1D NESTING

Rebar and Steel Bar Nesting Calculator

Straight cut lengths for #3–#8 rebar, A36 flat bar and A500 tube: one group per size, 20 ft or 60 ft stock, drops you can rack.

Examples
Bars to buy32 bars
Material yield94.2%
Purchase cost$479.00
Saw cuts · kerf loss82 cuts · 10 1/4 in
Offcuts ≥ threshold7 reusable
Lower bound: 31 bars+1 vs lower boundExact search603' 0" of parts from 640' 0" of stock82 of 82 pieces placed

PieceKerfReusable offcutScrap, trim, miter wedgeStop mark

#4 Rebar19 bought · 0 from inventory · 92.1%

Bar 120 ft97.5% yielddrop 0' 5 5/8" · scrap
R4B-1 · 8' 0" · 90°/90°R4B-2 · 8' 0" · 90°/90°R4C-1 · 3' 6" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR4B-1R4B-2R4C-1

Stops 8' 0" · 16' 0 1/8" · 19' 6 1/4"

Bar 220 ft97.5% yielddrop 0' 5 5/8" · scrap
R4B-3 · 8' 0" · 90°/90°R4B-4 · 8' 0" · 90°/90°R4C-2 · 3' 6" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR4B-3R4B-4R4C-2

Stops 8' 0" · 16' 0 1/8" · 19' 6 1/4"

Bar 320 ft97.5% yielddrop 0' 5 3/4" · scrap
R4A-1 · 11' 6" · 90°/90°R4B-5 · 8' 0" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR4A-1R4B-5

Stops 11' 6" · 19' 6 1/8"

Bar 420 ft97.5% yielddrop 0' 5 3/4" · scrap
R4A-2 · 11' 6" · 90°/90°R4B-6 · 8' 0" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR4A-2R4B-6

Stops 11' 6" · 19' 6 1/8"

Bar 520 ft97.5% yielddrop 0' 5 3/4" · scrap
R4A-3 · 11' 6" · 90°/90°R4B-7 · 8' 0" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR4A-3R4B-7

Stops 11' 6" · 19' 6 1/8"

Bar 620 ft97.5% yielddrop 0' 5 3/4" · scrap
R4A-4 · 11' 6" · 90°/90°R4B-8 · 8' 0" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR4A-4R4B-8

Stops 11' 6" · 19' 6 1/8"

Bar 720 ft97.5% yielddrop 0' 5 3/4" · scrap
R4A-5 · 11' 6" · 90°/90°R4B-9 · 8' 0" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR4A-5R4B-9

Stops 11' 6" · 19' 6 1/8"

Bar 820 ft97.5% yielddrop 0' 5 3/4" · scrap
R4A-6 · 11' 6" · 90°/90°R4B-10 · 8' 0" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR4A-6R4B-10

Stops 11' 6" · 19' 6 1/8"

Bar 920 ft97.5% yielddrop 0' 5 3/4" · scrap
R4A-7 · 11' 6" · 90°/90°R4B-11 · 8' 0" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR4A-7R4B-11

Stops 11' 6" · 19' 6 1/8"

Bar 1020 ft97.5% yielddrop 0' 5 3/4" · scrap
R4A-8 · 11' 6" · 90°/90°R4B-12 · 8' 0" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR4A-8R4B-12

Stops 11' 6" · 19' 6 1/8"

Bar 1120 ft97.5% yielddrop 0' 5 3/4" · scrap
R4A-9 · 11' 6" · 90°/90°R4B-13 · 8' 0" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR4A-9R4B-13

Stops 11' 6" · 19' 6 1/8"

Bar 1220 ft97.5% yielddrop 0' 5 3/4" · scrap
R4A-10 · 11' 6" · 90°/90°R4B-14 · 8' 0" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR4A-10R4B-14

Stops 11' 6" · 19' 6 1/8"

Bar 1320 ft97.5% yielddrop 0' 5 3/4" · scrap
R4A-11 · 11' 6" · 90°/90°R4B-15 · 8' 0" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR4A-11R4B-15

Stops 11' 6" · 19' 6 1/8"

Bar 1420 ft97.5% yielddrop 0' 5 3/4" · scrap
R4A-12 · 11' 6" · 90°/90°R4B-16 · 8' 0" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR4A-12R4B-16

Stops 11' 6" · 19' 6 1/8"

Bar 1520 ft87.5% yielddrop 2' 5 3/8" · reusable
R4C-3 · 3' 6" · 90°/90°R4C-4 · 3' 6" · 90°/90°R4C-5 · 3' 6" · 90°/90°R4C-6 · 3' 6" · 90°/90°R4C-7 · 3' 6" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR4C-3R4C-4R4C-5R4C-6R4C-72' 5 3/8"

