Construction Unit Converters
Feet, inches, square feet, PSI, and cubic yards — the units US builders, contractors, and estimators use on every job. Convert between imperial and metric with exact NIST factors.
Photo: Glenov Brankovic / Unsplash
Construction converters
Featured construction tool
Construction & Building Converter Pack →
Board feet, cubic yards, square footage, and material-unit conversions for site work and estimating.
Frequently Asked Questions
Which units do US construction projects use?
US construction runs on imperial: feet and inches for length, square feet for area, cubic yards for concrete, pounds for weight, and psi for strength. Metric appears on imported materials and international specs.
Why does construction unit conversion matter?
A 0.5-inch error on a footing or the wrong psi on a concrete spec can cost thousands and fail inspection. Using the unit your drawings and codes expect prevents costly mistakes.
Is this the same converter as the generic tools?
This hub shows only the converters used on US construction sites — length, area, pressure, weight, and temperature pairs relevant to building. The same exact NIST factors apply to every converter.
Sources & accuracy
Unit factors on this page follow the exact definitions published by NIST and the BIPM SI Brochure.
Trade-specific sizing (wire ampacity, rebar, concrete cover) follows US model codes — NFPA 70 (NEC) and ACI 318. Local jurisdictions amend these codes; always confirm with your authority having jurisdiction (AHJ) before field use.
Full, citable source list: UnitFig Sources & Standards →