How Many Prints a Litre of Ink Actually Yields

Ink is sold by container size — a quart, a gallon, a litre — but a print job is measured in pieces. Somewhere between "I bought a litre of plastisol" and "I need to print 150 shirts" is a conversion most printers do roughly by feel rather than by working the actual numbers. It's worth doing once properly, because the answer depends a lot more on print size and ink type than intuition usually accounts for.

Starting from the container instead of the job

Most ink guidance works forward: given a job, how much ink do you need to buy? This is the same math run in reverse: given a container you already have, how many prints will it actually yield? The two questions use identical underlying physics — area, deposit thickness, and density — just applied in opposite directions.

A litre is a volume, 1000 cubic centimeters, regardless of what's inside it. To turn that into a print count, you need the ink's density (to convert the litre's volume into a weight) and the weight a single print actually uses (which depends on the print's area and the ink's typical deposit thickness). Divide the litre's total weight by the weight-per-print, and you get a raw yield before accounting for the ink that never makes it onto a garment.

Plastisol: a worked example

Plastisol runs close to 1.46 grams per cubic centimeter, so a litre weighs in at roughly 1,457 grams. For a 10×10 inch chest print at plastisol's typical wet deposit, a single print uses about 9.35 grams of ink. Divide 1,457 by 9.35 and a litre yields a theoretical 155 prints at that size — before any waste allowance. Once a realistic 15% waste allowance is factored in, the same litre realistically covers around 135 finished prints of that size, not 155.

Water-based and discharge: noticeably more prints per litre

Water-based and discharge ink share the same default deposit thickness and density in this model, and both come out to roughly 1.05 grams per cubic centimeter — a litre weighs about 1,054 grams, meaningfully lighter than plastisol's litre. Combined with a thinner default wet deposit (about 5.42 grams for the same 10×10 inch print, compared to plastisol's 9.35), a litre of either ink yields around 194 prints before waste, or about 169 after a 15% waste allowance — roughly 25% more usable prints than the identical litre of plastisol, for the identical print size.

This gap is worth remembering as a planning shortcut on its own: switching a job's ink from plastisol to water-based or discharge, with no other changes, gets you noticeably more prints out of the same volume of ink purchased, on top of any per-unit price difference between the two.

Print size changes the yield more than ink type does

Shrink the print from a 10×10 inch chest design to a 4×4 inch left-chest logo — about a sixth of the area — and the yield jumps dramatically. The same litre of plastisol, at 15% waste, covers roughly 844 prints at that smaller size instead of 135. Water-based or discharge ink at the same small size stretches even further, to roughly 1,053 prints per litre. Print area and print count are inversely related in a very direct way: a print with a sixth of the area uses roughly a sixth of the ink, which is exactly why yield jumped by close to that same factor between the two examples above. As a general rule, halving a design's linear dimensions quarters its area and roughly quadruples how many prints a given amount of ink will cover.

This is genuinely useful when quoting a job that mixes design sizes, or comparing two potential jobs against the ink you have on hand: a shop trying to decide whether an open litre of plastisol will stretch to cover a small-logo job doesn't need to guess, and doesn't need to run the full calculation from scratch every time — the relationship between print area and yield scales predictably once you've worked one example through properly.

Why the "before waste" number will always overstate reality

The raw yield figures above — 155 prints per litre for a 10×10 plastisol print, before waste — describe a scenario where every gram of ink in the container ends up on a finished garment, with nothing left behind in the screen, lost to mixing, or used on test pulls. That never happens in practice. A 15% waste allowance is a reasonable default for an experienced printer running a straightforward job; a beginner running a lot of test prints, or a job that needs several color-match attempts before the mix is right, should plan for more. Buying against the after-waste number, not the theoretical before-waste number, is the difference between a job that finishes cleanly and one that runs short with ten shirts left to print.

Deposit thickness is a default, not a law

Every figure above assumes the model's default wet deposit thickness for each ink — 0.1mm for plastisol, 0.08mm for water-based and discharge. Your actual setup may run thicker or thinner depending on mesh count and squeegee pressure: a lower mesh count and a softer blade generally lay down a heavier deposit than these defaults assume, which lowers your real yield per litre below the calculated figure, while a tighter mesh and firmer blade can push a thinner deposit and stretch a litre further than the default suggests. If you've weighed your own ink use on past jobs and know your actual deposit runs heavier or lighter than the default, adjust the yield estimate accordingly rather than trusting the generic figure — the same override that works for estimating how much ink a job needs works just as well in reverse for estimating how far a container will stretch.

Container sizes rarely match the math exactly

Ink isn't sold in exactly-one-litre-per-job quantities, and real containers come in whatever sizes a given supplier stocks — pints, quarts, half-gallons, gallons, or metric half-litres and litres. None of that changes the underlying math: a gallon is roughly 3.785 litres, so a gallon of plastisol yields somewhere near 3.785 times the per-litre figures above, before waste. What changes is the rounding problem at the edges. A job needing 150 chest prints doesn't map cleanly onto any standard container size in most ink lines, so you're almost always rounding up to whatever size covers the requirement with some margin, rather than buying the mathematically exact amount. Treat the yield-per-container figure as a planning tool for how many containers to order, not as a promise that a container will be used down to the last usable gram.

Planning ink for a multi-color job from yield

Yield estimates get more useful, not less, once a job has more than one color. A three-color design needs a separate yield calculation for each ink color and layer, since each color typically covers a different share of the print's total area — a small accent color covering 10% of the design area will use roughly a tenth of the ink a full-coverage base color needs for the same print count, all else equal. Working out roughly how many prints an existing partial container of each color will cover, color by color, before a job starts is a much better position to be in than discovering midway through a run that the accent color is about to run out while the base color still has plenty left.

Using this before you buy, not just after

The most useful moment to run this math is before ordering ink, not after opening a container and hoping it's enough. If a job needs roughly 150 chest prints in plastisol, working backward from the 135-prints-per-litre figure (after waste) tells you straightforwardly that one litre won't cover the job and a second container, even partial, will be needed — a much better position to be in before the job starts than discovering it with forty shirts left unprinted and a color that needs to be remixed and matched to what's already gone on the shirts before it. Rounding up to the next full container, rather than trying to buy the bare-minimum fraction of a litre, also avoids the batch-matching problem that comes with mixing a second small custom batch partway through a run.

Keeping the two directions of this math straight

It's worth being explicit that this is the same relationship covered from the other direction elsewhere on this site: estimating how much ink a specific job needs starts from the job and calculates a weight to buy, while this article starts from a container you already have and calculates how many prints it covers. Both use identical inputs — area, deposit thickness, density, and waste allowance — just solved for a different unknown. Once you're comfortable with one direction, the other is the same arithmetic run backward, not a separate thing to learn. An ink coverage calculator can run either direction — job-to-weight or container-to-print-count — and the full reasoning behind estimating a job's ink needs in the first place, including how to build your own deposit-thickness figures from logged jobs over time, is covered separately in how much ink you actually need for a print run.