YoY Growth Calculator
Work out year-over-year (YoY) or month-over-month growth, and compound growth across a series.
About the YoY Growth Calculator
Compare two values for growth over one period, or paste a series of values to see each period's growth and the compound growth rate.
Period-over-period growth is the change divided by the previous value. Across several periods, the compound annual growth rate (CAGR) is the steady rate that would get from the first value to the last; it's lower than the average of yearly growth rates when growth is uneven. Use YoY comparisons for seasonal businesses so December is compared with last December.
The formula
Growth = (current − previous) ÷ |previous|; CAGR = (last ÷ first)^(1/periods) − 1
Worked example
Revenue of 120,000 last year and 150,000 this year
- Change: 30,000
- Growth: 30,000 ÷ 120,000 = +25%
Questions people ask
MoM vs YoY?
Month-over-month compares adjacent months; year-over-year compares the same month a year apart.
Why not average the growth rates?
Averages overstate growth when rates vary; CAGR is exact.