Trial Conversion Rate
IntermediateTrial conversion rate is the share of users who become paying customers after a trial period.
The choice of denominator sets the whole number: counting everyone who started a trial and counting only those whose trial has actually ended give different results, and with trials still running the first form depresses the figure artificially. There is also a structural difference that makes comparison meaningless from the start: a trial without a card lets far more people in and produces a low rate, while a card-required trial admits fewer and produces a much higher one, and the two are not comparable. For the same reason another company's published figure is a poor target.
How it is calculated
Trial conversion rate = number of users who started paying ÷ number of trials that ended in the same period
The numerator is only the first successful payment and excludes plan upgrades by existing customers. The denominator needs one fixed definition and is best based on ended trials so that in-flight ones do not distort it. The output is a percentage, and the trial length and whether a card is required must be reported alongside it.