CMGR Calculator

Calculate your compound monthly growth rate.

Your calculation result will show up here.

Your CMGR is:

What is compound monthly growth rate (CMGR)?

CMGR expresses growth between a starting and ending value as an equivalent constant monthly rate. It smooths the path between two values rather than describing each month’s actual performance.

How to use this tool

This calculator uses CMGR = [(ending value ÷ starting value)^(1 ÷ (monthly observations − 1)) − 1] × 100. The months field counts monthly observations, including both endpoints: January through April is four observations and three growth intervals.

Example

A starting balance of $1,000 and ending balance of $1,331 across four monthly observations gives 10% compound monthly growth.

Understanding your result

Use a positive starting value and more than one observation. The displayed inputs are cash balances; deposits and withdrawals can drive balance growth independently of business performance. CMGR does not reveal volatility between endpoints.

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