Nesting Efficiency Calculator
Calculate material utilization percentage and parts per sheet from part and sheet dimensions with kerf allowance.
Inputs
mm
mm
mm
mm
parts
mm
$
Results
Nesting Efficiency
96.7%
Parts per Sheet96
Waste3.3%
Sheets Needed6
Total Material Cost$510.00
Material Cost per Part$1.02
Total Parts Produced576
Excess Parts76
Scrap Area Per Sheet96.8
How to Use This Calculator
- Enter sheet dimensions (length x width in inches) and part dimensions (length x width).
- Set order quantity and minimum spacing between parts (inches).
- Review parts per sheet, sheets required, material utilization (%), and scrap rate.
- Optimize rotation angle -- many parts nest more efficiently at 45 or 90 degrees.
- True nesting software achieves 80-90% utilization; manual rectangular nesting typically hits 60-75%.
How the result changes with Sheet Width
| Sheet Width | Nesting Efficiency |
|---|---|
| 1,090 | 94.8% |
| 3,565 | 95.2% |
| 6,535 | 96.3% |
| 9,010 | 96.6% |
What each input means
- Sheet Length
- Standard sheet length (e.g., 2440mm for 4×8 ft sheet).
- Sheet Width
- Standard sheet width (e.g., 1220mm for 4×8 ft sheet).
- Part Length
- Length of the flat part blank.
- Part Width
- Width of the flat part blank.
- Order Quantity
- Number of parts needed.
- Kerf / Gap Allowance
- Material lost per cut (laser: 0.2-0.5mm, plasma: 2-4mm, shear: 0mm).
- Cost per Sheet
- Material cost per sheet.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersSheet Length = 2440, Sheet Width = 1220, Part Length = 200, Part Width = 150 = 7 input(s) provided
- Calculate Nesting EfficiencyNesting Efficiency96.7 = 96.7%
- Calculate Parts per SheetParts per Sheet96 = 96
- Calculate WasteWaste3.3 = 3.3%
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