Rebar Weight Calculator

Calculating rebar weight is essential for material procurement, cost estimation, structural loading calculations, and transportation planning. Rebar is typically sold by weight (per pound or per ton), so knowing the total weight of the reinforcement for a project is critical for accurate budgeting and ordering.

The weight of a rebar bundle depends on the bar size, length, and quantity. Larger bars weigh more per foot, and longer bars add more total weight. The calculator also provides bundle information, since rebar is typically shipped in bundles of approximately 4,000 pounds (2 tons).

This calculator supports all standard US rebar sizes from #3 through #18, with options for Grade 40, Grade 60, and Grade 75 steel. It provides results in pounds, kilograms, and tons, and includes cost estimates based on current market prices.

Rebar weight is calculated by multiplying the weight per foot by the total length of the bar. The weight per foot is determined by the bar's cross-sectional area and the density of steel (490 lbs/ft³):

The calculator includes all standard US rebar sizes with their properties:

Enter the following parameters to calculate rebar weight:

1. Bar Size: Select from #3 through #18, with metric equivalents shown.
2. Grade: Choose Grade 40 (280 MPa), Grade 60 (420 MPa), or Grade 75 (520 MPa).
3. Unit System: Select feet or meters for the bar length.
4. Bar Length: Enter the length of each bar in the selected unit.
5. Quantity: Enter the number of bars.

Results include single bar weight, total weight (lbs, kg, tons), total length, total steel area, bundles needed, and estimated material cost.

Rebar is typically shipped and stored in bundles weighing approximately 4,000 pounds (2 tons). The number of bars per bundle depends on the bar size and length:

• #4 bars at 20 ft: Approximately 300 bars per bundle (4,008 lbs)
• #5 bars at 20 ft: Approximately 190 bars per bundle (3,963 lbs)
• #6 bars at 20 ft: Approximately 130 bars per bundle (3,905 lbs)
• #8 bars at 20 ft: Approximately 75 bars per bundle (4,005 lbs)

The calculator determines the number of bundles needed based on the total weight and provides the bars per bundle for your specific bar size and length.

Rebar weight calculations are essential for structural engineers who must account for the self-weight of reinforcement in load calculations. Contractors use weight estimates for procurement, crane lift planning, and site logistics. Steel suppliers require weight-based orders for pricing and delivery scheduling.

Large projects may require hundreds of tons of rebar. Accurate weight estimates prevent under-ordering (which causes delays) and over-ordering (which wastes money and creates storage problems).