Retention
Calculate Retention instantly with the exact formula and a worked example. Free online calculator — no signup.
Retention
End of period
New
At start
Retention
90%
More about: Retention
What it calculates
The “Retention” calculator computes Retention in % from 3 parameters: end of period, new, at start.
Applied in business management, unit economics, and financial modeling.
Example calculation
With parameters End of period = 110, New = 20, At start = 100 the result is 90 % (((End − New) / Start) × 100).
How to use
- Enter the parameter values — every field above is adjustable with a slider.
- The result and related metrics are calculated automatically as you type.
- Use the additional metrics shown (if any) where needed.
- Copy the result or bookmark the page.