Growth Rate Comparison Calculator

Compare growth rates (CAGR) across up to 3 metrics, business lines, cohorts, or time periods. Free calculator with multi-line comparison chart and table.

What is Growth Rate Comparison Calculator?

The Growth Rate Comparison Calculator lets you compare the growth trajectory of up to three different metrics, business lines, customer cohorts, or time periods side by side. For each series, enter a starting value, ending value, and number of periods to see its compound growth rate per period, total growth percentage, and a visual trajectory chart comparing all series together.

Formula

Growth Rate Per Period = ((Ending Value ÷ Starting Value)^(1 ÷ Number of Periods) − 1) × 100. Total Growth = ((Ending Value − Starting Value) ÷ Starting Value) × 100.

How to Calculate

For Series A, enter the starting value, ending value, and number of periods.
Repeat for Series B and Series C if you want to compare additional series.
Review the growth rate per period and total growth percentage for each series.
Use the comparison chart to visualize how each series compounds over time.

Example

Series A grows from $100,000 to $250,000 over 12 months (18.6% growth per period, 150% total growth). Series B grows from $50,000 to $150,000 over 24 months (4.7% growth per period, 200% total growth). Although Series B has higher total growth, Series A actually compounds faster per period — a distinction only the period growth rate reveals.

Key Benefits

Compare up to three growth series side by side in one view instead of separate spreadsheets
See both the compound growth rate per period and the simple total growth percentage for each series
Visualize how each series' trajectory diverges over time with a shared comparison chart
Export your full comparison as PDF, Excel, or CSV for reports or board decks

Common Mistakes to Avoid

Comparing total growth percentages directly without accounting for different numbers of periods, which can make a slower-compounding series look better than a faster one
Assuming linear growth when actual growth compounds — a series growing 10% per period for 10 periods ends up far higher than 100% total growth
Ignoring that a small per-period growth rate difference becomes a large gap over many periods due to compounding

Pro Tips

Always compare period-normalized growth rates, not just total growth percentages, when the series span different numbers of periods
Use consistent period lengths (all monthly, or all quarterly) across series for a fair comparison
Revisit this comparison regularly as new data comes in — early growth rate comparisons can shift significantly as a trend matures

Key Terms Explained

CAGR (Compound Annual Growth Rate): The rate of return that would be required for an investment or metric to grow from its starting value to its ending value, assuming compounding at that rate every period
Total Growth: The simple percentage change from a starting value to an ending value, without accounting for the number of periods it took
Compounding: The process by which growth in one period builds on the already-grown value from the previous period, rather than always growing from the original starting value
Period: A consistent unit of time (month, quarter, year) used to measure and compare growth across series

Common Use Cases

Comparing revenue growth across different product lines or business units
Comparing user acquisition growth across different marketing channels
Comparing this year's growth to last year's growth for the same metric
Deciding which of several growing initiatives deserves more investment based on compounding speed

Frequently Asked Questions

What can I compare with this calculator?

Anything measured as a value that changes over time: revenue across product lines, user growth across marketing channels, monthly recurring revenue across customer segments, or the same metric across different time periods (this year vs. last year). Enter a starting value, ending value, and number of periods for each series you want to compare.

What's the difference between growth rate per period and total growth?

Total growth is the simple percentage change from start to end (ending value minus starting value, divided by starting value). Growth rate per period is the compound rate that, applied repeatedly across each period, would produce that same total change — this is more useful for comparing series with different numbers of periods, since total growth alone doesn't account for how long it took.

Why might two series have the same total growth but look very different on the chart?

If one series grew over 12 months and another grew the same total percentage over 24 months, their per-period growth rates are very different — the 12-month series compounded faster. The chart plots each series' actual trajectory, making this difference visually obvious even when total growth percentages match.

How is this different from a standard CAGR calculator?

This calculator applies the same CAGR-style formula but is built specifically to compare up to three series side by side, with a shared chart and table — useful for comparing business lines, channels, or cohorts against each other rather than analyzing a single metric in isolation.