Stops 3' 6" · 7' 0 1/8" · 10' 6 1/4" · 14' 0 3/8" · 17' 6 1/2"

Bar 1620 ft87.5% yielddrop 2' 5 3/8" · reusable
R4C-8 · 3' 6" · 90°/90°R4C-9 · 3' 6" · 90°/90°R4C-10 · 3' 6" · 90°/90°R4C-11 · 3' 6" · 90°/90°R4C-12 · 3' 6" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR4C-8R4C-9R4C-10R4C-11R4C-122' 5 3/8"

Stops 3' 6" · 7' 0 1/8" · 10' 6 1/4" · 14' 0 3/8" · 17' 6 1/2"

Bar 1720 ft87.5% yielddrop 2' 5 3/8" · reusable
R4C-13 · 3' 6" · 90°/90°R4C-14 · 3' 6" · 90°/90°R4C-15 · 3' 6" · 90°/90°R4C-16 · 3' 6" · 90°/90°R4C-17 · 3' 6" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR4C-13R4C-14R4C-15R4C-16R4C-172' 5 3/8"

Stops 3' 6" · 7' 0 1/8" · 10' 6 1/4" · 14' 0 3/8" · 17' 6 1/2"

Bar 1820 ft87.5% yielddrop 2' 5 3/8" · reusable
R4C-18 · 3' 6" · 90°/90°R4C-19 · 3' 6" · 90°/90°R4C-20 · 3' 6" · 90°/90°R4C-21 · 3' 6" · 90°/90°R4C-22 · 3' 6" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR4C-18R4C-19R4C-20R4C-21R4C-222' 5 3/8"

Stops 3' 6" · 7' 0 1/8" · 10' 6 1/4" · 14' 0 3/8" · 17' 6 1/2"

Bar 1920 ft35.0% yielddrop 12' 11 3/4" · reusable
R4C-23 · 3' 6" · 90°/90°R4C-24 · 3' 6" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR4C-23R4C-2412' 11 3/4"

Stops 3' 6" · 7' 0 1/8"

#5 Rebar13 bought · 0 from inventory · 97.3%

Bar 2020 ft99.6% yielddrop 0' 0 3/4" · scrap
R5A-1 · 15' 5" · 90°/90°R5C-1 · 4' 6" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR5A-1R5C-1

Stops 15' 5" · 19' 11 1/8"

Bar 2120 ft99.6% yielddrop 0' 0 3/4" · scrap
R5A-2 · 15' 5" · 90°/90°R5C-2 · 4' 6" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR5A-2R5C-2

Stops 15' 5" · 19' 11 1/8"

Bar 2220 ft99.6% yielddrop 0' 0 3/4" · scrap
R5A-3 · 15' 5" · 90°/90°R5C-3 · 4' 6" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR5A-3R5C-3

Stops 15' 5" · 19' 11 1/8"

Bar 2320 ft99.6% yielddrop 0' 0 3/4" · scrap
R5A-4 · 15' 5" · 90°/90°R5C-4 · 4' 6" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR5A-4R5C-4

Stops 15' 5" · 19' 11 1/8"

Bar 2420 ft99.6% yielddrop 0' 0 3/4" · scrap
R5A-5 · 15' 5" · 90°/90°R5C-5 · 4' 6" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR5A-5R5C-5

Stops 15' 5" · 19' 11 1/8"

Bar 2520 ft99.6% yielddrop 0' 0 3/4" · scrap
R5A-6 · 15' 5" · 90°/90°R5C-6 · 4' 6" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR5A-6R5C-6

Stops 15' 5" · 19' 11 1/8"

Bar 2620 ft97.5% yielddrop 0' 5 3/4" · scrap
R5B-1 · 9' 9" · 90°/90°R5B-2 · 9' 9" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR5B-1R5B-2

Stops 9' 9" · 19' 6 1/8"

Bar 2720 ft97.5% yielddrop 0' 5 3/4" · scrap
R5B-3 · 9' 9" · 90°/90°R5B-4 · 9' 9" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR5B-3R5B-4

Stops 9' 9" · 19' 6 1/8"

Bar 2820 ft97.5% yielddrop 0' 5 3/4" · scrap
R5B-5 · 9' 9" · 90°/90°R5B-6 · 9' 9" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR5B-5R5B-6

Stops 9' 9" · 19' 6 1/8"

Bar 2920 ft97.5% yielddrop 0' 5 3/4" · scrap
R5B-7 · 9' 9" · 90°/90°R5B-8 · 9' 9" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR5B-7R5B-8

Stops 9' 9" · 19' 6 1/8"

Bar 3020 ft97.5% yielddrop 0' 5 3/4" · scrap
R5B-9 · 9' 9" · 90°/90°R5B-10 · 9' 9" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR5B-9R5B-10

Stops 9' 9" · 19' 6 1/8"

