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Rebar Weight Calculator (lb/ft, Total Pounds and Tons)
Rebar is bought and bid by weight. Enter the bar size, how many bars, their length and a waste allowance to get total pounds and tons for a quick check of a takeoff or a supplier quote.
Total length
2,000 ft
Total weight
1,402.8 lb
US short tons
0.701
Metric tonnes
0.636
How it is calculated
- Total length (ft) = number of bars × length per bar.
- Weight (lb) = total length × unit weight of the bar size (lb/ft, ASTM A615 nominal values).
- Waste/laps: the weight is increased by the waste percentage you enter.
- Tons = pounds ÷ 2,000 (US short tons). Metric tonnes = pounds × 0.000453592.
| Bar size | Nominal diameter (in) | Weight (lb/ft) |
|---|---|---|
| #3 | 0.375 | 0.376 |
| #4 | 0.500 | 0.668 |
| #5 | 0.625 | 1.043 |
| #6 | 0.750 | 1.502 |
| #7 | 0.875 | 2.044 |
| #8 | 1.000 | 2.670 |
| #9 | 1.128 | 3.400 |
| #10 | 1.270 | 4.303 |
| #11 | 1.410 | 5.313 |
| #14 | 1.693 | 7.650 |
| #18 | 2.257 | 13.600 |
FAQ
How much does #4 rebar weigh per foot?
#4 rebar (1/2 inch nominal diameter) weighs 0.668 lb per linear foot, so a 20 ft bar weighs about 13.4 lb.
How much does #5 rebar weigh per foot?
#5 rebar (5/8 inch) weighs 1.043 lb per linear foot; a 20 ft bar weighs about 20.9 lb.
How do I convert rebar pounds to tons?
Divide total pounds by 2,000 for US short tons. For metric tonnes, multiply pounds by 0.000453592.
What does the rebar size number mean?
In US imperial sizes the number is the nominal diameter in eighths of an inch up to #8 (#4 = 4/8 = 1/2 inch). Sizes #9 and above are based on equivalent areas of older square bars.