Quick answer: A standard 16 × 20 inch paint by numbers canvas with around 24 colors takes most people 15 to 30 hours, which works out to two to four weeks of relaxed evening sessions. A highly detailed design with 36 or more colors can take 40 hours or more; a set of mini paintings or a simple design with large sections can be done in a weekend. The time depends far more on the number of sections than on the size of the canvas, and the biggest time savers are painting one color at a time, doing large areas first, and setting up your space once instead of every session.
People ask this before they buy and again when they are halfway through and wondering whether they will ever finish. The honest answer is that it varies a lot, but in predictable ways. Here is what decides it, how to estimate a specific kit, and how to make the hours go further — without rushing what is supposed to be the relaxing part of your day.
What you will find in this guide
Typical times by kit type
| Kit | Typical total time | At one hour an evening |
|---|---|---|
| Set of six mini paintings (15 × 20 cm each) | 1–2 hours per mini, 6–12 total | One to two weeks |
| Simple design, 16 × 20 in, large sections | 10–15 hours | Two weeks |
| Standard design, 16 × 20 in, 24 colors | 15–30 hours | Three to four weeks |
| Detailed design, 36 colors, or a famous painting | 30–45 hours | Five to six weeks |
| Large canvas, 24 × 32 in, detailed | 45–60+ hours | Two months |
These are ranges from painters who work at a normal, unhurried pace. Fast painters halve them; people who enjoy the detail double them. Neither is doing it wrong.
What actually decides how long it takes
The number of sections, not the size of the canvas. A large canvas with a bold, simple design can be quicker than a small one full of tiny shapes. Every section costs roughly the same: pick up the right color, find the section, fill it, check the edge. A design with 2,000 sections takes about twice as long as one with 1,000, whatever the size.
The number of colors. More colors mean more switching, more rinsing, and more searching for the next section of that number. A 36-color kit is not fifty percent more work than a 24-color one, but it is noticeably more.
How detailed the subject is. Skies, water and fields are fast. Foliage, crowds, fur, lace and cityscapes are slow. Look at the picture: are the shapes big or small?
Second coats. Light colors over printed numbers usually need two coats. A design heavy in whites, creams and yellows takes longer than a dark one.
Your setup. Painting under good light, with the paints in order and the canvas at a comfortable angle, is easily twenty percent faster than squinting at a flat canvas on the kitchen table.
How to estimate a specific kit before you buy
You cannot count the sections from a product photo, but you can read it well enough:
- Look for large, flat areas. A design that is a third sky or water is a fast design.
- Count the colors. The product page lists them. Under 24 is quick, 24 is standard, 36 is a longer project.
- Check the subject against the slow list: foliage, crowds, fur, fine architecture, busy patterns. One of those adds a week. Two add two.
- Check the size. Bigger is not slower on its own, but a big canvas with a detailed design is the longest combination there is.
A quick rule: a floral bouquet on a 16 × 20 canvas with 24 colors is about three weeks of evenings. Use that as your yardstick and adjust up or down.
Sessions: how long, how often
Forty-five minutes to an hour is the session most people settle on, and there is a reason: concentration on fine sections fades after about an hour, and that is when mistakes creep in. Two shorter sessions in a day beat one long one.
Frequency matters more than length. Fifteen minutes every day keeps the picture in your head, keeps the paints fresh, and adds up to almost two hours a week without ever feeling like a commitment. A three-hour Sunday session once a fortnight loses that rhythm, and the lids stay open longer.
Stop at a natural point: the end of a color, or the end of a region of the picture. It makes the next session easier to start.
Ten ways to finish faster without rushing
- Paint one color at a time, across the whole canvas. Open one pot, paint every section of that number, close it. No rinsing, no searching for the next color, no drying-out.
- Start with the largest areas. Skies and backgrounds go fast and give you a sense of progress in the first hour, which is what keeps people going.
- Do the small sections last, once everything around them is dry. You are then only worrying about one edge, and slips can be covered.
- Work dark to light. Light colors need second coats anyway; painting them last means the second coat also tidies any dark edges.
- Use the right brush size. A big brush on a big area is three strokes instead of thirty. See our brush guide.
- Leave the canvas set up. An easel in a corner, or a board you can slide under the sofa, saves ten minutes of setup and packing every session. Our folding easel is made for exactly this.
- Keep the paints in number order in a holder rack. Hunting for pot 17 in a heap is where minutes vanish.
- Photograph the reference sheet on a phone and zoom in, rather than holding it up to the light.
- Get the light right. A daylight lamp means fewer errors and no leaning in to check.
- Do not aim for perfection on the first pass. Fill every section once, then go back for second coats and tidying. Two fast passes beat one slow one.
When slow is the point
All of the above is for people who want to finish. Plenty of painters do not, particularly, and that is the better reason to do this at all. If you find that an hour disappears and your shoulders have dropped, you have already got what the kit is for. A canvas that takes three months of quiet evenings is not a slow canvas; it is three months of quiet evenings. Our guide on painting for stress relief is about exactly that.
Frequently asked questions
How long does a 16 × 20 paint by numbers take?
Most people take 15 to 30 hours for a standard design with around 24 colors, spread across two to four weeks of evening sessions. Simpler designs are quicker; detailed ones with 36 colors take longer.
Can I finish a paint by numbers in one day?
A single mini painting, yes. A full canvas would need eight to twelve hours of continuous painting and would not be much fun. Two or three weekends is a more realistic fast finish.
Do larger canvases take longer?
Only if they are more detailed. Section count decides the time, not size. A large canvas with big, open sections can be quicker than a small one full of tiny shapes.
What is the fastest way to do paint by numbers?
One color at a time across the whole canvas, largest areas first, smallest sections last, with the paints in number order and the canvas left set up between sessions.
How long should one painting session be?
Forty-five minutes to an hour. Fine work gets sloppy after that. Short sessions every day beat long ones once a week.
Which kits are quickest for a beginner?
Sets of mini paintings, and single canvases with large open areas: sunsets, seascapes, big florals, single animals. See mini paintings and best sellers.
Pick a kit that fits your evenings
If you want a finished picture this month, choose a bold design or a set of mini paintings. If you want something to return to all winter, a famous painting or a detailed cityscape will keep you company. Either way, set the canvas up once, keep the lids closed, and let the hours be what they are.
