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Rebar Calculator

T8 Reinforcing Bar

Eurocode metric reinforcing bar — diameter 8.0 mm (0.315 in), cross-sectional area, mass per metre, and standard spacing options.

Diameter
8.0 mm
Area
50.3 mm²
Perimeter
25.1 mm
Mass per metre
0.395 kg/m

Area per metre width at common spacings

For slab or wall reinforcement specified as “T8@ spacing c/c” — the area provided per unit width at each standard centre-to-centre spacing.

SpacingAs (mm²/m)
T8 @ 100mm c/c503
T8 @ 125mm c/c402
T8 @ 150mm c/c335
T8 @ 175mm c/c287
T8 @ 200mm c/c251
T8 @ 250mm c/c201
T8 @ 300mm c/c168

Equivalent options at 150mm spacing

Every metric bar size at the same reference spacing, so you can see at a glance which other size lands near the same area per unit width as T8.

BarAs (mm²/m)
T6188
T8 (this bar)335
T10524
T12754
T141026
T161340
T202094
T253272
T284105
T325362
T408378
T5013090

Area and mass are computed directly from the nominal diameter (mass assumes standard steel density, 7850 kg/m³) — the same values the Rebar Calculator uses.

Open T8 in the Rebar Calculator →