Builders-Calc

No fractions? No good. Builders-Calc is the only construction calculator in this price range with a native fraction keyboard. Tap ½" instead of typing 0.500. Built for people who work in feet, inches, and fractions — not decimal approximations. — FRACTION KEYBOARD — Every inches input has an ⅛ ¼ ⅜ ½ ⅝ ¾ ⅞ button row. Tap once to set the fraction. Tap 0 to clear. No typing. No rounding errors. — FIVE CALCULATORS IN ONE — LUMBER • Board Feet — thickness × width × length with a quantity multiplier. Know exactly how many board feet you're buying before you leave the yard. • Studs — enter wall length and height, choose 12"/16"/24" on-center spacing, and get stud count plus total linear footage for plates. • Plywood — square footage plus waste percentage gives you the exact number of 4×8 sheets to order. CONCRETE • Slab — length, width, and depth in inches gives you cubic yards and bag counts for both 60 lb and 80 lb bags simultaneously. • Footing — linear footage with width and depth in inches → cubic yards and bag counts. • Post Hole — diameter, depth, and hole count → total cubic yards and bags. Run 12 fence posts and see the total in one tap. ROOF • Pitch Info — enter your X:12 rise and instantly see the angle in degrees, grade percentage, roof multiplier, and a plain-English slope description (e.g. "Moderate — most common residential"). • Rafter Length — horizontal run plus pitch → rafter length in both decimal feet AND feet/inches/eighths so you can mark it directly on the stock. • Roofing Squares — building footprint plus pitch and waste percentage → plan area, actual surface area, squares, and bundle count. STAIRS • Enter total rise in feet, inches, and fractions using the fraction picker. Enter tread depth the same way. Get number of risers, riser height, total run, and stringer length — all in feet/inches/eighths. • IRC Code Check flags automatically if your riser height exceeds the 7¾" maximum or your tread is below the 10" minimum. CONVERT • Feet & Inches — feet, whole inches, and fraction → decimal feet, total inches, meters, centimeters, and millimeters all at once. • Metric — enter meters and get feet & inches (displayed as 6' 3½"), decimal feet, total inches, centimeters, and millimeters. • Temperature — live Fahrenheit ↔ Celsius converter plus a concrete curing temperature reference chart (ideal range, cold weather warnings, hot weather precautions). — WHO THIS IS FOR — Carpenters, framers, concrete workers, roofers, stair builders, general contractors, and serious DIYers. Anyone who has ever groaned at a calculator app that only speaks decimal. — NO NONSENSE — • One-time purchase. No subscription. No ads. No in-app purchases. • Fully offline. Works in basements, crawlspaces, and job sites with no cell signal. • No account required. No sign-in. No data collected. • Launches in under a second. Does math. Done. — TECHNICAL — Requires iOS 16.0 or later. iPhone only.