A standard 16x20 in (40x50 cm) paint by numbers kit takes about 10 to 12 hours to finish with 24 colors, and 14 to 16 hours with 36. That's roughly two weeks of weekday evenings at an hour a night. The largest custom canvas with the most colors runs to 45–50 hours — a project for a whole winter.
Everything below is an estimate. Two people with the same kit will finish hours apart, because hand speed, breaks and how carefully you treat the edges all vary. But the ranges hold well enough to plan around.
Hours by Canvas Size and Color Count
| Canvas size | 24 colors | 36 colors | 48 colors |
|---|---|---|---|
| 16x20 in (40x50 cm) | 10–12 h | 14–16 h | 18–20 h |
| 20x20 in (50x50 cm) | 12–15 h | 17–20 h | 22–25 h |
| 20x28 in (50x70 cm) | 18–22 h | 24–28 h | 30–35 h |
| 28x40 in (70x100 cm) | 30–35 h | 38–42 h | 45–50 h |
Ready-made kits are 16x20 in, in a 24-color or 36-color version, so the first row covers them. The other sizes and the 48-color option are custom kits made from your own photo.
What Sets the Time
Three things, in order of how much they matter.
Canvas size. A 28x40 in canvas has three and a half times the surface of a 16x20 in, but the sections are larger too, so the time roughly triples rather than quadruples.
Color count. Each step up — 24 to 36, 36 to 48 — adds several hours on the same design. More colors means smaller sections and more switching between pots, and each switch costs a rinse and a minute.
Detail and background. A single subject on a calm background is the quick end of any row in the table. The same subject in front of foliage, a crowd or a lit city sits at the slow end, or beyond it. This is the variable the table can't show, and the one that surprises people most.
Can You Finish a Paint by Numbers in One Day?
A 16x20 in kit with 24 colors, yes — if you give it most of a day and your hand holds out. In practice it rarely goes that way. The first hour is slow while you find the rhythm, small sections need a steadier hand as you tire, and paint needs to dry where sections touch.
A better plan for the same kit is four to six sittings of two hours. The canvas comes out cleaner and you don't end the day with a cramped hand.
An Hour a Night, Measured Against Real Life
The American Time Use Survey for 2025 puts the average American's leisure time at about five hours a day, with two and a half of those in front of the TV. Taking one hour out of that block for the canvas gives you:
- A 16x20 in, 24-color kit in about two weeks of weekday evenings.
- A 16x20 in, 36-color kit in about three weeks.
- A 20x28 in custom canvas in five to six weeks.
- A 28x40 in, 48-color custom canvas in nine to ten weeks — the length of a winter.
Weekend afternoons compress any of those.
Picking a Kit by How Long You Want It to Last
Turn the question around: decide how much time you want to spend, then choose the kit.
A weekend project: 16x20 in, 24 colors, a design with a plain background. Our guide to a kit you'll actually finish shows how to spot one from the product image.
A month of evenings: 16x20 in with 36 colors, or a custom canvas at 20x20 in. A portrait or a dense scene at this size lands here; what makes a kit slow explains why.
A whole season: the largest custom canvas at 28x40 in with 48 colors, from a photo with plenty of detail. Nothing else in the range lasts as long, and the finished piece is sized to match.
A last thing the table doesn't say: the hours aren't the cost of the kit. They're the point of it.
