Rebar Weight Chart — Metric Sizes Ø6–Ø40
Ribbed reinforcing bar B500 per EN 10080 / DIN 488
Nominal weight and cross-section for every metric rebar size from Ø6 (0.222 kg/m) to Ø40 (9.86 kg/m), plus the two numbers every order comes down to: what a 12 m bar weighs and how many bars make a tonne. Click a size for its full page with 6 m bars, meters per tonne, and US equivalents.
Metric rebar — Ø6 to Ø40
| Bar | d (mm) | A (mm²) | G (kg/m) | 12 m bar (kg) | Bars/tonne (12 m) |
|---|---|---|---|---|---|
| Ø6 | 6 | 28.3 | 0.222 | 2.66 | 375 |
| Ø8 | 8 | 50.3 | 0.395 | 4.74 | 210 |
| Ø10 | 10 | 78.5 | 0.617 | 7.4 | 135 |
| Ø12 | 12 | 113 | 0.888 | 10.66 | 93 |
| Ø14 | 14 | 154 | 1.21 | 14.52 | 68 |
| Ø16 | 16 | 201 | 1.58 | 18.96 | 52 |
| Ø20 | 20 | 314 | 2.47 | 29.64 | 33 |
| Ø25 | 25 | 491 | 3.85 | 46.2 | 21 |
| Ø28 | 28 | 616 | 4.83 | 57.96 | 17 |
| Ø32 | 32 | 804 | 6.31 | 75.72 | 13 |
| Ø40 | 40 | 1,257 | 9.86 | 118.32 | 8 |
Frequently Asked Questions
How do I calculate rebar weight?
Weight per meter = d²/162 with d in millimeters: 12²/162 ≈ 0.89 kg/m for Ø12. It comes from the nominal cross-section (πd²/4) times steel density 7,850 kg/m³ — the ribs are already included, because the nominal diameter is defined by mass.
What does B500 mean?
B = reinforcing steel, 500 = characteristic yield strength of 500 MPa. The suffix (B500A, B500B, B500C) grades ductility, with B the standard for most cast-in-place work and C required in high seismic zones. Dimensions and weights are identical across the three.
Why does delivered weight differ slightly from the table?
EN 10080 allows a mass tolerance of ±4.5% for Ø8 and larger (±6% below). Suppliers invoice by nominal weight from this table, so small scale differences on delivery are normal and expected.
How many bars are in a tonne?
Depends on the size: a tonne is 375 bars of Ø6 × 12 m, but only 8 bars of Ø40 × 12 m. The table lists the number for every size.
Values are entered from the governing standard’s published tables and cross-checked programmatically against its mass and section formulas before publication. Spotted an error? Write to advertising@metalabout.net — verified corrections ship within days. About