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Rebar Weight Calculator

Estimate the total weight of rebar needed, for costing or delivery planning, from total length and bar size.

Computed in your browser — nothing you enter is uploaded. Figures are presented for United States against IRC 2024, and every formula is cited under regulatory standards below.

Last verified 2026-08-25 · v1.0.0

Market
Imperial · sales tax
100 ft
Schematic, drawn to the proportions you entered — not to scale on screen.

Total rebar weight

66.8 lb

High confidence
Total length
100 linear ft

With the figures above, the total rebar weight comes to 66.8 lb. Note that total rebar length sits at the low end of the range this calculator was checked against, so treat the output as indicative rather than settled. This is calculated for United States and cites IRC 2024. Building in another market? Change the selector above so the units and code reference follow.

Estimated cost — your price

This site holds no price list for this material — local prices vary too much to publish honestly. Enter your supplier's price and the result is costed with it.

Preliminary estimate, not certified engineering. This tool produces an indicative quantity calculation for planning purposes only — it is not a certified structural analysis, a guaranteed material takeoff, or a substitute for building department approval. Always verify measurements on-site and have a licensed contractor or structural engineer review any load-bearing, code-sensitive, or safety-critical work before purchasing materials or starting construction. Spotted an arithmetic or standards error? Report it to contact@craftquantities.com with your inputs — confirmed fixes become pinned regression tests.

[Schema Verified] Computed in alignment with American Concrete Institute (ACI 318-19) formulas and International Residential Code (IRC 2024) spatial boundaries.

Regulatory standards & verification citations

  • Standard rebar weight per foot (ASTM A615): #3 = 0.376 lb/ft, #4 = 0.668 lb/ft, #5 = 1.043 lb/ft, #6 = 1.502 lb/ft

Your workspace

Most jobs need more than one number. Add the calculators you need next and they open right here, underneath this one — your figures stay on screen and nothing is lost to a page change.

Frequently asked questions

Why would I need total weight instead of just the piece count?
Suppliers often price and ship rebar by weight, and delivery trucks have weight limits — knowing total weight helps confirm pricing and logistics beyond just knowing how many sticks to buy.
Does this include the weight of tie wire or chairs (rebar supports)?
No — this is rebar weight only. Tie wire and rebar chairs are separate, much lighter accessory items typically estimated by piece count rather than weight.
Is epoxy-coated rebar a different weight than standard black rebar?
The coating adds a negligible amount of weight — for estimating purposes, use the standard bar-size weight regardless of coating type.