About HoneyDoMath

Measure twice, buy once. Free, with no sign-up, and your project stays on your device.

HoneyDoMath is a free set of calculators for home projects. Enter the space once, and get the quantity of material to buy, the working behind it, a printable shopping list and a share link. Pages show imperial units, and a switch on each calculator shows the same figures in metric.

How we handle numbers and codes

Any law or number shown as a fact has a direct official source, and that source is cited on the same page. We use three kinds of source, each only for its own kind of fact: model codes and government or university extension sources for code limits and guidance; the manufacturer's own data for that product's coverage, yield or size; and standards and industry bodies for estimating practice. We do not use blogs, retailer pages or forums.

If we cannot confirm a value from one of these, it is not shown as a fact: it is an input you set, with a note to check your label or supplier. Where sources differ, we show a default, name the other value and let you change it.

Figures that come from a maker's data sheet are credited to that maker, with the date we checked. Naming a maker does not mean it has any connection with us.

How we calculate

The rules every calculator follows, with worked examples, are on the How we calculate page.

Who runs it

HoneyDoMath is made by The Stroop LLC, a Washington limited liability company, which also makes other small, useful tools. We do not offer handyman or contractor services and we do not refer you to anyone. Questions and corrections are welcome on the Contact page.