Compound annual growth rate between a start and end value over N years.
About this calculator
Compound Annual Growth Rate answers “what constant yearly growth rate would take my start value to my end value?” It's calculated as (End Value ÷ Start Value)^(1÷Years) − 1, expressed as a percentage.
Unlike a simple average of yearly changes, CAGR accounts for compounding, so it's the standard way to compare investment or business growth over multi-year periods.
Frequently asked questions
What counts as a good CAGR?
It depends entirely on context — a savings account, a stock index and an early-stage company all have very different norms. CAGR is most useful as a like-for-like comparison between options over the same period, not as an absolute score.
Why not just average the yearly growth rates?
A simple average ignores compounding and flatters volatile results. Gaining 50% then losing 50% averages to zero, but you actually end down 25% — CAGR captures that correctly.