Rule of 70 Calculator

Calculate doubling time using the Rule of 70 and exact logarithmic compounding. Project national output over 10 to 30 years.

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How to Use Economic Growth & Rule of 70 Calculator

  1. Enter Annual Growth Rate (g %).
  2. Enter Baseline GDP or Income.
  3. View exact doubling time in years and 10/20-year compound projections.

Power of Compounding in Economic Development

Small differences in sustained annual economic growth rates lead to massive differences in living standards over several decades.

Frequently Asked Questions

What is the Rule of 70?
Doubling Time (Years) ≈ 70 ÷ Annual Growth Rate (%). An economy growing at 7% doubles its output in ~10 years.