My partner and I kept running into the same wall trying to get a handle on our own marketing. You calculate your conversion rate, or your ROAS, or your email open rate, and you get a number. Then you sit there going: is that good? Bad? Normal? The number on its own tells you almost nothing without something to compare it against.
Most free calculators online stop at the number. So we built a set that doesn't.
It's called StatCalcs: https://statcalcs.com
The idea is that every calculator ships with a benchmark table next to it, so the moment you get your figure you can see roughly where it sits. And the benchmarks are the part we actually cared about getting right.
That turned out to be harder than the maths. The calculators themselves are trivial, it's arithmetic. The real work was the benchmarks, because "the average conversion rate is 2%" is the kind of number that gets copied around the internet with no source and no date until nobody knows where it came from. We didn't want to add to that pile.
The rule we set was that every benchmark has to name its source and its date, and say what it actually measured. The conversion rate figures, for instance, cite Ruler Analytics 2026 (5M+ tracked conversions), cross-referenced against First Page Sage's B2C numbers, and every table carries a "last reviewed" date so you can see how fresh it is. We also flag that Ruler is measuring lead-gen form fills and calls rather than ecommerce checkouts, because that distinction changes what a "good" number looks like. A 2% conversion rate means very different things for a B2B lead form versus a shoe shop.
That last part is the bit we think matters most. A benchmark with no context can quietly mislead you, which is worse than having none, because it hands you false confidence. "Average is X" is meaningless if your traffic is mostly cold paid social and the average was measured on warm email. The tables break the numbers down by channel and by industry where we could find data to back it, and where we couldn't, we left it out rather than guess.
What's in it right now: conversion rate, click-through rate, ROAS, engagement rate, email open rate, churn, average order value, and an ecommerce conversion rate breakdown by industry. All free, no sign-up, works on your phone.
If you use it and a benchmark looks out of date, or a formula looks off, tell us. We'd genuinely rather hear it than have a wrong number sitting there. Half the reason we're posting this is to get more eyes on the numbers.
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