The Compound Interest Calculator projects how an investment grows over time. Enter your initial principal, optional monthly contributions, annual interest rate, time period and compounding frequency to see the future value and the interest earned.
Harness the power of compounding
Compound interest earns interest on both your original money and the interest already accumulated, which is why investments grow faster over time. This calculator combines a lump-sum principal with optional recurring monthly contributions to model realistic savings and investment scenarios.
Adjust the compounding frequency — annually, quarterly, monthly or daily — to match your account and see how it affects growth.
What you will see
- Projected future value at the end of the term
- Total amount you contribute over time
- Interest earned on top of your contributions
Related searches
Recommended Math & Finance Calculators tools
Explore more free online tools related to Compound Interest Calculator.
Simple Interest Calculator
Calculate simple interest and the total amount from principal, rate and time — choose years or months for the period.
Tip Calculator
Calculate the tip and total bill, and split it evenly between any number of people — with handy tip percentage presets.
Discount Calculator
Calculate the sale price and amount saved from an original price and discount percentage, including stacked extra discounts.
Sales Tax / VAT Calculator
Add or remove sales tax or VAT from a price, showing the net amount, tax amount and gross total at any rate.
GST Calculator
Add or remove GST at any rate, with an automatic CGST and SGST split for intra-state supply. Quick presets for common slabs.
Salary / Hourly Wage Calculator
Convert an hourly wage into daily, weekly, monthly and annual salary based on your hours per week and weeks per year.