Compound Interest Calculator
See how savings grow with compound interest.
Result
After 10 yearsExample
47,526.55
- Total put in
- 34,000.00
- Interest earned
- 13,526.55
- Yearly rate (APY)
- 5.116%
| Year | Put in so far | Interest so far | Balance |
|---|---|---|---|
| 1 | 12,400.00 | 567.39 | 12,967.39 |
| 2 | 14,800.00 | 1,286.60 | 16,086.60 |
| 3 | 17,200.00 | 2,165.39 | 19,365.39 |
| 4 | 19,600.00 | 3,211.93 | 22,811.93 |
| 5 | 22,000.00 | 4,434.80 | 26,434.80 |
| 6 | 24,400.00 | 5,843.03 | 30,243.03 |
| 7 | 26,800.00 | 7,446.09 | 34,246.09 |
| 8 | 29,200.00 | 9,253.96 | 38,453.96 |
| 9 | 31,600.00 | 11,277.11 | 42,877.11 |
| 10 | 34,000.00 | 13,526.55 | 47,526.55 |
Show stepsHide steps
- 5% a year is added monthly: 0.4167% each time, on the balance including earlier interest.
- Each monthly addition earns interest from the month it goes in.
- So 34,000.00 put in becomes 47,526.55 after 10 years.
Rates change; no taxes or fees.
An estimate, not financial advice.
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Questions
What is compound interest?
Interest that is added to the balance and then earns interest itself. 10,000 at 5% a year compounded yearly becomes 10,500 after a year and 11,025 after two.
Does compounding more often make much difference?
A little. 5% compounded monthly is an effective 5.116% a year; daily is 5.127%. The effective rate (APY) row shows it for your choice.
What is simple interest?
Interest paid on the starting amount only, never on earlier interest. Choose “None (simple interest)” under compounding to compare.
Is it free? Do I need an account?
It is free to use and there is nothing to sign up for. There are no watermarks and no daily limits.
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