Construction Calculator
Feet-inch-fraction math and 200+ free building calculators
Construction Calculator is the math tool built for the job site. Type measurements exactly as you read them off a tape measure, in feet, inches, and fractions, and get instant answers without converting units. Results display in feet-inches-fractions, decimal feet, decimal inches, and metric simultaneously. The iOS app includes a stair calculator (IRC code compliant), rafter calculator, and triangle/circle/arc tools. Plus 200+ free online calculators at getconstructioncalculator.com covering concrete, roofing, lumber, framing, fencing, flooring, and unit conversions. Rated 4.7 stars with 479 reviews. Free on iOS with optional premium features.
Features
Feet-inch-fraction arithmetic: Add, subtract, multiply, and divide without converting units. Stair calculator: Computes risers, treads, and stringer length per IRC building code. Rafter calculator: Handles rafter length, ridge height, and birdsmouth cuts. Triangle and circle tools: Solve any triangle or circle dimension from partial inputs. 200+ free web calculators: No download or signup needed, works in any browser. Multi-format results: Answers in feet-inches-fractions, decimal feet, decimal inches, and metric.
Use Cases
Contractors doing quick on-site math with tape measure readings in feet-inches-fractions. Builders designing stairs that meet IRC code requirements for rise, run, and headroom. Roofers calculating rafter lengths, ridge heights, and birdsmouth cuts for framing. DIYers estimating concrete yards for slabs, footings, and columns. Estimators calculating square footage, board feet, and material quantities. Students and apprentices learning construction math with worked examples.
Comments
Hi Fazier community! I built Construction Calculator because doing math on the job site with feet, inches, and fractions is a pain. Most calculators force you to convert everything to decimals first. Ours lets you type measurements exactly as you read them off the tape. The app started as a simple iOS calculator in 2016 and has grown to include stair layout, rafter calculations, and triangle/circle tools. We recently launched 200+ free web calculators at getconstructioncalculator.com so anyone with a browser can use them without downloading anything. Happy to answer any questions about construction math or the tools!
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Comments
Hi Fazier community! I built Construction Calculator because doing math on the job site with feet, inches, and fractions is a pain. Most calculators force you to convert everything to decimals first. Ours lets you type measurements exactly as you read them off the tape. The app started as a simple iOS calculator in 2016 and has grown to include stair layout, rafter calculations, and triangle/circle tools. We recently launched 200+ free web calculators at getconstructioncalculator.com so anyone with a browser can use them without downloading anything. Happy to answer any questions about construction math or the tools!
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