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Engineering unit converter

Five quantities. Factors are exact SI conversions where a defined factor exists.

Quantity LengthForcePressurePowerTorque Value

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To

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Method

Foot = 0.3048 m. Pound-force = 4.4482216152605 N. Psi = 6894.757293168 Pa. Mechanical horsepower = 745.6998715822702 W. Kilogram-force uses standard gravity 9.80665 m/s².

How to read a conversion

The page multiplies by a fixed factor between the units named on the form. It is a unit change, not a calculation of a physical result. A length in millimetres and the same length in metres are the same distance.

The common failure is converting a derived unit as if it were a length. A stress in N/mm² is 1 MPa. A moment in kN·m is not a kilonewton times a millimetre until you divide by a thousand. The page converts the dimension you selected, not every dimension on a drawing.

Temperature differences and temperature points are not the same conversion. A 20 K difference is a 20°C difference. A point of 20°C is 293 K. Use the difference when the formula asks for a change.

Use it before a formula page when a drawing and a data sheet do not share a unit. It does not check the formula.

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Last checked 3 October 2026. Worked figures are scenarios. See methodology and the disclaimer.