Construction & Measurement Calculators
Square footage and concrete volume for real projects, in both imperial and metric units.
- Square Footage Calculator Area of rooms, lots and odd shapes in square feet and square meters. Construction
- Concrete Calculator Concrete volume in cubic yards, cubic feet and cubic meters, plus bag counts. Construction
About these calculators
Measurements for real projects: how much floor you have, and how much concrete it takes to fill a form. Both come with the same trap — the number you calculate is not the number you order, because cuts, offcuts, spillage and uneven ground all eat into it.
These calculators show the true figure and the figure to buy side by side, in both imperial and metric units, and say plainly that they are planning estimates. Anything structural should be specified by an engineer or confirmed with your supplier.
Other categories
- Math Percentages, percentage change and fractions — the everyday arithmetic people look up most. 3 calculators
- Time & Date Ages, date differences, durations and timesheets, with leap years handled properly. 4 calculators
- Everyday Tips, discounts and sales tax — the quick sums you do in a shop or at a restaurant table. 2 calculators
- Design & Tech Aspect ratios and screen dimensions for video, photography and web design. 1 calculator