Metals Unit Converter
Convert between common machining and metals units. Length, weight, stress, density, temperature, and sheet metal gauge conversions built for machinists and engineers.
Last updated April 2026
Length
inches
mm
feet
meters
Weight
lbs
kg
oz
grams
Stress / Pressure
psi
MPa
ksi
GPa
Density
lb/in3
g/cm3
kg/m3
Temperature
F
C
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Frequently Asked Questions
How many mm is 1 inch?
1 inch equals exactly 25.4 millimeters.
How do I convert PSI to MPa?
Divide PSI by 145.038 to get MPa. For example, 10,000 PSI equals 68.95 MPa.