Everyday tool

Compound Interest Calculator

See how compound interest builds over time using a simple future value estimate.

Start tool ← Back to home View everyday calculators cluster

Instant useNo sign up, quick result.

Clear outputMade for fast practical checks.

Related next stepsJump to supporting tools after.

Calculator

Use the compound interest calculator

Calculate compound growth from a starting balance, rate and years.

Principal

Annual rate (%)

Years

Compounds per year

Result: waiting for input

Enter your values to see the result.

How it works

Formula

A = P(1 + r/n)^(nt)

Example

£5,000 at 5% for 10 years compounded monthly will end higher than the same money with simple interest.

Frequently asked questions

What is compound interest?

It is interest earned on both the original balance and past interest.

Can I add monthly deposits here?

Use the savings calculator for regular monthly contributions.

Related calculators

Explore related tools

Use the related tools below to compare scenarios, check supporting numbers or solve nearby tasks faster.

Tool guide

How to use the compound interest calculator

Calculate compound growth from a starting balance, rate and years. Use this page for a fast estimate, compare a few scenarios, and adjust the inputs until the result matches what you need to decide.

This tool also sits inside the CalcBeacon finance cluster. That makes it easier to find from category pages, related tools, and supporting guides when you want to compare options.

When it is usefulUse this tool when you want a fast estimate, want to compare options, or want a clearer answer before moving on.

Common mistakesCheck that your numbers use the same units, avoid leaving key fields blank, and test a second scenario so you can see how sensitive the final result is.

Next useful stepAfter using this page, compare the result with a related calculator or open the guide to check the number in context.

Related tools

Use these related tools to compare nearby calculations and move to the next step faster.