Bar 3120 ft90.0% yielddrop 1' 11 1/2" · reusable
R5C-7 · 4' 6" · 90°/90°R5C-8 · 4' 6" · 90°/90°R5C-9 · 4' 6" · 90°/90°R5C-10 · 4' 6" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR5C-7R5C-8R5C-9R5C-101' 11 1/2"

Stops 4' 6" · 9' 0 1/8" · 13' 6 1/4" · 18' 0 3/8"

Bar 3220 ft90.0% yielddrop 1' 11 1/2" · reusable
R5C-11 · 4' 6" · 90°/90°R5C-12 · 4' 6" · 90°/90°R5C-13 · 4' 6" · 90°/90°R5C-14 · 4' 6" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR5C-11R5C-12R5C-13R5C-141' 11 1/2"

Stops 4' 6" · 9' 0 1/8" · 13' 6 1/4" · 18' 0 3/8"

Buy list

  • #4 Rebar · 19 × 20 ft · $224.20
  • #5 Rebar · 13 × 20 ft · $254.80

Drops (offcuts)

  • Bar 1 · 0' 5 5/8" · scrap
  • Bar 2 · 0' 5 5/8" · scrap
  • Bar 3 · 0' 5 3/4" · scrap
  • Bar 4 · 0' 5 3/4" · scrap
  • Bar 5 · 0' 5 3/4" · scrap
  • Bar 6 · 0' 5 3/4" · scrap
  • Bar 7 · 0' 5 3/4" · scrap
  • Bar 8 · 0' 5 3/4" · scrap
  • Bar 9 · 0' 5 3/4" · scrap
  • Bar 10 · 0' 5 3/4" · scrap
  • Bar 11 · 0' 5 3/4" · scrap
  • Bar 12 · 0' 5 3/4" · scrap
  • Bar 13 · 0' 5 3/4" · scrap
  • Bar 14 · 0' 5 3/4" · scrap
  • Bar 15 · 2' 5 3/8" · reusable
  • Bar 16 · 2' 5 3/8" · reusable
  • Bar 17 · 2' 5 3/8" · reusable
  • Bar 18 · 2' 5 3/8" · reusable
  • Bar 19 · 12' 11 3/4" · reusable
  • Bar 20 · 0' 0 3/4" · scrap
  • Bar 21 · 0' 0 3/4" · scrap
  • Bar 22 · 0' 0 3/4" · scrap
  • Bar 23 · 0' 0 3/4" · scrap
  • Bar 24 · 0' 0 3/4" · scrap
  • Bar 25 · 0' 0 3/4" · scrap
  • Bar 26 · 0' 5 3/4" · scrap
  • Bar 27 · 0' 5 3/4" · scrap
  • Bar 28 · 0' 5 3/4" · scrap
  • Bar 29 · 0' 5 3/4" · scrap
  • Bar 30 · 0' 5 3/4" · scrap
  • Bar 31 · 1' 11 1/2" · reusable
  • Bar 32 · 1' 11 1/2" · reusable

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Examples

Rebar and steel jobs to start from

A two-size rebar schedule, a square-tube railing in fractions and a flat-bar picket job.

#4 and #5 rebar cut schedule

82 straight cuts on 20 ft bars. Buy #4 Rebar · 19 × 20 ft + #5 Rebar · 13 × 20 ft.

Bars
32
Yield
94.2%
Cost
$479.00
Cuts
82

ASTM A500 2" square tube railing

36 parts in fractions on 20 ft + 24 ft. Buy 8 × 24 ft + 1 × 20 ft.

Bars
9
Yield
97.6%
Cost
$1,017.60
Cuts
36

Flat bar pickets and rails

60 cuts on 20 ft flat bar. Buy 10 × 20 ft.

Bars
10
Yield
92.0%
Cost
$384.00
Cuts
60

How to use it

Nest a bar schedule in five steps

  1. Load the #4/#5 schedule or start new The preset groups two bar sizes on 20 ft stock in feet and inches. New job keeps your unit and clears the lists.
  2. One stock row per bar size Type the material name exactly, for example #4 Rebar, with 20 ft (or 60 ft) and the price per bar.
  3. Enter straight cut lengths Part mark, cut length such as 11' 6", quantity and the same material name. Bent bars go in at their developed straight length.
  4. Set kerf and the drop to keep 0 for a shear, 1/8" for an abrasive saw. Reusable if ≥ 12" or 24" decides which drops go back on the rack.
  5. Read one block per size The canvas draws a separate block for each bar size with its own purchase line, yield and drops.

