Tell us what is wrong
Corrections to the maths jump the queue. Suggestions go onto the build list and get validated against real search demand before anything is built.
What happens next
A report about a wrong result gets checked against the formula and the unit conversions the same week. If it turns out we are wrong, the fix ships with a new formula version and the last-reviewed date on that calculator changes.
A suggestion for a new calculator gets added to our internal map and checked against actual keyword research before it is built. We do not publish tools speculatively, and we will not publish a near-duplicate of an existing one just because it has a different name.
What we collect
The reason you picked, the message you typed, and which calculator you were on. Nothing you entered into the calculator itself is transmitted — your dimensions, rates and prices never leave your browser.