Free trial conversion rate calculator
See what a 1–2 percentage point improvement in your trial conversion rate is actually worth in MRR — and how it compounds over a year.
Enter your monthly trial volume, current conversion rate, and average revenue per customer. Set a target conversion rate to see the incremental MRR and annual revenue impact of reaching it.
Free trial conversion rate calculator inputs and results
How this calculator works
New MRR from trials = monthly trial starts × conversion rate × ARPU. The incremental MRR is the difference between the target and current figures. The 12-month ARR impact is the incremental monthly new MRR multiplied by 12 — it represents the additional revenue added in the first year if the improved conversion rate holds constant, not the cumulative ARR impact including retention.
This calculator isolates the conversion rate lever. The same improvement in MRR could also be achieved by increasing trial volume, increasing ARPU through pricing, or some combination of all three. Conversion rate is often the highest-leverage lever because it extracts more value from existing acquisition spend without needing more traffic.
About this tool
This tool calculates the revenue impact of changes to a SaaS free trial. Inputs: monthly trial starts, current trial-to-paid conversion rate, average revenue per customer per month, and a target conversion rate to compare against. Outputs: current and target MRR from trial conversions, incremental MRR from the improvement, and annualised revenue impact. A second section models how trial length affects conversion using a decay curve.
Frequently asked questions
How is trial conversion rate defined?
Trial conversion rate is the percentage of users who start a free trial and subsequently become paying customers. It's typically measured over a fixed cohort window — for example, of 100 users who started a trial in January, how many converted to paid by the end of February. Define a consistent window for your business and use it consistently; mixing different window lengths will produce misleading trends.
What's a good free trial conversion rate for SaaS?
It depends heavily on the trial model. Opt-in trials (no credit card required) typically convert at 2–5%. Opt-out trials (credit card required upfront) convert at 25–60% or higher, but fewer users start them. The more relevant benchmark is your own trend over time and cohort-by-cohort comparison. A 3% conversion rate improving to 4% is a 33% increase in revenue from the same trial volume — the absolute percentage matters less than the direction and pace of change.
How does trial length affect conversion?
Longer trials give users more time to experience value, but they also delay the conversion decision and reduce urgency. The optimal trial length depends on how quickly a user can reach a meaningful "aha moment." Simple tools often convert better on 7-day trials. Complex B2B products with longer onboarding may need 30 days or more. The key metric is not just conversion rate but time-to-convert: if most paying users convert in the first week of a 30-day trial, shortening the trial may not hurt conversion but will improve cash flow.
What levers improve trial conversion most?
Activation — getting users to a meaningful action within the first session — is consistently the highest-leverage improvement. Users who reach the core value moment convert at 2–5× the rate of those who don't. After activation, in-trial email sequences triggered by behaviour (or lack of it) make the biggest difference. Trial length and pricing are lower-leverage than most founders expect; fixing activation first is almost always the right priority.