Bar sizes

Rebar sizes #3–#8 and the lengths they come in

SizeNominal dia. (in)Dia. (mm)Weight (lb/ft)Soft-metricCommon stock
#30.3759.50.376#1020 · 30 · 40 · 60 ft
#40.50012.70.668#1320 · 30 · 40 · 60 ft
#50.62515.91.043#1620 · 30 · 40 · 60 ft
#60.75019.11.502#1920 · 30 · 40 · 60 ft
#70.87522.22.044#2220 · 30 · 40 · 60 ft
#81.00025.42.670#2520 · 30 · 40 · 60 ft
Nominal dimensions and unit weights from ASTM A615/A615M Table 1; stock lengths vary by supplier, 20 ft and 60 ft are the most common.

Groups

One nesting block per bar size

Bar 1 20 ft · 3 pieces · 97.5% · drop 0' 5 5/8" scrap

R4B-1 · 8' 0" · 90°/90°R4B-2 · 8' 0" · 90°/90°R4C-1 · 3' 6" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR4B-1R4B-2R4C-1

Bar 20 20 ft · 2 pieces · 99.6% · drop 0' 0 3/4" scrap

R5A-1 · 15' 5" · 90°/90°R5C-1 · 4' 6" · 90°/90°02'4'6'8'10'12'14'16'18'20 ftR5A-1R5C-1
First bar of each group in the preset: #4 and #5 never share a stock bar.

The material name is the group key. Every part named #4 Rebar goes into stock rows named #4 Rebar, and the same for #5. Each group gets its own lower bound too: here #4 Rebar 18, #5 Rebar 13 bars, against 19 and 13 bought.

Only straight cut lengths are nested. A bent bar goes in at its developed length from the bar list; this tool does not draw bend shapes, compute hooks or check placing requirements.

Purchase

20 ft vs 60 ft stock on the same schedule

StockBarsYieldCostWeight boughtReusable ≥ 12"
20 ft: #4 · 19 × 20 ft, #5 · 13 × 20 ft3294.2%$479.00525 lb7
60 ft: #4 · 6 × 60 ft, #5 · 5 × 60 ft1191.4%$506.40553 lb5
Same cut list, kerf 1/8"; 60 ft bars priced at three times the 20 ft bar (same price per foot). Weights use 0.668 and 1.043 lb/ft.

Long bars are not automatically cheaper. The schedule's long cuts, 15' 5" and 11' 6", leave short drops in a 20 ft bar, while a 60 ft bar ends with a longer leftover. At equal price per foot the 20 ft plan saves $27.40. If your supplier discounts mill lengths, type the real price and the comparison updates.

Drops and prices

Reusable drop threshold and price per bar

The drop threshold only changes grading, never the cut plan. At 12" the schedule leaves 7 reusable drops; raise it to 24" and 5 remain, the rest counted as scrap. Pick the length you would actually walk back to the rack for.

Enter prices per bar. For steel tube and bar, a quote per foot times the length works; for rebar sold by weight, multiply price per pound by weight per foot and length. The preset uses $11.80 for a 20 ft #4 bar and $19.60 for #5, so the buy list totals $479.00.

Where it fits

Who nests rebar and steel bar

Footings, slabs and walls

Straight bars from a placing drawing, cut on site from 20 ft stock with a portable shear or chop saw.

Precast and tilt-up yards

Repeat panel schedules where 60 ft mill lengths cut handling but leave longer end drops.

FAQ

Rebar and steel bar questions

Why is each rebar size its own group?

A #4 piece cannot be cut from a #5 bar. Give every stock row and part the same material name per size and the planner nests each size separately, with its own buy line, yield and drawing block. The preset buys 19 bars of #4 and 13 bars of #5.

Does it work out bends, hooks or laps?

No. It nests straight cut lengths only. Take the developed (straight) cut length of each bar from your bar list or detailer and enter that. Bend deductions, hook lengths, lap splices and code compliance stay with your engineer and placing drawings.

What kerf should I use for rebar?

Enter 0 for a hydraulic rebar shear or cutter-bender, which removes no material. An abrasive chop saw removes about 1/8" and a portable band saw about 1/16". The preset uses 1/8", so its 82 cuts lose 10 1/4" of bar.

Should I buy 20 ft or 60 ft bars?

Try both: change the stock length and the price, and compare. At the same price per foot, this schedule costs $479.00 on 20 ft bars and $506.40 on 60 ft bars, because the 60 ft plan leaves longer drops. Longer bars mean fewer pieces to handle and fewer end drops on long runs.

Which drops are worth keeping?

Many crews keep drops of 12" or 24" and longer for dowels, chairs and short bars. Set Reusable if ≥ to your rule: on the preset, 12" keeps 7 drops and 24" keeps 5. The rest are scrap and go to the recycler.

How do I turn a price per foot or per hundredweight into a price per bar?

Price per bar = price per foot × bar length, or price per pound × weight per foot × bar length. A #4 bar weighs 0.668 lb/ft, so a 20 ft bar is 13.36 lb; at $0.883 per lb that is $11.80 per bar, the preset price.

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