Finance tool

Interest Calculator

Calculate simple or compound interest and future value.

How to use Interest Calculator

Interest is the cost of borrowing money or the return earned from saving and investing. Simple interest is calculated only from the principal, while compound interest also earns interest on previous interest.

Basic idea

Simple interest = Principal x Rate x Time. Compound value = Principal x (1 + Rate)^Time.

What is the main difference between simple and compound interest?

Simple interest only uses the original principal. Compound interest grows from both principal and accumulated interest.

Related tools

• Annuity CalculatorCalculate fixed loan payments, total payment, and total interest.
• Gross Profit CalculatorCalculate gross profit and gross margin from revenue and cost.
• Commission CalculatorCalculate sales commission from sales value, rate, and bonus.
• Cost of Goods Sold CalculatorCalculate cost of goods sold for trading and retail businesses.
• Cost of Goods Manufactured CalculatorCalculate manufacturing cost, cost of goods manufactured, and cost per unit.
• Margin & Markup CalculatorCompare profit margin and markup from cost and selling price.