Trade calculators
Works in your browser. Nothing is uploaded.Trade unit converter
Feet, inches and fractions to metric and back, areas to roofing squares, and lumber to board feet.
in
in
ft
Type it the way you’d write it: 5 ft 7 3/8 in, 5' 7-3/8", 67.375 in or 1.7 m.
Type the number and its unit: 1250 ft², 116 m², 12.5 squares or 2 acres.
Board feet use the nominal size lumber is sold by, like 2 × 6, and the length in feet.
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Unit converters
Trade unit converterFeet, inches and fractions, board feet, roofing squares.Volume converterGallons, litres, cubic feet and cupsWeight converterPounds, kilograms, ounces, stones and tonsTemperature converterFahrenheit, Celsius and KelvinSpeed convertermph, km/h, m/s and knotsTime converterSeconds, minutes, hours, days and weeksFuel economy convertermpg, L/100 km and km/LSlope converterDegrees, percent, 1 : n and pitchAngle converterDegrees, radians, gradians and DMSPressure converterpsi, bar, kPa and atmForce converterNewtons, kN, kgf and lbfTorque converterN·m, lbf·ft and lbf·inDensity converterkg/m³, g/cm³, lb/ft³ and lb/galFlow rate convertergpm, L/min, m³/h and cfmEnergy converterkWh, joules, calories and BTUPower converterhp, kW, W and BTU/hFrequency converterHz, kHz, MHz, GHz and rpmData storage converterMB, GB, TB, GiB and bitsLux and foot-candlesLux, kilolux and foot-candlesMagnetic field converterGauss, tesla, µT and mG
How to use it
- Pick what to convert
Length, area, or lumber in board feet.
- Type it as you’d write it
Mixed units and fractions work: 5 ft 7 3/8 in.
- Copy a result
Tap the copy button beside any unit.
Tips
- Fractions
Pick 1/8, 1/16 or 1/32 to match the tape you’re using.
- Roofing squares
One square covers 100 ft²; most shingles come three bundles to a square.
- Board feet
Use the nominal size lumber is sold by, like 2 × 6, for board feet.
In the app
Unit converter in Angle Meter
- Every kind of unit, from length to torque
- Pinned unit pairs and a conversion list
- Slope and angle from the phone’s tilt
- Voice commands
Get it onGoogle PlayComing soon to the App Store
Unit converter guide ›