This rule of 69 calculator (continuous doubling) reference table shows the time to double for a range of growth rate per period values. Every figure is computed with the same engine that powers our Rule of 69 Calculator (Continuous Doubling), so the numbers are exact.
| Growth rate per period | Time to double |
|---|---|
| 2% | 34.65 |
| 4% | 17.33 |
| 6% | 11.55 |
| 8% | 8.66 |
| 12% | 5.78 |
| 16% | 4.33 |
| 24% | 2.89 |
| 4% | 1.73 |
| 56% | 1.24 |
| 8% | 0.87 |
How to use this table
Find the row closest to your growth rate per period and read across to the time to double. For a value between two rows, the real figure sits between them — or enter your exact numbers in the Rule of 69 Calculator (Continuous Doubling) for a precise answer.
Need a value that is not in the table? — the Rule of 69 Calculator (Continuous Doubling) does it instantly, for free, with the formula and a worked example built in.
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