# Print Job Makeready, Spoilage and Overs Calculator

> Source: https://netray.co/tools/print-job-makeready-spoilage-and-overs-calculator
> Publisher: Netray (netray.co), AI and integration engineering for ERP and manufacturing systems.
> Section: Free Tools

## Short answer

Find how many sheets to feed to deliver a good quantity after makeready, running spoilage and postpress waste.

## Category

manufacturing

## Industry

Packaging and Printing

## Audience

- Print estimator
- Production planner
- Press manager

## Tool

**Kind:** calculator

**Currency:** $

**Inputs:**

#### Good sheets required

**Key:** good

**Type:** slider

**Default:** 10000

**Min:** 500

**Max:** 50000

**Step:** 500

**Unit:** sheets

#### Colours or units on press

**Key:** colors

**Type:** number

**Default:** 4

**Min:** 1

**Step:** 1

**Unit:** units

#### Makeready sheets per colour

**Key:** mr

**Type:** number

**Default:** 150

**Min:** 0

**Step:** 10

**Unit:** sheets

**Help:** Sheets used to bring each unit to colour and register.

#### Running spoilage

**Key:** run_spoil

**Type:** number

**Default:** 3

**Min:** 0

**Max:** 50

**Step:** 0.5

**Unit:** %

**Help:** Waste during the run as a share of sheets fed.

#### Finishing spoilage

**Key:** post_spoil

**Type:** number

**Default:** 2

**Min:** 0

**Max:** 50

**Step:** 0.5

**Unit:** %

**Help:** Waste in cutting, folding, gluing or coating.

#### Sheet cost

**Key:** sheet_cost

**Type:** number

**Default:** 95

**Min:** 0

**Step:** 1

**Unit:** per 1000

**Outputs:**

#### Total makeready sheets

**Key:** mr_total

**Expr:** colors * mr

**Format:** integer

#### Run sheets needed

**Key:** yield_after_run

**Expr:** good / ((1 - run_spoil / 100) * (1 - post_spoil / 100))

**Format:** integer

**Description:** Sheets to feed through the run so that finishing still yields the good quantity.

#### Total sheets to order and feed

**Key:** feed

**Expr:** yield_after_run + mr_total

**Format:** integer

**Primary:** true

#### Waste sheets

**Key:** waste

**Expr:** feed - good

**Format:** integer

#### Waste as percent of feed

**Key:** waste_pct

**Expr:** waste / feed * 100

**Format:** percent

**Primary:** true

#### Cost of wasted stock

**Key:** waste_cost

**Expr:** waste * sheet_cost / 1000

**Format:** currency

**Chart:**

#### Waste percent vs good quantity

**Type:** line

**X:** good

**From:** 500

**To:** 20000

**Steps:** 40

**Series:**

- waste_pct

**Disclaimer:** Planning allowances only. Use your own measured makeready and spoilage by press and substrate.

## Content

**Intro:** Every print job starts with sacrificial paper and ends with some loss in finishing. This calculator shows how many sheets to feed to hit a good count, and why short runs carry a much higher waste percentage.

**Sections:**

#### How to use it

**Body:** Enter the good quantity you must deliver, the number of colours or units, makeready sheets per unit, running spoilage and finishing spoilage. Add a sheet cost to see the money tied up in waste. The result is the total sheets to order, the waste count and the waste percentage. The chart makes the point clearly: makeready is a fixed cost, so waste percent drops quickly as quantity rises.

#### The method

**Body:** Spoilage percentages apply to the sheets going through each stage, so they compound. To deliver G good sheets after finishing spoilage f and running spoilage r, you must feed G / ((1 - r) x (1 - f)) sheets through the run. Makeready sheets are added on top because they are consumed before the run starts. Waste is feed minus good. Do not simply add the percentages, since that understates the sheets required.

**Bullets:**

- Run sheets = good / ((1 - r) x (1 - f))
- Makeready = units x sheets per unit
- Feed = run sheets + makeready
- Waste % = (feed - good) / feed

#### Using it in quotes and ERP

**Body:** Estimators often keep a spoilage table by process and quantity band. Store those as planning values in the routing or item master so that work orders issue the right amount of stock. Review actual versus planned after each job. If waste is consistently above plan, look at colour matching time, plate or blanket issues, and substrate handling before simply increasing the allowance.

**Bullets:**

- Keep separate allowances for each process
- Update after reviewing actual issues
- Treat customer overs and unders per contract terms
- Separate makeready from running waste in reports

**Cta:** If you want planned versus actual stock issues per job in your ERP, we can help build that reporting.

**Faq:**

#### Why do the percentages compound?

**Answer:** Each loss applies to what is left after the previous stage. If you lose 3 percent in the run and 2 percent in finishing, the combined yield is 0.97 x 0.98, not 0.95, so you need slightly more stock than a simple add suggests.

#### How many makeready sheets are typical?

**Answer:** It varies widely by press, job complexity and automation. Modern presses with closed-loop colour can use far fewer than older ones. Use your own historical average per unit.

#### What about overs for customers?

**Answer:** Many contracts allow a tolerance on delivered quantity, often set by trade custom or terms. This tool targets a good count; add any contractual overs to the good quantity field.

#### Does it cover digital printing?

**Answer:** Yes if you set makeready and spoilage to the lower values typical of digital. Those presses have much smaller makeready, so waste percent stays low even on short runs.

## Search terms

print spoilage calculator, makeready sheets calculator, how many sheets to run for print job, print overs calculation, printing waste percentage, offset makeready waste, sheets needed for print run, finishing spoilage allowance

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