Rebar cutting calculator: free cut list optimizer

Enter your bar schedule and stock lengths, and the calculator lays the pieces across stock bars so scrap is as small as possible. It solves the one-dimensional cutting stock problem, not a greedy fill: kerf is reserved on every cut, and offcuts longer than your threshold are credited back to the next job. You get cutting patterns, steel utilization percentage and the list of remaining stock.

Data current as of 2026-08-24

Open the calculator → Free, no sign-up · interface in Russian

Standards

Solves the Cutting Stock Problem for one-dimensional cutting of 11.7 m standard stock bars and custom lengths.

Input

Bar list: diameter, length, quantity. Stock bar length.

Output

Cutting patterns, utilization percentage, remnant schedule.

What it does

Optimization across all diameters and lengths in a single run
Usable remnants are credited toward the next cutting plan
Cutting pattern for every stock bar plus a steel summary
Utilization percentage, remnants, and scrap

The tool and the platform

The tool

Fully open

Cutting maps, yield, reusable offcuts and scrap
Multi-stock and several sizes in one run, GOST and EN grades
Welded splices for pieces longer than the stock bar, a piece from two offcuts
Offcut storage: Excel import and automatic posting after a run
Projects and storage stay on the server, XLSX export of the cutting maps and printing
Schedules of up to 5000 lines per run, works instantly, no sign-up required

Open the calculator →

ISKRIT·Rebar shop demo

By agreement

The work of a whole department: roles, history and modules linked together.

Bar bending schedule by structure with bending shapes
Shift task for the shop and marking tags for the pieces
Storage ledger: receipts, issues and returns of offcuts
Steel consumption by structure for a concreting date

See the platform demo →

Questions

Which stock bars are supported?

Standard 11.7 m bars and any custom length, including several stock sizes in the same run.

Are remnants accounted for?

Yes, usable remnants are credited toward the next cutting plan, and scrap is tallied separately.

What about bars longer than the stock?

The item is split into segments with a welded splice: a butt weld with no length loss, or a lap splice with a set allowance.

More in Construction site

Delivery route mapMaterial delivery scheme for the works execution plan: points, road and rail legs, distances and a PNG with the stage table.Steel profile cuttingPipes, angles, channels, I-beams: cutting maps, reusable offcuts, tonnage.Earthwork volumesCut and fill from survey points: TIN surface, contour lines, cut-fill map.Volume reconciliationClaimed vs design scope: over-claims, duplicates and out-of-scope items flagged at a glance.Bill of quantitiesEstimate lines into a clean bill of quantities: per-section subtotals and grand total.Cumulative log (KS-6a)Progress log with running totals: this period, to date, remaining and over-claims.

In the reference

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