10³ mm³
thousand cubic millimeters
Section modulusexact by definition
A thousand cubic millimetres is exactly 10⁻⁶ m³, or one cubic centimetre. It exists as a separate entry because that is how steel section tables print it: Canadian and British handbooks list the elastic and plastic section moduli of every rolled shape in 10³ mm³, so a W310x39 shows S as roughly 547 rather than 547,000.
Watch out: Numerically it is the cubic centimetre, and Eurocode section tables use cm³ for exactly the same values. A table headed 10³ mm³ and one headed cm³ carry identical numbers, which is worth knowing before converting something twice.
| 1 10³ mm³ | 1,000 mm³ |
Solvers that use section modulus