Every converter here works in both directions and uses exact factors rather than rounded ones. They share the calculator’s code, so a conversion on this page and a conversion inside the calculator can never disagree.
Which one you need usually follows the job:
- Flooring, tile and paint across borders — square feet to square metres.
- Land, lots and plots in the United States — acres to square feet, and how big an acre is, drawn to scale.
- Land measured in hectares — hectares to acres.
- Carpet quoted the old way — square feet to square yards.
If you have not measured yet, start with the calculator: it takes feet and inches or metres, works out the area, and shows the result in all of these units at once.