RFQ Tracker
Track quotations, due dates, customer communications, and RFQ status from one dashboard.
Coil Width Calculator
Calculate strip width from coil weight, OD, ID, and material density. Verify blank nesting, optimize slit widths, and validate material documentation.
Ready to Quote This Job?
After calculating material requirements, many manufacturers track RFQs, due dates, customer communications, and quotation status using the RFQ Tracker.
Manufacturing Workflow
Most manufacturing jobs follow a simple workflow: calculate material requirements, estimate costs, prepare quotations, and track RFQs. The tools below help manage each stage.
Related Manufacturing Tools
Continue your workflow with other free manufacturing calculators and tools.
Blanks Per Sheet Calculator
Calculate blanks per sheet, material utilization, yield, and scrap percentage.
Press Tonnage Calculator
Calculate press force for blanking, piercing, bending, and deep drawing operations.
Bend Allowance Calculator
Calculate bend allowance, bend deduction, outside setback, flat length, and K-factor for sheet metal bending.
Steel Weight Calculator
Calculate steel weight for plates, bars, pipes, tubes, angles, channels, and beams.
Coil Weight Calculator
Calculate coil weight from OD, ID, strip width, and material density.
Coil Thickness Calculator
Back-calculate strip thickness from coil weight, OD, ID, and width.
Coil Length Calculator
Determine total strip length from weight, thickness, and width.
Coil OD Calculator
Calculate outer diameter from weight, ID, width, and density.
Coil ID Calculator
Determine inner diameter for mandrel sizing and decoiler compatibility.
Material Cost Calculator
Calculate raw material cost, cost per part, scrap cost, and total batch cost for manufacturing.
Once material quantities and costs are calculated, the next step is managing customer RFQs, quotation deadlines, and communications. The RFQ Tracker helps organize the entire quotation process from enquiry to submission.
How to Calculate Coil Width
The coil width calculator uses: Width = Weight × 4e9 ÷ (π × (OD² − ID²) × Density). This back-calculates strip width from measurable coil parameters. While width is usually specified on documentation, this calculation serves as verification—confirming that weight, OD, ID, and width are internally consistent. Significant deviation indicates labeling errors or wrong coil identification.
The alternative from strip length: Width = Weight ÷ (Length × Thickness × Density). Both methods isolate width from the standard coil weight relationship. Use whichever inputs are available.
Width Selection for Blanking Operations
Choosing optimal coil width for blanking directly impacts utilization. Formula: Required Width = (Blank Dimension × Rows) + (Gaps × (Rows−1)) + (2 × Edge Trim). For three 100 mm blanks across with 2 mm gaps and 4 mm edge trim: Width = 300 + 4 + 8 = 312 mm. Ordering 315 mm provides tolerance margin with minimal waste.
Standard mill widths (1000, 1250, 1500 mm) cost less per kg but may produce more edge scrap. Custom slit widths add slitting cost but reduce waste. Calculate the breakeven volume where custom width savings exceed slitting charges—typically 50–100 tons annually for most parts.
Width in Slitting Operations
Slitting divides master coils into narrower mults. Master Width = ΣMult Widths + (Cuts × Kerf) + (2 × Edge Trim). A 1250 mm master slit into four 305 mm mults with 1 mm kerf and 3 mm edge trim: 4×305 + 3×1 + 2×3 = 1229 mm used of 1250 mm available. The 21 mm remainder becomes edge scrap. Our calculator verifies these relationships for procurement planning.
Frequently Asked Questions
How do you calculate coil width from weight?▼
Width = Weight × 4e9 ÷ (π × (OD² − ID²) × Density). When you know coil weight, OD, ID, and density, this formula solves for strip width.
What are standard coil widths in steel manufacturing?▼
Common widths: 600–2000 mm. Automotive: 900–1600 mm. Hot-rolled wide strip: up to 2000 mm. Slit coils can be as narrow as 10 mm.
Why is coil width important for blanking?▼
Width determines how many blank rows fit across the strip. Optimal width = (blank width × rows) + (gaps × (rows−1)) + (2 × edge trim). Maximizes utilization.
How does width tolerance affect production?▼
±1 to ±3 mm tolerance affects edge trim. If strip runs narrow, edge blanks may lack material. If wide, strip may not fit between die guide rails.
Can I calculate width from length and weight?▼
Yes. Width = Weight ÷ (Length × Thickness × Density). Works when length and thickness are known from mill certificates.
What width should I order for my die?▼
Required width = (blank width × rows across) + (inter-blank gaps × (rows−1)) + (2 × edge trim, typically 3–5 mm per side).
How is coil width measured?▼
Perpendicular to rolling direction using steel rule or laser gauge. Measure at multiple points—width varies ±0.5 mm along coil length.
Does width affect weight per meter?▼
Yes, linearly. Weight/meter = Width × Thickness × Density. Doubling width doubles weight per meter at same gauge.
What about master coil width vs slit widths?▼
Master width = sum of slit widths + (number of cuts × kerf loss, typically 0.5–1.5 mm per cut) + (2 × edge trim).
How does width selection impact cost?▼
Custom widths require slitting ($10–30/ton extra). But exact-width ordering reduces edge scrap. Calculate breakeven point for your production volume.