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title: "Rebar Weight Calculator (EN 10080)"
description: "Rebar weight from nominal diameter and length ✅ EN 10080 nominal mass convention ⭐ 7.85 g/cm³ on the nominal section, disclosed not assumed."
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![Rebar Weight Calculator (EN 10080)](/images/uploads/631379c4-bff7-480e-9dc0-c76b6c22d9e3/rebar-weight-calculator-ribbed-reinforcing-bar-bundle-1920x1080.jpg)

Weight

# Rebar Weight Calculator (EN 10080)

Calculate reinforcing bar weight from nominal diameter and length. No density picker on purpose: EN 10080 defines rebar nominal mass at exactly 7.85 g/cm³. A real GET form: computes correctly with JavaScript off.

   Reinforcing bar Quantity

 Nominal diameter  mm

 Common sizes: 8, 10, 12, 16, 20, 25, 32 mm.

 Length  mm

 Stock bars are typically 6 000 or 12 000 mm.

Density is fixed at 7.85 g/cm³ — the EN 10080 nominal mass convention for reinforcing steel. The ribs are already included in the nominal cross-section.

  Calculate [Reset](/calculators/rebar-weight.md "Reset the calculator to its default values") Recalculates on submit — the same value renders with JavaScript off.

### Result

 Valid range

Total weight (× qty)**53.269 kg**

Weight per piece**5.327 kg**

Weight per metre**0.888 kg**

**m** = (π/4) × d² × L × 7.85 × 10⁻⁶

EN 10080 nominal mass: nominal cross-section × 7.85 g/cm³, exact π.

**Download as PDF** Result sheet · A4 Run a calculation first — then the sheet is ready to download.

Calculated on SteelEquivalents.com — send us the figures for a quotation.

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## Rebar weight — frequently asked

  Why can I not pick a steel grade here?

Because rebar mass is defined by standard, not by grade: EN 10080 fixes the nominal mass at 7.85 g/cm³ on the nominal cross-section for ALL reinforcing grades (B500A, B500B, B500C alike). A grade picker would imply a choice that does not exist.

  Do the ribs add weight on top of this result?

No — the nominal diameter is defined so that the ribbed bar's mass equals a plain round bar of that diameter. The ribs are already inside the nominal cross-section.

  How accurate is this against delivered weight?

This is the standard's nominal mass — invoices are settled on it. EN 10080 allows the actual delivered mass to deviate within a tolerance (±4.5% for ≤ 8 mm, ±6% above), so a weighed bundle may differ slightly.