Architecture
Scales, room volume, geometry. Pure architectural math, free, in-browser.
What this is
A focused set of architectural calculators — pure geometry and dimensional math. No materials, no project planning (that lives on our companion site RenoSheets). Each tool runs entirely in your browser, encodes its inputs in a shareable URL, and shows its math.
Tools
Drafting
Architectural scale converter Convert between 1:50, 1:100, 1:200, 1/4″=1′-0″ and other drawing scales. Read drawn lengths as real-world dimensions. Live Mixed-unit calculator Add, subtract, multiply, divide mixed-unit lengths like "3 ft 7 1/2 in + 5 cm". Parses fractions, prime marks, decimals. Outputs in 7 formats. LiveGeometry
Room volume calculator L × W × H room volume in ft³, m³, gallons, and litres. HVAC sizing reference (BTU/ft³) and air-changes-per-hour ventilation table. Live Cylinder volume calculator Volume of a cylinder (concrete columns, water tanks, pipe capacity) in cubic feet, cubic metres, gallons, litres, cubic yards, and barrels. Live Right triangle calculator Pythagorean solver: type any two values (sides or angles) and the rest fill in. For rafters, ramps, stairs, squaring layouts. Live Floor area calculator Multi-room square footage. Add rooms as rectangles, sum total area in ft², m², acres. Optional cost-per-sqft for flooring, paint, or rent estimates. Top-down plan view. Live Acreage calculator Land parcel size between acres, hectares, ft², m², yd². L × W or direct area input. Comparison overlays (football fields, NYC blocks, parking stalls). LiveReference only
These calculators are geometric references, not structural engineering. Structural sizing of beams, columns, slabs, and connections requires a sealed drawing reviewed by a qualified engineer or contractor working from the local building code.