Exponential Growth Calculator

Exponential change multiplies by the same factor each period: N = N₀(1 + r)ᵗ. Five percent growth for 12 periods is ×1.05 twelve times — 1.80×, not the 1.60× linear thinking expects. The gap between the two intuitions widens without bound.

Population, compound interest, viral spread, radioactive decay, and Moore's law all follow this one equation with different signs and rates. The doubling time (ln 2 ÷ ln(1+r)) is its most communicable statistic — the rule of 72 is its mental shortcut.