PerfectHang

About

Hang every picture at the perfect height - first time, every time.

PerfectHang is a free, browser-based calculator that removes every ounce of guess-work from mounting artwork, mirrors or posters. Tap in your wall dimensions, the size of your piece, choose a Wire, Hook or Bracket, and our live SVG guide shows exactly where to drill - down to the nearest millimetre.

The maths follows industry-recognised gallery standards (“57 in rule”) and automatically compensates for shelves, fireplaces, skirting or any obstructions that sit beneath. The calculation happens entirely in your browser, so once the page loads you can carry on even without an internet connection.

Tip: keep a tape measure and spirit level handy. PerfectHang gives the numbers, the steady hand is still yours!

1. Wall & Artwork

2. Obstruction & Method

3. Item & Fixings

How to use PerfectHang

  1. Person measuring wall height from floor to ceiling next to a sofa

    1. Measure the wall

    Use a steel tape and note the full height and width of the area where the piece will live. If the wall runs floor-to-ceiling behind a sofa, measure from the floor, not the cushion top.

  2. Person measuring the width of a framed artwork with a tape measure

    2. Add your artwork size

    Enter the frame’s outside height and width dimensions in centimetres.

  3. Illustration of a person crouching and measuring the height of a bookshelf with books and ornaments

    3. Measure any obstructions

    Is there a shelf, picture rail, fireplace mantel or other obstruction beneath the artwork? Record the height and width of that obstruction and tick “Include obstruction” in the form. PerfectHang will raise or centre your piece so it clears the obstacle while still following the 145 cm eye-level rule.

  4. Illustration of a person scratching his head while choosing between Wire, Hook and Bracket mounting options

    4. Pick a mounting method

    Choose Wire, Hook or Bracket. The calculator pre-loads the correct offset logic for each.

  5. Illustration of hands measuring a D-ring hook on the back of a picture frame with two rulers

    5. Measure your fixings

    Wire hang: measure the wire inset (gap from frame edge to wire anchor), the drill-bit hole diameter, and the offset from the top where the wire sits under tension.

    Hook hang: record the hook or D-ring item height & width, plus the hole diameter and offset from the top where the hook meets the frame.

    Bracket mount: measure overall item height & width, count the number of fixing points, note the bracket inset (gap from frame edge to side of the bracket), and enter drill-bit hole diameter and offset  (gap from the top of frame to top of the bracket).

  6. Illustration of a person pressing the Calculate button on a laptop showing PerfectHang’s drill-point diagram

    6. Tap Calculate

    The on-screen diagram updates in real time. Print it, or screenshot it on mobile, then mark the drill points using the XY measurements provided.

Gallery-grade tips

Why hang at 145 cm (57 in) on centre?

Museums from MoMA to the National Gallery and countless design pros set the centre of each artwork at roughly 145 cm / 57 in from the floor (The Spruce). That height aligns with average adult eye-level, so viewers neither crane upward nor tilt downward.

Maintaining a consistent centre-line also creates an invisible visual “horizon” that ties a whole wall – or an entire home – together (Apartment Therapy). Even eclectic gallery walls look ordered because every piece relates back to that shared eye-level baseline.

PerfectHang bakes the 57-inch rule into every calculation, then auto-adjusts if you enter a shelf or mantel below – so the result still feels balanced and natural.

Safety first: always check for wiring and pipes with a detector before drilling. Use fixings rated for the weight of your item and wall type. PerfectHang provides guidance only; final responsibility rests with the installer.