#7 rebar weight
2.044 lb/ft · 3.042 kg/m
#7 rebar has a nominal diameter of 22.2 mm (0.875 in) and a cross-sectional area of 387 mm².
#7 rebar weight calculator
Weight of standard bar lengths
| Bars | 20 ft (lb) | 40 ft (lb) | 60 ft (lb) |
|---|---|---|---|
| 1 | 40.9 | 81.8 | 122.6 |
| 10 | 408.8 | 817.6 | 1,226.4 |
| 50 | 2,044.0 | 4,088.0 | 6,132.0 |
| 100 | 4,088.0 | 8,176.0 | 12,264.0 |
Bars per ton
| Bar length | Bars per short ton (2000 lb) |
|---|---|
| 20 ft | 48.9 |
| 40 ft | 24.5 |
| 60 ft | 16.3 |
One short ton of #7 rebar is 978 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 × 22.2² = 387.1 mm². Weight per metre = area × 7850 kg/m³ = 387.1 × 10⁻⁶ m² × 7850 = 3.039 kg/m. In US units: 0.875² × 2.67 = 2.047 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.
#7 rebar per square foot of slab
Weight of #7 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 | 6.13 | 12.26 |
| 6 in | 4.09 | 8.18 |
| 8 in | 3.07 | 6.13 |
| 10 in | 2.45 | 4.91 |
| 12 in | 2.04 | 4.09 |
| 18 in | 1.36 | 2.73 |
Compared with nearby sizes
| Bar | lb/ft | kg/m | vs this bar |
|---|---|---|---|
| #5 rebar | 1.043 | 1.552 | −49 % |
| #6 rebar | 1.502 | 2.235 | −27 % |
| #7 rebar | 2.044 | 3.042 | — |
| #8 rebar | 2.670 | 3.973 | +31 % |
| #9 rebar | 3.400 | 5.060 | +66 % |
Bars of this size are typical main reinforcement for beams, columns, footings and retaining walls. The nearest metric bar is 20 mm rebar (20 mm, 2.470 kg/m); in soft metric sizes #7 rebar is called No.22.
Frequently asked questions
What is the weight of #7 rebar per foot?
#7 rebar weighs 2.044 lb/ft (3.042 kg/m).
How much does a 20 ft bar of #7 rebar weigh?
40.9 lb (2.044 lb/ft × 20 ft). A 40 ft bar weighs 81.8 lb.
How many 20 ft bars of #7 rebar are in a ton?
About 49 bars per short ton (2000 lb), or 978 ft per short ton.
What is the metric equivalent of #7 rebar?
The nearest metric bar is 20 mm rebar (20 mm, 2.470 kg/m). In soft metric designation #7 rebar is also called No.22; it is the same bar. Check the steel area in the design before substituting one for the other.
How is the weight of #7 rebar calculated?
Area = π ÷ 4 × 22.2² = 387.1 mm². Weight per metre = area × 7850 kg/m³ = 387.1 × 10⁻⁶ m² × 7850 = 3.039 kg/m. In US units: 0.875² × 2.67 = 2.047 lb/ft.
How much #7 rebar is needed per square foot at 12 in spacing?
One layer at 12 in centres needs 2.044 lb/ft² in one direction, 4.088 lb/ft² for bars both ways, plus laps.
Other bar sizes
#3 rebar · #4 rebar · #5 rebar · #6 rebar · #8 rebar · #9 rebar · #10 rebar · #11 rebar · #14 rebar · #18 rebar
Full rebar weight chart · Steel weight calculator
Data adapted from Wikipedia, "Rebar" (CC BY-SA 4.0).