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A doubling time calculator uses the Rule of 72 (or exact calculation) to determine how long it takes for a quantity to double at a constant growth rate. At 6% annual growth, 72 ÷ 6 = 12 years to double. Applies to investments, population growth, bacterial growth, and any exponential process.

Водич корак по корак

1. 1Apply Rule of 70 or exact formula
2. 2Divide by growth rate
3. 3Calculate time to double

Worked Examples

Common Mistakes to Avoid

• ✕Not double-checking results
• ✕Ignoring edge cases

Frequently Asked Questions