This rule of 72 reference table shows the years to double (rule of 72) for a range of annual return rate values. Every figure is computed with the same engine that powers our Rule of 72 Calculator, so the numbers are exact.
| Annual return rate | Years to double (Rule of 72) | Years to double (Rule of 70) | Years to triple (Rule of 114) |
|---|---|---|---|
| 2% | 36.0 | 35.0 | 57.0 |
| 4% | 18.0 | 17.5 | 28.5 |
| 6% | 12.0 | 11.7 | 19.0 |
| 8% | 9.0 | 8.8 | 14.3 |
| 12% | 6.0 | 5.8 | 9.5 |
| 16% | 4.5 | 4.4 | 7.1 |
| 24% | 3.0 | 2.9 | 4.8 |
| 4% | 1.8 | 1.8 | 2.9 |
| 56% | 1.3 | 1.3 | 2.0 |
| 8% | 0.9 | 0.9 | 1.4 |
How to use this table
Find the row closest to your annual return rate and read across to the years to double (rule of 72). For a value between two rows, the real figure sits between them — or enter your exact numbers in the Rule of 72 Calculator for a precise answer.
Need a value that is not in the table? — the Rule of 72 Calculator does it instantly, for free, with the formula and a worked example built in.
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