Online Tool Store
Picture Hanging Calculator
Enter your frame's height, wire drop, and desired eye-level center to calculate exactly where the nail should go on the wall.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Nail height from floor
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How it works
- Measure your frame's height, how far the wire attaches from the top of the frame, and how much the taut wire sags below those attachment points.
- Enter your desired center height off the floor — 57–60 inches is a common gallery standard.
- The calculator works backward from the frame's top edge through the wire's geometry to tell you exactly where to drive the nail.
The formula
Frame top = Center height + Frame height ÷ 2
Nail height = Frame top − (Wire offset from top + Wire drop)
Example: a 24" frame centered at 60" has its top edge at 72". With the wire attaching 3" below the top and sagging 2" when taut, the nail goes at 72 − (3 + 2) = 67" from the floor.
FAQ
Why isn't the nail height just the desired center height minus half the frame?
Because the nail goes where the wire hangs from, not at the top of the frame. A taut wire sags below its attachment points on the frame, so the nail sits lower than the frame's top edge by the wire's offset from the top plus how much it sags when pulled taut.
How do I measure the wire's "drop"?
With the wire pulled taut (as it will be when hanging), hook a finger under the center of the wire and lift it up until it's tight, then measure the gap between the taut wire and the two points where it attaches to the frame's hardware. That gap is the drop.
What center height should I use?
Galleries and museums commonly center artwork around 57–60 inches from the floor (eye level for an average adult). Adjust lower for a room where the picture is mostly seen while seated, or to align with other art on the same wall.
How we compare
| Feature | Online Tool Store | Eyeballing it | Measuring tape + mental math |
|---|---|---|---|
| Accounts for wire sag, not just frame height | ✓ | ✗ | ✗ |
| Visual diagram of the geometry | ✓ | ✗ | ✗ |
| Free, instant | ✓ | ✓ | ✓ |
Eyeballing it is how crooked, off-center gallery walls happen; this does the actual wire-drop geometry so your nail lands exactly where the math says, the first time.