Cut List Optimizer – Linear Cutting Calculator

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Cut List Optimizer – Linear Cutting Calculator

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Free 1D Cutting Optimization Tool

Free Cut List Optimizer & Linear Cutting Calculator

Optimize cutting patterns for bars, rods, rebar, pipe, tube, timber, mouldings, steel sections and aluminium profiles. Use available stock first, calculate purchases, reduce true scrap and create clear workshop cutting instructions.

From calculation to workshop: enter stock → enter required pieces → optimize → print or share a branded cutting sheet. Reusable offcuts stay separate from scrap, and a shared link can reopen the exact plan.
1

Choose units & describe the material

Plain numbers use the selected unit. You can also type an explicit unit such as 6m, 6000mm, 20ft or 96in.

Project / job details (optional — shown on cutting sheets)
2

Enter stock lengths

Add lengths already in your yard and/or standard lengths available from a supplier. Set quantity to 0 for a purchase-only length.

3

Enter required pieces (cut list)

Give each piece type a short label. The same label and colour are used in the visual cutting plan.

Paste stock rows from Excel / CSV
Columns: length, available quantity, optional price. Tabs, commas or semicolons accepted.
Paste cut list from Excel / CSV
Columns: label, length, quantity. If label is omitted, A/B/C… is assigned automatically.
Advanced cutting & purchasing settings
Material removed by the blade/disc. Explicit units are accepted.
Total reserved end trim per used bar.
Leftovers at/above this length are reusable, not scrap.
Applied only to shortage bars that must be purchased.
This rule is always on for this calculator.

Your optimized cutting plan

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Bars used in cutting plan
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Bars to buy before buffer
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Finished-piece utilization
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True scrap rate
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Reusable leftover
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Bars to order incl. buffer
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Estimated order cost
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Physical cuts
Planning tool: verify dimensions, tolerances, cutting method and final schedule before fabrication. Optimization is heuristic and is not a mathematical proof of the global optimum.

1. What stock to use & what to purchase

Inventory is consumed first. The order quantity includes your selected purchase buffer.

2. Quick workshop cutting summary

Read each row as one instruction: take this stock length → use this many bars → make these cuts on EACH bar → keep or scrap the leftover.

3. Site cutting cards & visual cutting patterns

Each card tells the worker how many stock bars to take, what to cut from every bar, the total output and the leftover. Individual pattern cards can be downloaded and sent to the cutting team.

Reusable leftoverScrap leftoverKerfTrim allowance

4. Reusable offcuts to keep

These leftovers meet your reusable threshold. Keep them as labelled inventory instead of sending them to scrap.

5. Engineering & material breakdown

How this plan was calculated

    Share, print or send the exact cutting plan

    The share link stores the calculator inputs in the URL. Anyone opening it can see the same pre-filled plan and cutting patterns without retyping the stock or cut list.

    CTEvery cutting sheet and downloadable card is branded CalcTypes.com so the plan can be traced back to the calculator.
    Scan to open this exact plan
    Contents
    1. Cut list optimizer
    2. Stock & purchasing
    3. Quick workshop summary
    4. Site cutting cards
    5. Reusable offcuts
    6. Engineering breakdown
    7. Materials & how to use
    8. How the optimizer works
    9. Assumptions & limitations
    10. Questions people ask
    11. Sources

    Cut List Optimizer for Bars, Rods, Pipe, Tube, Timber & Linear Stock

    This free cut list optimizer is designed for one-dimensional cutting jobs where long stock must be divided into shorter pieces. It works as a linear cutting calculator, bar cutting calculator and practical cut list planner for steel bars, rebar, rods, pipe, tube, timber, mouldings, aluminium extrusion and similar profiles.

    Unlike a simple length calculator, it considers available inventory, purchasable stock sizes, blade kerf, trim allowance and reusable offcuts. The result is grouped into repeatable cutting patterns that can be printed, downloaded or shared with a workshop or site team.

    How to use the linear cutting calculator

    1. Enter stock lengths: add the full bars or lengths already available and any standard sizes you can purchase.
    2. Add the required cut list: enter each part name, piece length and required quantity.
    3. Set kerf and offcut rules: use realistic blade width, end trim and the minimum leftover worth keeping.
    4. Optimize the cut list: the calculator uses available inventory first, groups practical patterns and calculates any shortage to buy.
    5. Send the cutting plan: print a branded site sheet, download pattern cards, share by WhatsApp or copy a link that restores the exact inputs.

