Page Yield Explained: ISO 19752, ISO 24711 and the 5% Coverage Rule

Quick answer: Page yield is a laboratory measurement taken under an international standard — ISO/IEC 19752 for mono toner, 19798 for color toner, 24711 for inkjet — printing a fixed test page until the cartridge is spent. It is a comparison number, not a promise about your documents. Read it the way you read a car's fuel economy figure.

That is not a criticism of the number. A standardised figure is the only thing that lets you compare two cartridges at all. It just has to be read for what it is, and the "5% coverage" phrase attached to it causes more confusion than anything else in this category.

The standards, briefly

What all of them have in common is that they remove the variables. The page is fixed. The print settings are the machine's defaults. Printing runs continuously rather than one page at a time. Testing is done across multiple cartridges and multiple printers, and the published figure is a declared value derived from those results rather than the best run anyone got. That is why two cartridges quoting ISO yields can be compared, and why a number quoted with no standard attached cannot be compared to anything.

What "5% coverage" actually looks like

Five percent coverage means roughly one twentieth of the printable area has marks on it. On a mono test page that is a page of ordinary text with generous margins and white space — a short letter, not a dense report.

So if your pages are heavier than that, you will get fewer pages than the label. Things that push coverage up:

• Bold headings, tables with rules and shaded cells, and anything with a background fill
• A logo or letterhead on every page
• Photographs, charts, and full-bleed images
• Small margins and tight leading — more text on fewer sheets is more toner per sheet

And on a color machine there is a second effect that surprises people: the 5% figure is per color. A page that uses all four colors draws on all four cartridges, so a "1,100 page" color set does not mean 1,100 pages of color-heavy work.

Why your real yield differs

• Coverage, as above. This is the dominant factor by a wide margin.
• Job pattern, on inkjets. The 24711 method prints in defined job sizes precisely because printing one page at a time triggers more head maintenance cycles than printing twenty. Frequent tiny jobs cost ink that never reaches paper.
• Quality settings. Draft or economy modes lay down less; best or photo modes lay down more.
• Power cycling. Some machines run a cleaning routine at power-on. A printer switched on and off around each job spends supplies on that routine.
• Duplex and paper. Two-sided printing halves your sheet count for the same number of pages, which changes cost per sheet but not cost per page.

The number that actually decides the purchase

Yield on its own tells you nothing about value. Price on its own tells you nothing about value. The only figure that combines them is cost per page:

Worked through with round numbers, so the arithmetic is visible: a $30 cartridge rated at 3,000 pages costs one cent per page, or $10.00 per 1,000 pages. A $20 cartridge rated at 1,500 pages costs 1.33 cents per page, or $13.33 per 1,000. The cheaper cartridge is the more expensive one to run — by a third.

This is also the correct way to compare a compatible cartridge with an OEM one. Comparing sticker prices flatters whichever cartridge happens to hold less. It is the same arithmetic that decides the standard-versus-XL question, which we work through separately in Standard vs high-yield (XL) cartridges.

How to read this on our listings

• Page yield is stored per variant, not per product. A standard and a high-yield version of the same cartridge have different yields, so a single product-level number would be wrong for one of them. Change the yield option and the figure changes with it.
• Cost per 1,000 pages is shown on the product page, calculated from the price and yield of the exact variant you have selected.
• The OEM comparison price is per variant too, so the saving you see is a like-for-like comparison rather than a standard cartridge measured against a high-yield one.

Ink bottles for tank-based printers are worth a special mention: their yields are an order of magnitude higher than cartridge yields, which is the whole proposition of that class of printer. If you have one, compare bottles to bottles — start from your own machine rather than the category, for instance the Epson EcoTank ET-2800 page, or pick it on the finder. Cartridge-based machines such as the HP OfficeJet Pro 9015e belong in a different comparison entirely; both live under Ink Cartridges.

How to estimate what you will actually get

1. Take a handful of documents you genuinely print and look at them honestly. Mostly text with white space is near the test page. Charts, images, and letterhead are not.
2. Assume a real-world yield materially below the rated figure for anything heavier than plain text. Any specific percentage would be an invented number, and we are not going to invent one — but plan for less, not more.
3. Compare cartridges using the rated figures anyway. They are measured the same way for everyone, so the ranking holds even when the absolute number does not.

Common questions

Is a compatible cartridge's stated yield measured the same way?

The ISO methods are public and vendor-neutral, so yields quoted against them are comparable across manufacturers. If a yield is quoted with no standard named at all, treat it as a marketing number.

My printer says 20% remaining. Is that 20% of the rated yield?

Gauges estimate rather than measure, and the estimate is calibrated to a usage pattern that may not be yours. Treat it as a prompt to order a spare, not as an accurate countdown.

Why is the drum's yield so much larger than the toner's?

A drum unit is an imaging component, not a consumable powder, and is designed to outlast several toner cartridges. Its life is counted in the same page units, which is why the two numbers sit side by side and look mismatched.