How do you calculate good capacity on a web line?

Multiply output per cycle by available cycles for gross capacity, then multiply by uptime and first-pass yield. Here 4 x 480 = 1920 gross, and 1920 x 0.90 x 0.97 = about 1676 good units.

What is the difference between downtime loss and yield loss?

Downtime loss is the units you never made because the line was stopped (192 units here). Yield loss is the units you made but scrapped for defects (about 52 units here). They need different fixes.

What is a good first-pass yield for web converting?

Strong flexo and coating lines run 95% and above; the 97% used here is very good. Below 90% first-pass yield usually points to registration, tension, or coating-weight problems worth a focused project.

Why is downtime loss larger than yield loss in this example?

At 90% uptime versus 97% yield, the line loses more capacity to stops than to scrap, so 192 units vanish to downtime against only 52 to defects. That tells you changeover and reliability, not print quality, is the priority.

How is web waste different from simple scrap percentage?

A flat scrap percentage only captures units you made and threw away. Web waste also counts the capacity you lost by not running at all, giving a fuller picture of total lost output.

How do I improve good web capacity?

Raise uptime by cutting changeover and unplanned stops, and raise first-pass yield by tightening registration and tension control. Because uptime is the weaker number here, uptime gains will move good capacity the most.

Printing, Labels & Industrial Converting calculator

Web Waste Calculator

Web Waste models how many good units a web-fed press or converting line actually delivers once downtime and defects eat into gross capacity. It starts from output per cycle and available cycles, then derates for uptime and first-pass yield to expose exactly how much is lost to stops versus scrap. Production managers and CI engineers in flexo, gravure, and coating operations use it to separate the two biggest loss buckets so they know where to focus. On a web line, a point of downtime and a point of yield loss cost very differently to fix, and this calculator makes that split visible.

What this calculator does

Estimate web waste for printing, labels and industrial converting using production-ready inputs so teams can confirm whether capacity can cover demand before committing the schedule.
Use it when web waste in printing, labels and industrial converting is being asked to take on more work and you need to know if there is room.
It multiplies output per cycle by available cycles for gross capacity, then applies uptime and first-pass yield to get good capacity, and reports the downtime and yield losses separately.

Formula used

Gross web waste capacity = web waste output per cycle × available web waste cycles
Good web waste capacity = gross capacity × expected web waste uptime × expected web waste first-pass yield

Inputs explained

Good units per press cycle:
Available press cycles in the window:
Expected web uptime:
Expected first-pass yield:

How to use the result

Use it when you need to see whether stops or scrap are the bigger drag on a web line's good output.
It treats uptime and yield as independent multipliers, so it will not model cases where a defect is what caused the stop or where losses compound in unusual ways.

Current U.S. benchmarks

The producer price index for paperboard and containers stands at 276.831 (BLS, May 2026), up 8.8% from a year earlier. Quotes priced off last quarter's material cost miss this move.
The U.S. has 22,301 printing and related support establishments employing about 386,248 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate good capacity on a web line? Multiply output per cycle by available cycles for gross capacity, then multiply by uptime and first-pass yield. Here 4 x 480 = 1920 gross, and 1920 x 0.90 x 0.97 = about 1676 good units.
What is the difference between downtime loss and yield loss? Downtime loss is the units you never made because the line was stopped (192 units here). Yield loss is the units you made but scrapped for defects (about 52 units here). They need different fixes.
What is a good first-pass yield for web converting? Strong flexo and coating lines run 95% and above; the 97% used here is very good. Below 90% first-pass yield usually points to registration, tension, or coating-weight problems worth a focused project.
Why is downtime loss larger than yield loss in this example? At 90% uptime versus 97% yield, the line loses more capacity to stops than to scrap, so 192 units vanish to downtime against only 52 to defects. That tells you changeover and reliability, not print quality, is the priority.
How is web waste different from simple scrap percentage? A flat scrap percentage only captures units you made and threw away. Web waste also counts the capacity you lost by not running at all, giving a fuller picture of total lost output.

Last reviewed 2026-05-12.