About HandyConvert
Calculations done right.
What this is
HandyConvert is a growing collection of online calculators and converters for home improvement, construction, and cooking. Each tool is built to do one job well: give you a clear, accurate answer for an ordinary task — cutting a sheet of plywood, sizing a set of stairs, estimating paint.
How the tools are built
Every calculator shows its work. Results update as you type, the math is laid out so you can check it, and where a picture helps we draw a diagram. Tool settings encode into the page URL, so you can bookmark a calculation or send it to someone else. There are no accounts and nothing to sign up for.
Accuracy
We work hard to get the math right and to cite our sources for any reference data. Even so, the results are estimates meant to support your own judgement. For anything you cut, build, or pour: measure twice, and verify against your own materials before you commit.
Get in touch
Spotted an error, or want a calculator that doesn’t exist yet? The contact page is the place to tell us.