Free tool · Bright bar weight calculator
Steel weight, worked out before you ask.
Pick a section and grade, then fill any three of size, length, pieces and weight. We calculate the one you leave blank.
01Section
02Grade & condition7.85 g/cm³
03Fill any three
mm
mm
mm
mm
mm
pcs
kg
Fill any three fields to begin.
How the weight is calculated.
Weight = cross-section area × length × density × pieces. With sizes in mm, length in mm and density in g/cm³, weight in kg is:
Round bar
0.7854 × D² × L × ρ ÷ 10⁶Square bar
A² × L × ρ ÷ 10⁶Hexagon bar
0.866 × AF² × L × ρ ÷ 10⁶Flat bar
W × T × L × ρ ÷ 10⁶Example: an EN8 round bar, Ø 25 mm × 1 m, weighs 0.7854 × 625 × 1000 × 7.85 ÷ 10⁶ = 3.85 kg.
Densities used.
| Grade | g/cm³ |
|---|---|
| Carbon steels (EN1A, EN8, EN9, C45, 40C8) | 7.85 |
| Alloy steels (EN19, EN24, EN36, 20MnCr5) | 7.85 |
| EN31 / SAE 52100 | 7.81 |
| H13 tool steel | 7.80 |
| D2 tool steel | 7.70 |
| SS 303 | 7.90 |
| SS 304 | 7.93 |
| SS 316 | 8.00 |
| SS 410, SS 420, SS 431 | 7.70 – 7.75 |