Unit Converter
Construction-focused unit conversions — length, area, volume, weight, temperature, and pressure.
12
Inches (in)
All conversions for 1 Feet (ft)
Conversions use exact or high-precision factors. Temperature uses exact °F/°C/K formulas. Area, volume, and weight factors derived from NIST standard values.
Frequently Asked Questions
How many cubic feet in a cubic yard?
27 cubic feet in one cubic yard (3 feet × 3 feet × 3 feet = 27). This is the most common conversion in concrete and excavation work.
How do I convert feet and inches to decimal feet?
Divide the inches by 12 and add to the feet. Example: 5 feet 6 inches = 5 + (6÷12) = 5.5 feet. For fractions: 5' 3-1/2" = 5 + (3.5÷12) = 5.292 feet.
How many square feet in an acre?
Exactly 43,560 square feet. One acre is also 4,840 square yards or approximately 0.405 hectares.
How do I convert PSI to kPa?
1 PSI = 6.895 kPa. For concrete strength, 3,000 PSI = 20.7 MPa (common residential spec), 4,000 PSI = 27.6 MPa (commercial spec).