# Pressure Sensitive Label Web Width and Matrix Waste Calculator

> Source: https://netray.co/tools/pressure-sensitive-label-web-matrix-waste-calculator
> Publisher: Netray (netray.co), AI and integration engineering for ERP and manufacturing systems.
> Section: Free Tools

## Short answer

Compute the web width, repeat length and matrix waste for a label layout, then lineal feet, MSI, press time and material cost per 1,000 labels.

## Category

cost-finance

## Industry

Packaging & Converting

## Audience

- Label estimator
- Converting plant manager
- Customer service rep

## Tool

**Kind:** calculator

**Currency:** $

**Inputs:**

#### Label width (across the web)

**Key:** label_w

**Type:** number

**Default:** 4

**Min:** 0.1

**Step:** 0.0625

**Unit:** in

#### Label height (in the feed direction)

**Key:** label_h

**Type:** number

**Default:** 6

**Min:** 0.1

**Step:** 0.0625

**Unit:** in

#### Labels across

**Key:** across

**Type:** slider

**Default:** 3

**Min:** 1

**Max:** 8

**Step:** 1

**Unit:** labels

**Help:** Number of lanes on the web.

#### Gap between lanes

**Key:** gap_across

**Type:** number

**Default:** 0.125

**Min:** 0

**Step:** 0.0156

**Unit:** in

#### Gap between labels in the feed direction

**Key:** gap_down

**Type:** number

**Default:** 0.125

**Min:** 0

**Step:** 0.0156

**Unit:** in

**Help:** Die gap, often 0.125 in for rectangular labels.

#### Liner edge margin (each side)

**Key:** edge

**Type:** number

**Default:** 0.125

**Min:** 0

**Step:** 0.0156

**Unit:** in

#### Labels ordered

**Key:** qty

**Type:** number

**Default:** 50000

**Min:** 1

**Step:** 1000

**Unit:** labels

#### Press waste allowance

**Key:** waste_pct

**Type:** number

**Default:** 5

**Min:** 0

**Max:** 40

**Step:** 0.5

**Unit:** %

#### Material price

**Key:** price_msi

**Type:** number

**Default:** 0.45

**Min:** 0

**Step:** 0.01

**Unit:** $ per MSI

**Help:** MSI is 1,000 square inches of laminate, face stock plus adhesive plus liner.

#### Press speed

**Key:** speed

**Type:** number

**Default:** 150

**Min:** 1

**Step:** 5

**Unit:** ft/min

**Outputs:**

#### Web width needed (rounded up to 1/8 in)

**Key:** web_w

**Expr:** ceil((across * label_w + (across - 1) * gap_across + 2 * edge) * 8) / 8

**Format:** decimal

**Description:** Order or slit the next standard stock width at or above this.

#### Repeat length

**Key:** repeat

**Expr:** label_h + gap_down

**Format:** decimal

#### Matrix waste

**Key:** matrix_pct

**Expr:** (1 - across * label_w * label_h / (web_w * repeat)) * 100

**Format:** percent

**Primary:** true

**Description:** Share of web area that is not label.

#### Lineal feet to run

**Key:** lf

**Expr:** qty / across * repeat / 12 * (1 + waste_pct / 100)

**Format:** integer

#### Material consumed

**Key:** msi

**Expr:** lf * 12 * web_w / 1000

**Format:** decimal

**Description:** MSI, thousand square inches.

#### Material cost

**Key:** mat_cost

**Expr:** msi * price_msi

**Format:** currency

#### Material cost per 1,000 labels

**Key:** cost_per_m

**Expr:** mat_cost / qty * 1000

**Format:** currency

**Primary:** true

#### Press run time

**Key:** run_min

**Expr:** lf / speed

**Format:** minutes

**Description:** Run time only, excludes makeready and washups.

**Chart:**

#### Press run time vs labels across

**Type:** bar

**X:** across

**From:** 1

**To:** 8

**Steps:** 8

**Series:**

- run_min

**Disclaimer:** Estimate for rectangular labels with straight lanes. Round or irregular labels use a different matrix. Material prices vary by face stock, adhesive and supplier contract.

## Content

**Intro:** Label material is usually the largest cost in a pressure sensitive job, and the matrix you throw away is part of it. This calculator turns label size, lanes across and gaps into web width, matrix waste, lineal feet and material cost per thousand labels.

**Sections:**

#### How to use it

**Body:** Enter the finished label width and height, how many lanes you plan to run across, the gap between lanes and between labels in the feed direction, and the unprinted liner edge margin on each side. Add the order quantity, a press waste allowance and the laminate price per MSI. The tool returns the narrowest web width in eighth-inch steps, the repeat, matrix waste, lineal feet, MSI consumed and the cost per thousand labels. Try one to eight lanes and compare run time on the chart.

#### Formulas and units

**Body:** Web width equals lanes times label width, plus lane gaps, plus two edge margins. Repeat equals label height plus the gap in the feed direction. Matrix waste percent equals one minus the label area per repeat divided by web width times repeat. Lineal feet equal labels divided by lanes, times repeat in inches over 12, grossed up for waste. MSI equals lineal feet times 12 times web width, divided by 1,000. Press time is lineal feet divided by feet per minute.

#### Worked example

**Body:** A 4 by 6 inch label, three across, with 0.125 inch gaps and margins needs a 12.5 inch web, a 6.125 inch repeat and about 6 percent matrix waste. For 50,000 labels with 5 percent waste you run roughly 8,900 feet and consume about 1,340 MSI. At 0.45 dollars per MSI the material comes to about 12 dollars per thousand labels, and the press runs about an hour at 150 feet per minute.

#### Common mistakes

**Body:** Estimators often forget the lane gap, quote on label area instead of web area, or ignore that the next available stock width may be wider than the calculated web. Waste also differs for first-time jobs and repeats, and that allowance should reflect makeready, registration and die-cut trimming rather than a flat guess.

**Bullets:**

- Price material on the web consumed, not the label area
- Check standard stock widths before choosing lane count
- Add plate, die and finishing costs separately

**Cta:** If your label quotes depend on stock widths and prices held in an ERP, we can build an on-prem assistant that prices layouts against live item data.

**Faq:**

#### What is matrix waste in label converting?

**Answer:** Matrix is the waste web left after labels are die cut and stripped away. It includes gaps between lanes and labels plus the liner edges. Lower matrix means more of the purchased material ends up as sellable labels.

#### What is MSI?

**Answer:** MSI stands for thousand square inches. Label laminate is commonly priced per MSI, so multiplying the web width in inches by the length in inches and dividing by 1,000 gives the MSI consumed.

#### Why does the web width round up to 1/8 inch?

**Answer:** Stock rolls are slit to widths that are rarely perfectly equal to the layout. Rounding up to the next eighth inch gives a practical order width. Check your supplier for the actual standard widths.

#### Does this include roll diameter or labels per roll?

**Answer:** No. Use the label roll length and outer diameter calculator for finished roll specifications. This tool focuses on web layout, material consumed and cost.

## Search terms

label web width calculator, label matrix waste calculator, labels across web calculator, label material cost per thousand, pressure sensitive label estimating, label lineal feet calculator, MSI label material calculator, narrow web label estimating

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