Wall art size calculator
Measure once. Get the art size in inches and centimetres, and the exact height to hang it.
This wall art size calculator turns one measurement — your wall, sofa, bed, or console — into a recommended art size, in both inches and cm, plus the height to put the nail. It runs entirely in your browser using the standard interior-design proportions, which are written out in full further down the page so you can check the maths yourself. If you would rather read the rules than run the numbers, the companion wall art size and placement guide covers the same ground on one printable page.
Calculate your size
How the wall art size calculator works
Every number above comes from three conventions that interior designers and picture framers have used for decades. Nothing is proprietary and nothing is guessed — here they are in full, so you can run the same arithmetic on paper if you prefer.
When you ask for a pair or a trio, the calculator applies a fourth convention borrowed from gallery walls: leave 2 to 3 inches between frames and treat the whole cluster as a single shape. It sizes the cluster first, subtracts the gaps, then divides what is left between the pieces. That is why three prints across a sofa each come out narrower than you might expect — the gaps are part of the total.
The rules this calculator uses, in one table
If you want to sanity-check a result without opening the calculator, this is everything it does:
| Situation | Target art width | Where the centre lands |
|---|---|---|
| Over a sofa, bed, or console | 66–75% of furniture width | Bottom of frame 6–8 in above the furniture |
| Bare wall, nothing beneath | 60–75% of wall width | Centre 57–60 in from the floor |
| A pair or trio | Same total, minus 2–3 in per gap | Treat the group as one piece |
Wall art size over a bed or a sofa
These two are far and away the most common questions, so it is worth writing the answers out plainly. A king headboard runs about 76 inches wide, which puts the target at roughly 50 to 57 inches (128 to 145 cm) of art. A queen headboard is about 60 inches, giving 40 to 45 inches (102 to 114 cm). A standard sofa is about 84 inches, giving 56 to 63 inches (142 to 160 cm).
Two things trip people up here. The first is that most people buy too small — a 16 by 20 inch print over a king bed reads like a postage stamp, and no amount of good framing rescues it. The second is that the target is a total, not a per-piece size: a trio can hit 57 inches across where a single print would have to be enormous and expensive. Our bedroom wall art and large wall art ideas pages both work through this in more detail, and if you are leaning towards a grouping, the gallery wall ideas page covers spacing and layout.
Wall art sizes in cm and inches
Print sizes are sold in inches in the United States and in centimetres or A-sizes almost everywhere else, which makes cross-shopping confusing. To convert, multiply inches by 2.54 for centimetres, or divide centimetres by 2.54 for inches. The calculator above returns both automatically. These are the sizes you will actually find for sale:
| Inches | Centimetres | Best for |
|---|---|---|
| 8 x 10 | 20 x 25 | Shelves, gallery-wall corners, small accents |
| 11 x 14 | 28 x 36 | A single small wall, or one piece in a grouping |
| 16 x 20 | 41 x 51 | Above a nightstand, in a hallway, in a set |
| 18 x 24 | 46 x 61 | A statement piece on a medium wall |
| 24 x 36 | 61 x 91 | Over a sofa or bed, or a large empty wall |
| 30 x 40 | 76 x 102 | A single dominant piece on a big wall |
Note that A-sizes are not equivalents. A2 is 42 by 59.4 cm, or about 16.5 by 23.4 inches — close to an 18 by 24 inch print but not the same, so a frame cut for one will not fit the other.
When to break the rules
These are proportions, not laws. In a room where people are mostly seated — a dining room, a reading nook — drop the centre an inch or two to meet a seated eye line. With very high ceilings, going slightly larger than 75 percent reads better than the rule suggests, because the wall around the art is doing more work. And a piece you love at the wrong size still beats a piece you tolerate at the right one. Use the numbers to avoid the common mistake of buying far too small, then trust your eye. For choosing what actually goes on the wall, start with wall art ideas for every room.
Got your number?
Take the measurement with you — then browse the shop, or read the placement guide before you hang.
Visit the A Peaceful Spot shop Read the size guideWall art size calculator — FAQ
What size wall art do I need for my wall?
On a bare wall, fill about 60 to 75 percent of the wall width. On a 10-foot wall (120 in) that is 72 to 90 in of art. Above furniture, the furniture width governs instead, at two-thirds to three-quarters.
What size art goes over a king bed?
A king headboard is about 76 in wide, so aim for 50 to 57 in (128 to 145 cm) of art — one large piece, or a pair or trio spaced 2 to 3 in apart totalling that width.
What size art goes over a queen bed?
A queen headboard is about 60 in wide, so aim for 40 to 45 in (102 to 114 cm). A single 24 x 36 in print hung portrait, or two 18 x 24 in prints side by side, both land in range.
How high should wall art hang?
Centre it 57 to 60 in (145 to 152 cm) from the floor. Over furniture that is overridden by the gap rule: bottom of the frame 6 to 8 in above the sofa back or headboard.
How do I convert wall art sizes from inches to cm?
Multiply inches by 2.54. A 24 x 36 in print is 61 x 91 cm. The calculator returns both units, so you can shop either way.