Total growth is the full change from start to finish. Growth per period is the steady, compounded rate that would get you there one period at a time, so it is always smaller than the total when you have more than one period. The per-period figure assumes growth is even across every period.
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A growth rate measures how much a number changed over time. The basic formula is (ending value minus starting value) divided by the starting value, times 100. Grow from 1,000 to 1,500 and that is 50 percent total growth. But total growth hides the pace, so this calculator also gives you the compounded rate per period, the steady step-by-step number that took you from start to end.
There are two numbers worth knowing, and they answer different questions. Total growth rate is the whole change across the span: (end minus start) / start, times 100. Going from 1,000 monthly visits to 1,500 over a year is 50 percent total growth. That tells you the destination, not the speed.
Growth per period tells you the speed. It is the compounded rate that, applied to every period in turn, lands you exactly on the ending value: ((end / start) raised to the power of 1 divided by periods) minus 1, times 100. Spread that same 50 percent across 12 months and each month grew only about 3.4 percent, because every month compounds on the one before it. The per-period number is always smaller than the total once you have more than one period, and the more periods you spread the change over, the smaller it gets.
CAGR, the compound annual growth rate, is not a different formula. It is the per-period growth rate when the period happens to be one year. Set the period unit in the calculator to years and the per-period output is your CAGR. Use total growth when you want the headline change for a report or a quick comparison. Use the per-period or annual rate when you are comparing time spans of different lengths, since a steady percentage per period is the only fair way to line up a six-month result against a three-year one. Be honest about the assumption underneath both: the per-period rate treats growth as perfectly even, while real traffic and revenue move in fits and starts.
Point this at anything that moves over time. For traffic, drop in last quarter's organic sessions and this quarter's, set the period to weeks or months, and you have both the total lift and the weekly pace. For revenue, compare the same month a year apart and read the annual rate to see whether you are beating inflation and your own targets. For users or signups, the per-period rate tells you if acquisition is accelerating or quietly slowing even while the total still climbs. The pattern that matters most is consistency: a modest per-period rate that holds month after month compounds into results that a few big spikes never match. If you want a growth curve like that for your organic channel built on your real rankings and competitors, request a free SEO audit and we will map it out with actual data.
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