Customer Retention Rate Calculator

Calculate the percentage of starting customers retained through a period, excluding newly acquired customers.

InputsChange a value to recalculate instantly

Starting customers

Ending customers

New customers acquired

ResultUpdates as you type

Customer retention rate90%

How it worksTransparent math

Calculation details are shown above.

Result breakdownSee the important numbers together

1Customer retention rate90%

λ DooMathWork with this calculation

Local · deterministic · optional

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Quick mathNatural-language-style shortcuts for deterministic arithmetic.

Calculator guide

How to use the Customer Retention Rate Calculator

Calculate the percentage of starting customers retained through a period, excluding newly acquired customers.

01Set inputsChoose values, units and assumptions.

02Apply the modelRetention rate = (Ending customers − New customers) ÷ Starting customers × 100.

03Read the resultCheck the output against the assumptions before using it.

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Remove newly acquired customers from the ending total, then compare the retained starting customers with the starting base.

functions

Retention rate = (Ending customers − New customers) ÷ Starting customers × 100.

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