Compound Interest Calculator
Project how your savings or investments grow over time with compound interest. See contributions vs growth with a chart.
Final value
£106,639
£
£0£1m
£
£0£5,000
%
0%15%
years
1yr50yr
More frequent compounding = slightly higher returns. The difference is small at typical rates (~0.5% annually).
Final value
£106,639
After 10 years
Contributed
£70,000
Interest earned
£36,639
Interest as % of contributions
52%
Rule of 72
At 7% annual return, your money doubles every ~10 years. Over 10 years, that's roughly 0× doublings.
Growth over time
Total value
Your contributions
Interest earned
| Year | Interest | Balance |
|---|---|---|
| 0 | £0 | £10,000 |
| 1 | £919 | £16,919 |
| 2 | £2,339 | £24,339 |
| 3 | £4,294 | £32,294 |
| 4 | £6,825 | £40,825 |
| 5 | £9,973 | £49,973 |
| 6 | £13,782 | £59,782 |
| 7 | £18,299 | £70,299 |
| 8 | £23,578 | £81,578 |
| 9 | £29,671 | £93,671 |
| 10 | £36,639 | £106,639 |
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