Savings Calculators

Simple Interest Calculator

Quickly calculate the interest earned or paid on a principal amount. Discover your total balance using a straightforward simple interest formula without compounding.

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About this tool

Whether you are lending money to a friend, taking out a short-term personal loan, or exploring basic savings bonds, understanding how simple interest works is a fundamental financial skill. Unlike compound interest—which calculates interest on both the principal and previously accumulated interest—simple interest is calculated only on the original principal amount. This free Simple Interest Calculator makes the math effortless. By simply entering your initial principal amount, the annual interest rate, and the time period (in months or years), you can instantly see the exact amount of interest you will earn or owe, alongside your final total balance. Use this tool for straightforward financial planning, educational purposes, or whenever you need a quick, no-surprises calculation for non-compounding loans and investments.

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Simple Interest Calculator

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