#11 rebar weight
5.313 lb/ft · 7.907 kg/m
#11 rebar has a nominal diameter of 35.8 mm (1.41 in) and a cross-sectional area of 1007 mm².
#11 rebar weight calculator
Weight of standard bar lengths
| Bars | 20 ft (lb) | 40 ft (lb) | 60 ft (lb) |
|---|---|---|---|
| 1 | 106.3 | 212.5 | 318.8 |
| 10 | 1,062.6 | 2,125.2 | 3,187.8 |
| 50 | 5,313.0 | 10,626.0 | 15,939.0 |
| 100 | 10,626.0 | 21,252.0 | 31,878.0 |
Bars per ton
| Bar length | Bars per short ton (2000 lb) |
|---|---|
| 20 ft | 18.8 |
| 40 ft | 9.4 |
| 60 ft | 6.3 |
One short ton of #11 rebar is 376 ft per short ton. Use this to turn a weight on a delivery note into a bar count.
How the weight is calculated
Area = π ÷ 4 × 35.8² = 1,006.6 mm². Weight per metre = area × 7850 kg/m³ = 1,006.6 × 10⁻⁶ m² × 7850 = 7.902 kg/m. In US units: 1.410² × 2.67 = 5.314 lb/ft.
Deformed bars and TMT bars are sold by nominal diameter and nominal mass; the ribs are already allowed for, and standards accept a small mass tolerance per bar. See the rebar weight formula guide.
#11 rebar per square foot of slab
Weight of #11 rebar in a slab or wall for common spacings, for one layer in one direction and for bars both ways. Add laps, hooks and chairs on top.
| Spacing (centres) | One direction (lb/ft²) | Both directions (lb/ft²) |
|---|---|---|
| 4 in | 15.94 | 31.88 |
| 6 in | 10.63 | 21.25 |
| 8 in | 7.97 | 15.94 |
| 10 in | 6.38 | 12.75 |
| 12 in | 5.31 | 10.63 |
| 18 in | 3.54 | 7.08 |
Compared with nearby sizes
| Bar | lb/ft | kg/m | vs this bar |
|---|---|---|---|
| #9 rebar | 3.400 | 5.060 | −36 % |
| #10 rebar | 4.303 | 6.404 | −19 % |
| #11 rebar | 5.313 | 7.907 | — |
| #14 rebar | 7.650 | 11.384 | +44 % |
| #18 rebar | 13.600 | 20.239 | +156 % |
Bars this heavy are used in heavily loaded columns, transfer beams, piles, bridge decks and large foundations. The nearest metric bar is 32 mm rebar (32 mm, 6.310 kg/m); in soft metric sizes #11 rebar is called No.36.
Frequently asked questions
What is the weight of #11 rebar per foot?
#11 rebar weighs 5.313 lb/ft (7.907 kg/m).
How much does a 20 ft bar of #11 rebar weigh?
106.3 lb (5.313 lb/ft × 20 ft). A 40 ft bar weighs 212.5 lb.
How many 20 ft bars of #11 rebar are in a ton?
About 19 bars per short ton (2000 lb), or 376 ft per short ton.
What is the metric equivalent of #11 rebar?
The nearest metric bar is 32 mm rebar (32 mm, 6.310 kg/m). In soft metric designation #11 rebar is also called No.36; it is the same bar. Check the steel area in the design before substituting one for the other.
How is the weight of #11 rebar calculated?
Area = π ÷ 4 × 35.8² = 1,006.6 mm². Weight per metre = area × 7850 kg/m³ = 1,006.6 × 10⁻⁶ m² × 7850 = 7.902 kg/m. In US units: 1.410² × 2.67 = 5.314 lb/ft.
How much #11 rebar is needed per square foot at 12 in spacing?
One layer at 12 in centres needs 5.313 lb/ft² in one direction, 10.626 lb/ft² for bars both ways, plus laps.
Other bar sizes
#3 rebar · #4 rebar · #5 rebar · #6 rebar · #7 rebar · #8 rebar · #9 rebar · #10 rebar · #14 rebar · #18 rebar
Full rebar weight chart · Steel weight calculator
Data adapted from Wikipedia, "Rebar" (CC BY-SA 4.0).