Which Calculator Do You Need?
Every tool on this page solves the same underlying problem — converting where you want a frame to look like it hangs into where the nail actually goes — but each is shaped around a different situation. If you're hanging one frame on an open wall, the main calculator is all you need. Hanging several identical frames in a row or grid, use the Gallery Wall Spacing Calculator, which computes the gaps and margins as well as the nail positions. A collection of mixed sizes is the Salon Wall Calculator's territory.
The remaining tools handle specific complications: wide or heavy frames that need two or more hooks (Multi-Hook), art that must sit exactly centred between two boundaries (Art Centering), hanging above sofas, beds, and consoles where furniture sets the height (Above Furniture), buying a frame and mat for artwork you already own (Frame Size), fitting hanging wire correctly (Wire Length), and old houses where the floor itself slopes (Uneven Wall).
They share conventions: all heights measure from the floor up, all calculators accept millimetres, centimetres, or inches, every tool accounts for hook drop (what's that?), and everything runs in your browser — nothing you type leaves your device.