TidyToolsBuy the right amount — first time
The two most annoying DIY mistakes are running out of material halfway through a job, or over-buying and wasting money on stuff you'll never use. These calculators fix both. Enter your measurements and they tell you exactly how much paint, flooring, aggregate, or timber to get — including sensible allowances for waste and coats. Every tool works in metric or imperial and runs entirely in your browser, with no account and nothing stored.