)

Interest calculators help you quickly determine the interest earned or paid on a principal amount over a specific period at a given interest rate. This tool is useful for savings, loans, and understanding how interest impacts your finances.

  • Formula: Simple Interest = P × r × t
  • P: Principal (initial amount)
  • r: Annual interest rate (decimal)
  • t: Time (years)

For example, a $2,000 deposit at 3% annual interest for 4 years will earn a certain amount of interest. Use this Interest Calculator to estimate your earnings or costs and make informed financial decisions.

Keywords: interest calculator, simple interest calculator, interest earned, loan interest, savings interest, financial planning, interest formula, principal and interest.

Estimated Summary

Total Interest: $0.00

Total Value: $0.00


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