Rebar reference chart
Rebar Size and Weight Chart (#3–#11)
U.S. rebar sizes and weights
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| Bar size | Nominal diameter (in) | Weight (lb/ft) | Cross-sectional area (in²) | Nominal diameter (mm) | Weight (kg/m) | Cross-sectional area (mm²) |
|---|---|---|---|---|---|---|
| #3 | 0.375 | 0.376 | 0.11 | 9.5 | 0.560 | 71 |
| #4 | 0.500 | 0.668 | 0.20 | 12.7 | 0.994 | 129 |
| #5 | 0.625 | 1.043 | 0.31 | 15.9 | 1.552 | 200 |
| #6 | 0.750 | 1.502 | 0.44 | 19 | 2.235 | 284 |
| #7 | 0.875 | 2.044 | 0.60 | 22.2 | 3.042 | 387 |
| #8 | 1.000 | 2.670 | 0.79 | 25.4 | 3.973 | 510 |
| #9 | 1.128 | 3.400 | 1.00 | 28.7 | 5.060 | 645 |
| #10 | 1.270 | 4.303 | 1.27 | 32.3 | 6.404 | 819 |
| #11 | 1.410 | 5.313 | 1.56 | 35.8 | 7.907 | 1,006 |
The bar numbers and customary values follow the FHWA reference table. Metric columns are direct conversions. Confirm the bar standard, grade, coating, and supplier data for your project.
Compare U.S. rebar sizes #3 through #11 by nominal diameter, weight per foot, weight per meter, and cross-sectional area.
How to use this chart
- Use the U.S. bar number when a drawing, quote, or material list specifies #3, #4, #5, and so on.
- Use weight per length to check a takeoff or convert a known bar length into mass; do not use this table to choose reinforcement size or spacing.
- 20 × 20 notation normally describes mesh spacing, not a single rebar size. Treat welded-wire mesh as a separate product and specification.
Sources and method
Reviewed:
Use this table to look up a U.S. bar number, nominal diameter, unit weight, or cross-sectional area. It is a reference lookup, not a reinforcement design.