Rebar Cost Calculator

What rebar costs per stick, per pound and per ton

Rebar is sold three ways and the three prices look wildly different until you convert them. A home center sells by the stick, a rebar fabricator sells by weight, and a mill sells by the ton. Converting all three to dollars per pound puts them on one scale.

Start at retail. A grade 40 #4 bar, 20 ft long, lists at $14.33 at a big box store, dropping to $12.18 when you buy 50 or more (Home Depot product page, 2026). The same page gives the shipping weight as 13.36 lb, so the single stick price is 14.33 / 13.36 = 1.07 a pound, and the 50 stick price is 12.18 / 13.36 = 0.91 a pound. Neither is cheap, and both pay for cutting to length, handling and shelf space.

Bulk pricing sits well below that. Cost guides put plain steel rebar at $0.50 to $1.00 per pound, or $1,300 to $2,000 per ton, with $0.40 to $2.25 per linear foot across the common sizes (HomeGuide rebar price survey, 2026). By the piece, that survey lands near the big box number; by the ton, it lands near half.

Read the per foot column with care. A #7 bar costs more per foot than a #4 yet less per ton, because each foot carries more steel. That is the whole reason a per stick quote cannot be compared across sizes without weighing the bar.

Worked example: a 44 stick driveway order

A two car driveway slab takes 40 pieces of #4, 20 ft long, on a 12 in grid. Add 10 percent for laps and offcuts and you buy 44 sticks. That is 880 ft of bar, and at 0.668 lb per foot it weighs 587.84 lb, or 0.29 tons. Now price it at the 50 stick rate of $12.18.

• Material: 44 x 12.18 = 535.92
• Tie wire at $12 per ton: 0.29 x 12 = 3.53
• Delivery: 75.00
• Sales tax at 7 percent on goods: 539.45 x 0.07 = 37.76
• Placing labor at 6 hours and $65 an hour: 6 x 65 = 390.00

Add those lines and the order comes to 1,042.21, which is 1.77 per pound of steel and 1.18 per foot of bar. Material is barely half the bill; labor alone is 37.4 percent of it.

Change one input and the whole stack moves. Skip the delivery by hauling it yourself and the total drops to 967.21. Place it yourself over a weekend and the total falls to 652.21, which is close to the material cost plus tax. The calculator above runs any version of this in a keystroke, which is the point of pricing the job before you order.

Weight is the only common denominator

The ASTM A615 standard fixes the nominal weight of each bar size, and that table is what turns a linear takeoff into a purchase order. The rule of thumb is 2.67 x d x d pounds per foot, where d is the nominal diameter in inches. For a #4 bar, 2.67 x 0.5 x 0.5 = 0.668 lb per foot, which matches the published table to three decimals.

The weights are nominal and the standard allows a small rolling tolerance, so a truckload can weigh a percent or two off the table. For pricing that does not matter. For a truck scale ticket it can, and a supplier who bills by actual weight will use the scale, not the table.

Two conversions cover most estimates. A short ton of #4 bar is 2,000 / 0.668 = 2,994 ft, so a ton lays about 2,994 ft of that size. Going the other way, 1,000 ft of #5 weighs 1,043 lb, just over half a ton. Any quote in tons, pounds or sticks turns into the same number once the size is known, and the rebar weight calculator handles the mat version of this math with spacing included.

What a mill price leaves out

Market reports quote a mill basis price for straight bar, and that number is the floor of the stack, not the price you pay. Two 2026 figures frame it. Market research firms put the US rebar benchmark at about $1,036 to $1,042 per metric ton in the second quarter of 2026, which is roughly $940 to $945 per short ton. And the Bureau of Labor Statistics producer price index for fabricated bar joists and concrete reinforcing bars, series WPU1074051, stood at 408.0 in September 2026 against 313.8 a year earlier, a rise of 30.0 percent (BLS data via FRED).

That index is not a dollar price, but it explains why a quote from last fall looks impossible now. Steel priced at $100,000 in September 2025 would cost about $130,000 at September 2026 levels if the supplier tracked the index, which is 100,000 x 1.30 = 130,000. Bids held for 60 or 90 days carry real risk in a market moving that fast, so most fabricators either shorten the validity or add an escalation clause.

Coating is the wild card. Plain steel runs $0.40 to $1.25 per foot in the common sizes, while stainless bar reaches $9.00 per foot, and epoxy sits between them. On a driveway, plain bar is normal. On a seawall or a bridge deck, the coating premium can double the material line and is not optional.

Waste, laps and the count you end up buying

The takeoff gives the bar in the slab. The order gives the bar you carry home, and laps and offcuts sit between those two numbers.

A lap splice is the overlap where two bars meet to transfer load, and its length is set in bar diameters. A common tension lap is 40 diameters, so on a #4 bar the overlap is 40 x 0.5 = 20 in, or 1.67 ft. Every splice in a run adds that much bar, and a 40 ft run built from 20 ft sticks has one splice in it.

Offcuts come from cutting to fit. A 10 percent allowance covers a normal residential layout and is the number most crews use. A tight layout with many short pieces wants 15 percent.

Round up, not down, and never to a half stick. Suppliers sell whole bars, and a shortage on the morning of the pour costs a second delivery fee plus a wait. The extra four sticks cost $48.72, which is cheaper than any return trip.

The bar count also drives the accessory list. On a 12 in grid, a 20 ft by 40 ft slab needs about 300 chairs or a comparable number of dobies, and two rolls of tie wire. Those are small lines, and they still belong in the budget. The rebar material calculator derives the bar count from spacing and slab size if you are starting from the drawing rather than from a stick count.

Rebar or wire mesh for a thin slab

For a patio, a shed pad or a sidewalk, welded wire mesh is often the cheaper reinforcement per square foot. Sheets go down fast, overlap a few inches and need no tying, so both the material and the labor line come in under a comparable rebar mat. For a driveway that carries trucks, or anything structural, rebar wins on capacity per dollar and is what most codes and engineers specify.

The cost logic differs by job size. Mesh has a low unit price and almost no waste, so it suits small slabs with a short life. Rebar has a higher unit price, needs tying and chairs, and pays that back on any slab that must span or carry load. On the driveway example above, the labor line alone was $390, and that number barely changes whether the crew ties 44 sticks or rolls out four sheets.

A mixed detail is common in residential work: #4 bar at the perimeter and mesh in the field. That combination gets the load path where it matters and keeps the field cheap. Price both before you pick, and use the concrete reinforcing mesh calculator for the mesh side.

Mistakes that inflate a rebar bill

Five errors account for most of the money left on the table in residential rebar orders.

• Comparing stick prices across lengths. A 20 ft stick at $12.18 and a 40 ft stick at $22.90 look close, but the 40 ft bar carries twice the steel. Divide by pounds before you compare.
• Ordering the takeoff with no allowance. Laps and offcuts are real bar. A 10 percent allowance on this job is four sticks, and skipping it means a second trip.
• Holding a quote too long. The rebar index rose 30.0 percent in the year to September 2026. A quote with no expiry is either days old or not worth the paper.
• Buying grade 40 because it is on the shelf. ASTM A615 covers grades 40, 60 and 75, and structural drawings usually call for grade 60. Substituting a lower grade saves a few dollars and fails inspection.
• Forgetting freight and tax. On the worked example those two lines add $112.76, more than a tenth of the bill, and neither appears in a per stick price.

The fix is to price the whole order, not the bar: sticks with waste, weight, material, wire, freight, tax and labor. The calculator above does that in one screen, and the number it returns is the one to compare against a contractor's quote rather than the shelf tag.