Rebar Weight Calculator
The Rebar Weight calculator shows your total weight in lb and kg from bar size, length, and count—plus an estimated cost if you enter a price per lb or per kg.
We let you pick a standard U.S. bar size (#3–#11, #14, #18), enter a stick length (ft) and number of pieces, and optionally a price. We compute per-foot unit weight by size, multiply by your length and count, convert to kilograms, and apply your price so you can budget or compare quotes quickly. We also include reference steps and FAQs below.
Pick a bar size, enter stick length (ft) and count. We compute total weight in pounds and kilograms using standard unit weights. Add an optional price per lb or per kg to estimate cost.
Unit weight auto-applies (lb/ft)
Common: 20, 30, 40 ft
Optional cost input below
We use standard U.S. deformed bar unit weights. For cut-length waste or ties/splices, add extra pieces as needed.
Results interpretation
How it works
Each U.S. bar size has a standard unit weight (lb/ft). We multiply by length and count, convert to kilograms, and optionally multiply by your price unit.
Formulas, assumptions, limitations
Unit weight. Looked up by bar size (e.g., #4 = 0.668 lb/ft, #5 = 1.043 lb/ft).
Per-piece weight. lb/ft × length (ft).
Total weight. Per-piece × count. Kilograms = pounds × 0.45359237.
Cost (optional). Total weight × price per lb (or per kg).
Rounding. Results shown to one or two decimals for readability.
Use cases & examples
Unit = 0.668 lb/ft → per piece = 13.36 lb. Total = 13.36 × 25 = 334.0 lb (≈ 151.5 kg).
Unit = 1.043 lb/ft → per piece = 31.29 lb. Total = 312.9 lb; cost ≈ 312.9 × $0.60 = $187.74.
Unit = 2.670 lb/ft → per piece = 106.8 lb. Total = 854.4 lb ≈ 387.6 kg; cost ≈ 387.6 × $1.30 = $503.88.
Rebar weight FAQs
Which bar sizes are supported?
Common U.S. sizes #3–#11 plus #14 and #18.
Why use length in feet?
Standard U.S. unit weights are in lb/ft. If you work in meters, convert length to feet first or use a $/kg price with our kg output.
Does the estimate include ties, laps, or waste?
No. Add extra pieces or length for splices, hooks, offcuts, and stirrups as required by your design and code.
Are weights exact?
They’re based on standard tables and are suitable for estimating. Mill tolerances and deformation patterns can vary slightly.
Can I price by ton?
Yes—convert price per ton to $/lb (1 ton = 2,000 lb) or $/kg (1 metric ton = 1,000 kg) and enter that value.
Rebar takeoff, simplified
Estimating reinforcing steel starts with weight. Suppliers quote by pound or kilogram, and freight often keys off total mass. With a standard unit weight per foot for each bar size, weight is straightforward—length times unit weight, times the number of pieces. From there, pricing is a single multiplication.
Where unit weights come from
U.S. deformed bar sizes (#3, #4, #5, …) map to nominal diameters. Each size has a published weight per foot that reflects the steel area and density. Our table follows common industry values so estimates line up with supplier quotes.
Planning for laps, hooks, and fabrication
Design details like lap splices, standard hooks, stirrups, and bends add length beyond “clear distance.” When you have a bar schedule, total length is the sum of straight segments and bend allowances. Add these before multiplying by unit weight.
Logistics and safety
- Bundle sizes: confirm bundle piece counts to streamline unloading and counting.
- Handling: plan equipment for heavy bundles; check lift capacities and rigging.
- Waste: keep a small overage for field changes and offcuts.
Controlling cost
Price depends on market steel costs, fabrication (cutting, bending, tagging), and delivery. Use our link-sharing to keep assumptions consistent when you request multiple quotes.