Free Trial Conversion Rate Calculator: Trials That Become Paying Customers
Work out your free trial conversion rate from trials that converted and total trials started — the core SaaS and subscription metric for how well your trial turns interest into paying customers.
Adjust the inputs and select Calculate for a full breakdown.
Compare Common Scenarios
How the numbers shift across typical situations for this calculator:
| Scenario | Conversion rate | Did not convert |
|---|---|---|
| 180 of 1,000 (18%) | 18.00% | 82.00% |
| 500 of 1,000 (50%, card required) | 50.00% | 50.00% |
| 120 of 1,000 (12%, no card) | 12.00% | 88.00% |
| 75 of 300 (25%) | 25.00% | 75.00% |
How This Calculator Works
Enter the number of trials that converted to paid and the total trials started during the period. The calculator divides one by the other and multiplies by 100 to give the conversion rate, with the non-conversion share shown alongside.
The Formula
Part as a Percentage of a Whole
Part is the portion, Whole is the total it belongs to
Worked Example
180 conversions out of 1,000 trials is an 18% conversion rate, with 82% not converting. What counts as 'good' depends heavily on the trial model: opt-out trials that require a credit card upfront convert much higher (often 40%–60%) because billing starts automatically, while opt-in trials with no card convert lower (often 10%–25%) but attract more top-of-funnel signups. Comparing your rate to a benchmark only makes sense against the same trial model.
Key Insight
Free trial conversion rate is one of the most model-dependent metrics in SaaS, so context is everything. The single biggest lever is whether you require a card upfront: opt-out (card-required) trials convert far higher but draw fewer, more-qualified signups; opt-in (no card) trials convert lower but fill the top of the funnel — and the better choice depends on your sales motion and price point. Beyond the model, conversion is driven by time-to-value (do users hit their 'aha' moment during the trial?), onboarding quality, trial length (too long delays the decision; too short doesn't show value), and well-timed nudges as the trial ends. Watch the rate as a trend and segment it by acquisition source and user behavior — users who complete a key activation action during the trial convert dramatically better, which tells you where to focus the onboarding.
Frequently Asked Questions
How is free trial conversion rate calculated?
Divide trials that converted to paid by total trials started, then multiply by 100. 180 conversions out of 1,000 trials is an 18% conversion rate, with 82% not converting.
What's a good free trial conversion rate?
It depends entirely on the trial model. Opt-out trials requiring a card upfront often convert 40%–60%; opt-in trials with no card often convert 10%–25%. Compare your rate only against the same model — an 18% rate is solid for opt-in but low for card-required.
Should I require a credit card for the trial?
It's a tradeoff. Requiring a card (opt-out) raises conversion rate and filters for serious users but reduces total signups. Not requiring one (opt-in) fills the funnel with more leads at a lower conversion rate. The right choice depends on your price point, sales motion, and whether volume or qualification matters more.
How can I improve trial conversion?
Get users to value fast (shorten time-to-value with strong onboarding), guide them to a key activation action during the trial, choose a trial length that shows value without dragging out the decision, and add well-timed reminders as the trial ends. Users who activate a core feature convert far better.
Why segment the conversion rate?
Because the average hides what drives conversion. Segmenting by acquisition source reveals which channels send users who convert, and segmenting by in-trial behavior shows that users who complete a key action convert dramatically better. Those insights tell you where to focus onboarding and marketing spend.
Related Calculators
Methodology & Review
The conversion rate is converted trials divided by total trials, multiplied by 100. The complement is the share that did not convert. It measures trial-to-paid conversion over a period and does not distinguish opt-in (card-required) from opt-out trial models, which convert very differently.
Written by Ugo Candido · Last updated May 22, 2026.