Rebar Weight Chart — ASTM A615 (#3 to #18)
Nominal weights per linear foot and meter for standard US rebar sizes, with soft-metric equivalents and diameters.
| Bar Size (US) | Metric (soft) | Diameter (in) | Diameter (mm) | Weight (lbs/ft) | Weight (kg/m) |
|---|---|---|---|---|---|
| #3 | 10M | 0.375 | 9.5 | 0.376 | 0.560 |
| #4 | 13M | 0.500 | 12.7 | 0.668 | 0.994 |
| #5 | 16M | 0.625 | 15.9 | 1.043 | 1.552 |
| #6 | 19M | 0.750 | 19.1 | 1.502 | 2.235 |
| #7 | 22M | 0.875 | 22.2 | 2.044 | 3.042 |
| #8 | 25M | 1.000 | 25.4 | 2.670 | 3.973 |
| #9 | 29M | 1.128 | 28.7 | 3.400 | 5.060 |
| #10 | 32M | 1.270 | 32.3 | 4.303 | 6.404 |
| #11 | 36M | 1.410 | 35.8 | 5.313 | 7.907 |
| #14 | 43M | 1.693 | 43.0 | 7.650 | 11.384 |
| #18 | 57M | 2.257 | 57.3 | 13.600 | 20.239 |
Weights are the ASTM A615/A615M nominal values used by mills, fabricators, and estimators. To calculate the total weight of an order, multiply lbs/ft × length (ft) × number of bars, or use the Rebar Weight Calculator for a live number.
Bar sizes #3 through #11 are consecutive eighths of an inch (#4 = 4/8" = 0.500"). Sizes #14 and #18 skip in the sequence and correspond to 1¾" and 2¼" nominal diameters.
Frequently asked
What is the heaviest standard rebar size?
#18 (57M metric) at 13.60 lbs/ft — used for heavy foundations, bridge piers, and large columns. The lightest is #3 at 0.376 lbs/ft.
Why do some rows list a metric size like 13M?
Metric labels (10M, 13M, 16M...) are the ASTM A615M soft-metric equivalents. The bar is the same physical size — only the label differs.
Where does this rebar weight data come from?
ASTM A615/A615M Table 1 (nominal weights). Same values referenced in the CRSI Manual of Standard Practice.
