Square Footage & Square Meter Calculator
Draw your floor plan to scale and read off every room's area — in square feet or square metres.
Drag a point or a wall to move it · double-click a point or wall to delete it.
Materials & cost (optional)
Waste covers offcuts for flooring, tile or turf — 10% is a common allowance. Add a price to estimate material cost from the total area above.
How to measure square footage
Draw your space like a simple CAD sketch. In Draw walls mode each click places a corner and chains a wall to the last one — every wall shows its length, points snap to the grid and to existing corners, and Ortho locks walls to 0/45/90°. Close a loop by clicking back on an existing point, and the enclosed space fills in with its area labelled at its centre. In Select / move mode, drag any point or wall, or double-click to delete. Each grid square is one foot by default (change "1 square =" for larger spaces).
Square feet to square meters
Drawing in feet but need metric, or the other way round? Change the grid scale, or use this quick reference — one square foot is about 0.0929 m², and one square metre is about 10.76 sq ft.
| Square feet | Square metres |
|---|---|
| 100 sq ft | 9.3 m² |
| 250 sq ft | 23.2 m² |
| 500 sq ft | 46.5 m² |
| 1,000 sq ft | 92.9 m² |
How much flooring, tile or turf do I need?
Draw the room, read the total area, then add a waste allowance (10% is typical, more for diagonal or patterned layouts) in the Materials & cost card — and enter a price per sq ft to estimate the bill. That total is what to buy for flooring, tiling, carpet, turf or paint coverage.
Can I type exact lengths and angles?
Yes — click any wall's length label or any corner's angle label and type the exact value; the wall resizes (or the corner rotates) to match. Use the mouse wheel or the +/− buttons to zoom, and drag empty space (in Select mode) to pan around a large plan.
Can I measure several rooms at once?
Yes — every closed loop you draw becomes its own space with its own area label, and the figure at the top is the total across all of them. Shared walls are fine: a wall that splits a room in two gives you both areas.
How do I draw an L-shaped room?
Just keep placing corners around the L — six clicks instead of four — and close back on your starting point. Ortho keeps every wall square while you do it.
Why add a waste allowance?
Flooring, tile and turf produce offcuts, and you'll want spares for cuts and mistakes. 10% is a common starting point; use more for diagonal or patterned layouts.
How accurate is it?
The area is the exact geometric area of the shape you draw (the "shoelace" formula) scaled by your grid size — so it's as good as your measurements and the grid you snap to.
How do I calculate the square footage of a room?
For a plain rectangle, multiply length × width. For anything irregular — L-shapes, alcoves, or several rooms — just draw it here and the area is worked out for you, including the total across every space.
How many square feet are in a square metre?
About 10.76 square feet. Going the other way, one square foot is roughly 0.0929 square metres.
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