Free tools for architecture
Quick calculators for everyday design work. They run in your browser, in metric or imperial, with no sign-up and nothing to install.
Design
- Scale calculatorDrawing size to real size and back, at 1:100, 1:50 or 1/4" = 1'-0".
- Floor area ratioMaximum floor area from a zoning FAR, or the FAR of a design.
- Stair calculatorRisers, treads, angle and total run of a stair, with Blondel's rule.
- Ramp slope calculatorLength, grade and landings of a ramp for a given rise.
- Roof pitch calculatorRoof pitch as X/12, degrees and percent, with ridge height and roof area.
- Parking ratio calculatorParking spaces per floor area and the lot area they take up.
- Room size calculatorFloor area, perimeter, walls and volume of a room, with IRC minimums.
Building and materials
- Square footage calculatorArea of rectangles, triangles, circles and trapezoids in sq ft, m² and acres.
- Square meter calculatorSquare meters from length × width, plus m² to sq ft, hectares and acres.
- Paint calculatorGallons or liters of paint for walls and ceiling, minus doors and windows.
- Tile calculatorTiles and boxes for a floor or wall, with grout joint and waste.
- Drywall calculatorDrywall sheets for walls and ceiling, minus doors and windows.
- Insulation calculatorInsulation thickness to reach a target R-value or RSI, by material.
- Brick calculatorBricks per sq ft and the total for a wall, with mortar joint and waste.
- Board foot calculatorLumber volume in board feet and m³, per piece and per order.
From drawing to render in minutes
Upload a floor plan, a sketch or a screenshot of your 3D model and get a photorealistic image that stays faithful to what you drew.
No credit card required