Finance tool

Annuity Calculator

Calculate fixed loan payments, total payment, and total interest.

How to use Annuity Calculator

An annuity loan uses the same payment amount each period, usually every month. Inside that fixed payment there are two parts: principal repayment and interest.

Basic idea

Payment = Principal x rate / (1 - (1 + rate)^-periods)

Why is the payment fixed?

The annuity formula spreads principal and interest across the loan term. Early payments usually contain more interest, while later payments contain more principal.

Related tools

• Loan Comparison CalculatorCompare two loan offers by monthly payment and total cost.
• Interest CalculatorCalculate simple or compound interest and future value.
• Gross Profit CalculatorCalculate gross profit and gross margin from revenue and cost.
• 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.