Unit Converter
Convert between units of length, weight, volume, temperature, pressure, and more.
Calculator
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Result: 3.280840 ft
Formula
Length: 1 m = 3.2808 ft = 39.3701 inch. Weight: 1 kg = 2.2046 lb = 0.001 tonne. Pressure: 1 bar = 14.504 psi = 100,000 Pa. Temperature: °C = (°F − 32) × 5/9.
Example calculation
6 inches to mm: 6 × 25.4 = 152.4 mm. 100 psi to bar: 100 / 14.504 = 6.895 bar. 350°F to °C: (350 − 32) × 5/9 = 176.7°C.
Engineering notes
India uses SI units (metres, kilograms, bar, °C) as the legal standard. US/UK drawings often use imperial units (inches, pounds, psi, °F). Double-check unit conversions before entering values into calculations — a single unit error can cause catastrophic design mistakes.
When to use this calculator
- Reading imported equipment datasheets in imperial units and converting to SI for Indian design standards
- Pipe dimensions — convert NPS (inches) to mm bore for piping calculations
- Pressure conversion — convert psi relief valve settings to bar for Indian standard documentation
- Temperature conversion — convert °F process temperatures on US P&IDs to °C for Indian instruments
- Material procurement — convert US tons to metric tonnes for steel or concrete ordering
Frequently asked questions
- What is the difference between a US ton, UK ton, and metric tonne?
- 1 metric tonne = 1,000 kg = 2,204.6 lb. 1 US short ton = 2,000 lb = 907.2 kg. 1 UK long ton = 2,240 lb = 1,016 kg. In India, "tonne" always means metric tonne (1,000 kg). In engineering documents, specify "metric tonne" or "MT" to avoid confusion, especially in import/export contracts where the difference matters for pricing and freight.
- What is the difference between bar, barg, bara, and psi?
- bar (bara) = absolute pressure, measured from absolute zero (perfect vacuum). barg = gauge pressure = absolute pressure − atmospheric pressure (1.01325 bar). psi = pounds per square inch (absolute). psig = pounds per square inch gauge. 1 bar = 14.504 psi. For process design: most pressures on P&IDs are gauge (barg/psig). For thermodynamic calculations (steam tables, gas laws), use absolute pressure.
- How do I convert between flow rate units?
- 1 m³/h = 16.667 L/min = 4.403 US gal/min (GPM) = 3.667 UK gal/min. 1 m³/s = 3,600 m³/h = 1,000 L/s. For gas flows: standard m³/h (Sm³/h or Nm³/h) at 0°C, 1.01325 bar (NTP) must be converted to actual m³/h at operating temperature and pressure using ideal gas law: V_actual = V_standard × (T_actual/273.15) × (1.01325/P_actual).