Rebar Weight Calculator

Use this free rebar weight calculator to estimate pounds, tons, adjusted length, and weight per foot for common US rebar sizes.

All tools

Research-backed assumptions Formula steps Examples included Private in-browser use

Rebar sizeUS rebar size used for weight per foot. Example: #4 is about 0.668 lb per foot.Length per bar feetLength of one bar or cut piece in feet.QuantityHow many bars or pieces at that length.Waste percentExtra length for cuts, laps, layout changes, and damaged pieces.

Rebar weight176.352 lb

12 pieces of #4 x 20 ft

Adjusted length: 264 ft
Weight per foot: 0.668 lb/ft
US tons: 0.088176 tons

Nominal weights are planning values. Mill tolerances, coatings, bundles, laps, chairs, and structural design can change the final order.

Formula steps

Multiply length per bar by quantity.
Add waste for cuts and laps.
Multiply adjusted length by the nominal weight per foot for the selected bar size.

How to use the rebar weight calculator

Choose rebar size, then enter length per bar, quantity, and waste percent.
Press Estimate weight to see adjusted length, nominal weight per foot, pounds, and US tons.
For example, #4 rebar is commonly estimated at about 0.668 pounds per foot.
Weight helps with ordering and hauling, but bar size, spacing, laps, and cover need proper design.

Common uses

Estimate rebar weight for pickup or delivery planning.

Compare #3, #4, #5, and larger bars.

Add waste for cut lists and lap planning.

Convert total pounds to US tons.

Examples

#4 slab bars 12 bars, 20 ft each, 10% waste

176.352 lb

#5 footing bars 8 bars, 30 ft each

Rebar weight estimate

Waste check Increase waste percent

Adjusted length and weight

Frequently asked questions

Plain-language answers about when to use the tool, what it does with your inputs, what to double-check, and how privacy works.

When should I use the Rebar Weight Calculator?

Use it when your task matches one of these common needs: Estimate rebar weight for pickup or delivery planning. Compare #3, #4, #5, and larger bars. It works best when you already know the values, dates, units, or settings the page asks for.

What is the Rebar Weight Calculator doing with my inputs?

In plain language: The calculator multiplies length by quantity, adds waste, selects the nominal weight per foot for the rebar size, and converts total pounds to US tons. The examples on the page are there so you can compare your inputs with a filled-out calculation before copying the answer.

What do the main Rebar Weight Calculator inputs mean?

Rebar size: the US bar size, such as #4, used to choose nominal weight per foot. Length per bar: the length of one bar or cut piece. Quantity: how many bars or pieces at that length. Waste percent: extra length for cuts, laps, layout changes, and damaged pieces.

How should I read the Rebar Weight Calculator answer?

Read the headline estimate first, then check the material, waste, coverage, and unit lines. For project tools, the supporting lines are often the difference between a rough idea and a list you can actually shop from.

What should I double-check before trusting the answer?

Nominal weights are planning values. Mill tolerances, coatings, cut lists, laps, supports, bundles, and structural design can change the real order. Also check that you used the right unit, date, scale, or mode because small input changes can change the result.

What does #4 rebar mean?

#4 is a common US rebar size with a nominal diameter of about 1/2 inch and a planning weight of about 0.668 lb per foot.

Is rebar weight the same as rebar design?

No. Weight helps with ordering and hauling. Bar size, spacing, lap length, cover, and placement still need project-specific design.

Does the site save what I enter?

No. The calculator runs in your browser tab. Your recent answers stay only on the page while you use it, and they are not sent to a server.