    Why reusable offcuts matter in cutting optimization

    A leftover is not automatically waste. If it is long enough to be useful on another job, this calculator records it as a reusable offcut and lists it separately from kerf, trim and small scrap. This makes the reported scrap rate more useful for estimating, purchasing and workshop control.

    How the Cut List Optimizer Works

    The calculator treats this as a one-dimensional cutting-stock problem. It groups identical required pieces, uses available stock before new purchases, accounts for kerf and trim, and groups identical layouts into repeatable workshop patterns.

    Reusable leftover is not counted as scrap. A remainder at or above your reusable threshold is reported separately so it can be returned to inventory.

    Assumptions & Limitations
    • Run incompatible materials, grades, diameters or profiles as separate plans.
    • For bent rebar, enter the approved developed cutting length from the BBS/drawing.
    • The optimizer uses a fast multi-strategy heuristic. A different arrangement may occasionally produce a lower theoretical waste or cost.
    • Actual fabrication may require extra tolerance for damaged ends, clamping, marking, re-cuts or process-specific constraints.
    • Prices are optional and do not include freight, taxes, fabrication labour or supplier minimum-order rules unless you include them in your own input.

    Questions People Ask About Cut List Optimization
    What is a cut list optimizer?
    A cut list optimizer arranges required piece lengths across available stock lengths to reduce unused material and show practical cutting patterns. This tool is for one-dimensional or linear stock rather than sheet nesting.
    What is a cut list?
    A cut list is the list of finished pieces required for a job, normally showing a part name or mark, its cutting length and the quantity needed. The optimizer uses that list to decide how the pieces should be grouped on full stock lengths.
    How do I optimize a cut list to reduce waste?
    Enter all usable stock sizes, realistic quantities, the complete required cut list and the actual kerf/trim values. The calculator then tests practical packing patterns, uses available inventory first and separates reusable remnants from true scrap.
    What materials can I use this calculator for?
    Any material that can be modelled as straight linear stock: steel bars, rods, rebar, pipes, tubes, aluminium extrusions, timber, mouldings and similar profiles. Do not mix stock that is not physically interchangeable.
    What is kerf?
    Kerf is the material removed by the cutting blade, disc or saw. Even a small kerf can become significant when many cuts are made, so the calculator includes it in the physical loss.
    What is the difference between offcut and scrap?
    An offcut is leftover material. If it is long enough to reuse, it remains useful inventory. Only leftovers below the threshold, plus kerf and trim loss, are treated as true scrap in this calculator.
    Why can quantity available be zero?
    A zero quantity tells the optimizer that you do not have that stock length in inventory, but it can still select the length for purchasing when “Can purchase?” is checked.
    Is the cutting plan guaranteed to be the global optimum?
    No. It uses a practical multi-strategy heuristic for fast browser-based planning. For very high-value or exceptionally large cutting-stock problems, an exact mathematical optimizer may find further improvements.
    🐞 Report an issue with this calculator

    If a result looks wrong, please include the stock list, cut list, kerf, trim and reusable-leftover threshold so the calculation can be reproduced.

    Name
    Email
    Please provide a reliable source or reference when reporting a calculation, formula, factual, or methodology issue.

    Important disclaimer

    This calculator provides planning estimates. Confirm the final cut schedule, stock specification, developed lengths, tolerances and safety/structural requirements with the responsible fabricator or engineer. Read the full disclaimer →

    Sources & Technical Background

    These references provide background for the optimization approach and the rebar/BBS context described on this page.

    1. Google OR-Tools — The Bin Packing Problem. Background on packing items into capacity-constrained bins while minimizing the number of bins used.
    2. Delorme, Iori & Martello — Bin packing and cutting stock problems: Mathematical models and exact algorithms, European Journal of Operational Research, 255(1), 2016. Review of one-dimensional bin-packing and cutting-stock models and exact methods.
    3. BSI — BS 8666:2020, Scheduling, dimensioning, bending and cutting of steel reinforcement for concrete. Relevant when developed rebar cutting lengths are taken from an approved reinforcement schedule/BBS.

    These are background references, not a claim that this browser calculator is certified by or affiliated with Google, Elsevier or BSI. The calculator uses its own practical heuristic and should be checked against project-specific fabrication requirements.