Quickly convert lengths, masses, areas, volumes, pressures, forces, densities and temperatures, with the units used in construction and metalwork.
Useful equivalents in metalwork and construction
1 inch = 25.4 mm. 1 kg = 2.2046 lb. 1 MPa = 1 N/mm². 1 kgf = 9.80665 N. 1 bar = 0.1 MPa. 1 kgf/cm² ≈ 0.0981 MPa. 1 psi ≈ 0.006895 MPa.
For steel, strength is usually given in MPa (N/mm²). For the weight of profiles and sheet use the weight calculator. Results are rounded to 6 decimals.
Frequently asked questions
How many mm in an inch?
One inch is exactly 25.4 mm.
How do I convert MPa to N/mm²?
They are equal: 1 MPa = 1 N/mm². No conversion is needed.
How do I convert kgf to N?
Multiply by 9.80665. 1 kgf = 9.80665 N.
How do I convert °C to °F?
°F = °C × 9/5 + 32. The calculator converts automatically, including kelvin.
How accurate are the results?
Exact or standard conversion factors are used and results show up to 6 decimals.
More tools: Deadline calculator · Annual leave · Overtime · VAT calculator · Currency converter · Name days · Public holidays · Working days · Salary calculator.