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R/UNITED STATES

ASTM A615 Rebar Weight Chart (lb/ft and kg/m)

Weight per foot, kg/m, diameter and area for every ASTM A615 bar size from #3 to #18, with a calculator and Excel download.
Bar sizes
11
Range
#3–#18
lb/ft, d in inches
2.67 d²
Used in
United States
S-01/WEIGHT CHART11 SIZES

ASTM A615 bar sizes and weights

ASTM A615 rebar sizes and nominal weights
Bar sizeMetric sizeDiameter (in)Diameter (mm)Area (in²)Weight (lb/ft)Mass (kg/m)
#3#100.3759.50.110.3760.560
#4#130.50012.70.200.6680.994
#5#160.62515.90.311.0431.552
#6#190.75019.10.441.5022.235
#7#220.87522.20.602.0443.042
#8#251.00025.40.792.6703.973
#9#291.12828.71.003.4005.060
#10#321.27032.31.274.3036.404
#11#361.41035.81.565.3137.907
#14#431.69343.02.257.65011.380
#18#572.25757.34.0013.60020.240
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Nominal weights and areas as ASTM A615 defines each bar size. Delivered bars vary within the permitted tolerance.

S-02/CALCULATORFEET → POUNDS

ASTM A615 steel weight calculator

Enter each bar size with the number of bars and the length of each. The total updates as you type, with a summary by size.

  • 300.4 lb
Total steel

300.4 lb

= 136.2 kg · 0.150 short tons

Nominal mass only. Add laps, hooks and wastage for an order quantity; rolling tolerance means delivered weight can differ slightly from nominal.

S-03/READING THE SIZESASTM A615

How ASTM A615 bars are specified

ASTM A615 is the US specification for deformed and plain carbon-steel bars for concrete reinforcement, and the default rebar on American drawings. Grade 60 is the most common.

US bars are sized by number. For #3 to #8 the number is the diameter in eighths of an inch, so a #4 bar is 4/8 = 1/2 inch; from #9 up the number is only approximate, so a #9 bar is 1.128 inch. Soft-metric sizes use the diameter in millimetres, so #4 is also called #13.

ASTM A615 bars come in Grades 40, 60, 75 and 80, and Grade 100 in current editions, where the number is the minimum yield strength in ksi. Grade 60 is the default on most US drawings.

To estimate steel, multiply the total length of each bar size by its weight per foot, then add laps, hooks and a wastage allowance before ordering. Weights on a schedule are nominal; the bars delivered can come in slightly over or under.

The same chart for other standards: IS 1786, BS 4449 and AS/NZS 4671.

S-04/QUESTIONS5

#4 rebar weighs 0.668 lb per foot (0.994 kg/m). A 20 ft bar weighs 13.36 lb.

#5 rebar has a nominal diameter of 0.625 inch (15.9 mm). In soft-metric sizes it is called #16. It weighs 1.043 lb per foot.

Weight in lb per foot is about 2.67 × d², where d is the nominal diameter in inches. That is the bar's cross-section multiplied by the density of steel, 490 lb/ft³. For #4: 2.67 × 0.5² = 0.667 lb/ft. Multiply by the total length of bars to get the weight.

Yes. ASTM A615 defines each bar size by its nominal weight per foot and nominal area, and these are those values. Delivered bars can differ slightly within the permitted tolerance, so the weight on a mill certificate or delivery ticket may not match exactly.

20.86 lb. #5 rebar weighs 1.043 lb per foot, so a 20 ft bar is 20 × 1.043 = 20.86 lb, and a 40 ft bar 41.72 lb.
ARCHED / ESTIMATING

Need the full bar bending schedule?

A weight chart gives you the steel for one bar. A schedule needs every bar on the drawings: shapes, cutting lengths, laps and the totals by size. Send the reinforcement drawings and we return the rebar schedule in Excel, checked and signed off by an engineer.