tool steel square bar weight calculator
Enter the dimensions of a tool steel square bar and this works out its volume and weight. Nominal for the common cold-work grades (O1, A2, D2 sits nearer 7700).
- Weight of one square bar
- 4.9125
- Volume of one piece
- 625
- Weight per metre of length
- 4.9125 kg/m
- Density used
- 7860 kg/m3
Show the working
- Side = 25
- Length = 1000
- Number of pieces = 1
- volume_mm3 = 25^2 * 1000 = 625 000
- Volume of one piece = 625 000 / 1000 = 625
- Density used = 7860 = 7860
- Weight of one square bar = 625 000 * 7860 / 1e9 = 4.9125
- Total weight = 4.9125 * 1 = 4.9125
- Weight per metre of length = 625 000 / 1000 * 1000 * 7860 / 1e9 = 4.9125
Values are shown to six significant figures here; the arithmetic itself runs on exact fractions and is only rounded where a number is printed.
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The formula
- Volume = side^2 x length
- Weight = volume x density, with density = 7860 kg/m3
- One cubic millimetre of a material at 1000 kg/m3 weighs exactly one milligram, so the millimetre-to-kilogram step is a shift of the decimal point rather than a rounded factor.
Nominal for the common cold-work grades (O1, A2, D2 sits nearer 7700).
Dimensions are nominal. Mill tolerances on thickness, and the corner radii on formed sections, both move the real weight by a percent or two.
Every field takes inches or feet as readily as millimetres: change the unit next to it and the conversion is done exactly before the arithmetic starts.
Frequently asked
What is the density of tool steel?
7860 kg/m3, which is 7.860 g/cm3. Nominal for the common cold-work grades (O1, A2, D2 sits nearer 7700).
How do you calculate the weight of a tool steel square bar?
Volume = side^2 x length. Multiply the volume by the density of tool steel, 7860 kg/m3, taking care that both are in the same unit system.
Can I enter dimensions in inches?
Yes. Each dimension field has its own unit selector, and inch, foot, millimetre, centimetre and metre entries are all converted exactly before anything is multiplied.
Where the numbers come from
- Densities are nominal room-temperature values for the grade named, drawn from the usual mill and handbook figures.
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