#6 Rebar — Diameter, Weight & Area
Deformed reinforcing bar per ASTM A615 / A706
#6 rebar (also written No. 6 or number 6 bar) is 3/4" — 0.75 inches (19.05 mm) — in nominal diameter; the "6" stands for 6/8 of an inch. It weighs 1.502 pounds per foot (2.235 kg/m) with a nominal cross-section of 0.44 in² (284 mm²). A standard 20 ft bar weighs 30 lb, a 40 ft bar 60.1 lb.
These nominal values (per ASTM A615) are what reinforcement schedules, quotes, and delivery tickets use — the deformations are already accounted for in the nominal diameter.
#6 rebar: nominal cross-section drawn to scale (3/4" = 19.05 mm, A = 0.44 in²)Size & Weight
| Nominal diameter | 0.75 in (19.05 mm) |
| Nominal area | 0.44 in² (284 mm²) |
| Weight | 1.502 lb/ft (2.235 kg/m) |
Ordering Numbers
| 20 ft bar | 30 lb |
| 40 ft bar | 60.1 lb |
| Bars per US ton (20 ft) | 66 |
Frequently Asked Questions
What is the diameter of #6 rebar?
3/4", i.e. 0.75 inches or 19.05 mm — bar numbers count eighths of an inch, so #6 is nominally 6/8".
How thick is #6 rebar?
Number 6 bar is 3/4" thick (19.05 mm). That is the nominal diameter: the ribs are already included, because the nominal size is defined by mass per foot.
How much does #6 rebar weigh per foot?
1.502 lb per foot (2.235 kg/m). A 20 ft bar weighs 30 lb; a US ton is about 66 such bars.
What is the area of #6 rebar?
The nominal cross-section of #6 is 0.44 in² (284 mm²) — the value reinforcement schedules use when summing required steel area.
What is the metric equivalent of #6 rebar?
The closest European size is Ø20 (20 mm, 2.47 kg/m, B500 per EN 10080). Matches are approximate — when substituting, match the required steel area, not the bar count.
What grade is #6 rebar?
Grade is independent of size: ASTM A615 Grade 40, 60, or 75 (yield in ksi), with Grade 60 the US default. A706 covers weldable low-alloy bars for seismic work.
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