Conversion Rate
The proportion of items moving from one defined state to the next. The arithmetic underneath every funnel and forecast.
The mistake in most reported rates
A conversion rate is a statement about one population: of the things that entered here, this share reached there. The common calculation — conversions this month over entries this month — divides one group by a different group, because the things converting now entered weeks or months ago.
Cohort, not period
Computing it defensibly
Fix the entry definition and write it down. Any change breaks the series and should be recorded as a change.
Group by entry date, not by conversion date.
Wait for the cohort to mature — at least one full sales cycle — before treating the rate as final. Report the share still open alongside it.
Report the count with the rate. A 40% rate on ten records is not a finding.
Segment before comparing. Different sources and segments have genuinely different rates, and a blended figure describes none of them.
Where it misleads
Rates rise when you admit less at the top, so a rate improving alongside falling volume is usually a definitional change rather than an improvement.
A stage with near-100% conversion is not filtering anything and carries no information.
Comparing your rate to a published benchmark compares your entry definition to somebody else's, which is not a comparison at all.
How to calculate one that means something
Use a cohort. Follow a fixed set of records forward rather than dividing this period's outcomes by this period's entries — the point-in-time version is wrong whenever volume is changing.
State the denominator explicitly. Conversion from all leads, from qualified leads, or from leads that were actually worked are three different numbers that get quoted interchangeably.
Report the unresolved share alongside. A rate that excludes records still in flight looks better than reality until those records resolve.
Segment by source and segment before comparing periods. A blended rate moves with mix even when nothing about performance changed.
Check the definition did not change. Tightening a qualification threshold raises conversion arithmetically, and that is not an improvement.
RELATED TERMS
Revenue Funnel
The staged model describing how prospects progress from first awareness to closed revenue, used to locate where volume is lost between stages.
Stage-to-Stage Conversion
The proportion of opportunities moving from each stage to the next. The most localised view of where pipeline dies.
Win Rate
The proportion of opportunities that close won, measured against a defined denominator — which is where most of the disagreement lives.
SQL-to-Close Rate
The proportion of sales-qualified leads that eventually become closed-won revenue.
COMMON QUESTIONS
- How do you calculate a conversion rate correctly?
- On a cohort: take everything that entered at a point in time and follow it forward. Dividing this month's conversions by this month's entries compares two different populations and produces a number that moves on timing alone.
- Why do our conversion rates fluctuate so much?
- Usually because they are period rates rather than cohort rates. When volume changes or the cycle is long, the numerator and denominator describe different groups, and the rate moves without any change in performance.
- What is a good conversion rate?
- Unanswerable without knowing what defines entry to each stage. A team that qualifies strictly will show lower volume and higher conversion than one that does not, with identical results. Compare against your own history at a fixed definition.
- Should conversion rates be a target?
- With care. Every conversion rate improves if you admit fewer records at the top, so a rate target alone rewards restricting volume. Pair it with the absolute count.
Learn how to apply this: RevOps 101: Revenue Operations Foundations
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