Architecture & Design Calculators
Estimate dimensions and materials for rooms, floor areas, roofs, stairs, paint, lighting and scaled drawings. These calculators can support early design planning, quantity estimates and quick checks for students, designers and building teams. Confirm site measurements, local building requirements and professional design calculations before construction.
Area, Floor & Space
10 toolsArea Calculator
Calculate area for common shapes and spaces.
Floor Area Calculator
Calculate floor area from room dimensions.
Room Area Calculator
Calculate the floor area of a room.
Total Floor Area Calculator
Combine multiple floor areas into one total.
Wall Area Calculator
Calculate wall surface area for planning and finishing.
Ceiling Area Calculator
Calculate ceiling surface area from room dimensions.
Perimeter Calculator
Calculate perimeter for common shapes.
Usable Floor Area Calculator
Estimate usable floor area after deductions.
Built-Up Area Calculator
Calculate built-up area from floor dimensions.
Floor Space Index (FSI/FAR) Calculator
Calculate floor space index from floor and plot area.
Scale, Dimensions & Drawing
8 toolsScale Calculator
Convert between drawing scale and real-world dimensions.
Architectural Scale Calculator
Work with common architectural drawing scales.
Drawing Length Calculator
Calculate drawing length from a real-world dimension and scale.
Real Length Calculator
Calculate real-world length from a drawing dimension and scale.
Dimension Conversion Calculator
Convert common architectural dimensions between mm, cm, m, inches and feet.
Square Feet to Square Meters Calculator
Convert square feet to square meters.
Square Meters to Square Feet Calculator
Convert square meters to square feet.
Room Dimension Calculator
Find a missing room dimension from area and the known dimension.
Rooms & Interior Space
8 toolsRoom Size Calculator
Calculate room size from its dimensions.
Furniture Space Calculator
Estimate floor space required by furniture.
Furniture Clearance Calculator
Calculate available clearance around furniture.
Corridor Width Calculator
Calculate corridor width from planning inputs.
Door Size Calculator
Calculate door area and dimensional requirements.
Window Size Calculator
Calculate window dimensions and area.
Window-to-Floor Ratio Calculator
Calculate window area as a percentage of floor area.
Occupancy Calculator
Estimate occupancy from floor area and area per person.
Roof & Slope
8 toolsRoof Pitch Calculator
Calculate roof pitch from rise and run.
Roof Slope Calculator
Calculate roof slope from rise and run.
Roof Angle Calculator
Calculate roof angle from rise and run.
Roof Area Calculator
Estimate roof surface area from dimensions and slope.
Roof Rise Calculator
Calculate roof rise from run and slope.
Roof Run Calculator
Calculate roof run from rise and slope.
Rafter Length Calculator
Calculate rafter length using rise and run.
Roofing Material Calculator
Estimate roofing material quantity from roof area and coverage.
Stairs & Vertical Dimensions
6 toolsStair Calculator
Calculate stair rise, tread and overall dimensions.
Stair Riser Calculator
Calculate riser height from stair dimensions.
Stair Tread Calculator
Calculate tread depth from stair dimensions.
Stair Angle Calculator
Calculate stair angle from rise and run.
Number of Steps Calculator
Estimate the number of stair steps required.
Staircase Length Calculator
Calculate horizontal or sloping staircase length.
Materials & Construction Quantities
5 toolsConcrete Volume Calculator
Calculate concrete volume from length, width and depth.
Brick Calculator
Estimate the number of bricks required for a wall.
Tile Calculator
Estimate tiles required for a floor or surface.
Flooring Material Calculator
Estimate flooring material required for an area.
Gravel & Sand Calculator
Estimate gravel or sand volume from dimensions.
Paint & Finishing
3 toolsLighting & Electrical Planning
2 toolsAbout these Architecture & Design calculators
Use these free tools for planning and estimating areas, dimensions, scales, rooms, roofs, stairs, construction materials, paint and lighting. Results are intended for general planning and estimation; local building codes, structural requirements and professional specifications may vary.