Why it matters
A free plan removes the first barrier to trying a product, and it also fills the account list with people who may never pay. The freemium conversion rate shows how many of them cross over, which decides whether the free plan is an investment or only a cost.
Because upgrades keep arriving for months, the number has no meaning until you name the window. A rate measured at 90 days and a rate measured at 180 days describe the same people at different moments, so quote both and always say which one you mean.
The formula
In words: the free signups in a cohort that upgraded within the window, divided by all free signups in that cohort, then multiplied by 100. Show a 90 day and a 180 day window.
In symbols:
freemium_rate(window) = upgraded_within_window / free_signups_in_cohort x 100- The cohort is every free-plan sign-up from one period, active or not.
- Count an upgrade only when it falls inside the window, measured from each person’s own signup date.
- Some products have no free plan and run a short paid trial instead. For those, use the trial to paid conversion rate.
A worked example
Example numbers (made up for illustration): 2,400 free-plan sign-ups arrived in one month, and you counted how many of them upgraded inside two windows.
| Window | Free signups in the cohort | Upgraded within the window | Rate |
|---|---|---|---|
| 90 days | 2,400 | 190 | 7.9% |
| 180 days | 2,400 | 265 | 11.0% |
190 upgrades inside 90 days is 7.9%, and 265 inside 180 days is 11.0%. It is the same cohort, so the longer window can only be equal or higher. Quote the window every time.
What published data says
A published median for free to paid conversion is a rough guide only. Check the window and the kind of product it was measured on before you compare it with your own 90 or 180 day figures.
- Median free-to-paid conversion rate across 200 products: 8%. ChartMogul, The Conversion Report (Kyle Poyar, 4 Feb 2026), January 2026 study of 200 products. Read on 18 Oct 2026. Source.
How to improve it
The strongest moves connect what free users do with what the paid plan adds.
- Find the action that free users take shortly before they upgrade, and guide new users toward it first.
- Place the limit of the free plan where people meet it while doing real work, with the upgrade option beside it.
- Message free users as they approach a limit, not only after they hit it.
- Be able to name in one sentence what the paid plan adds, and show that sentence where the upgrade is offered.
Common mistakes
- Quoting a rate without its window, so a 90 day figure gets compared with a 180 day figure.
- Dropping inactive free signups from the denominator, which makes the rate look better than it is.
- Mixing cohorts from different months into one number, so a recent cohort that has had little time drags the figure down.
- Comparing a freemium rate with a trial rate as if both started from the same point. They measure different people.
Work it out with your own numbers
The same arithmetic applies to free signups, and the trial conversion rate calculator will do it for any cohort. Open the trial conversion rate calculator and enter your own figures. It runs in your browser and shows each step of the sum.
Read next
- Trial to paid conversion rate: the measure for products that start with a trial.
- Visitor to trial conversion rate: the step from visit to sign-up.
- Churn rate: what happens to customers after they upgrade.
Questions
Which window should I report?
Report at least two, such as 90 and 180 days, and name the window each time. A single number with no window cannot be compared with anything.
Should inactive free signups stay in the denominator?
Yes. They are part of the cohort, and removing them makes the rate look better without any change in how many people upgraded.
Why does the longer window give a higher rate?
It covers the same cohort for more time, so more people have had a chance to upgrade. For one cohort the longer window can only be equal or higher.
Is this the same as a trial conversion rate?
No. A trial has a fixed end date and a freemium plan does not, so the freemium rate depends on the window you choose.