help and notes

picture hanging measurements
picture hanging measurements

Input what you need to, choose the results you want

There are many ways to hang pictures depending on fastening methods available, personal preferences, tools and equipment. Hangcalc can help in various scenarios and for different personal methods or processes. Everything can be done with a pencil, tape measure and spirit level (ideally one with a measurement scale on it).

Hang your artwork accurately using these calculators. The main calculator is for horizontal row layouts. Use solo to install works one by one in any position. Use horiz to calculate horizontal spacings and for vertical groups use vert button. To complete a calculator generally three or four measurements may be needed for each artwork:

  • vertical:
    1) outer vertical height
    2) drop to fastener(s)

  • horizontal:
    1) outer horizontal width
    2) inside adjustment to fasteners (if using more than one)

A work's center point (mid-line alignment height) is generally suggested to be 57 inches or 1450 mm high. Spacing between works will be closer in clustered works - perhaps 3 inches or 80 mm, but wider to expansive layouts.

At home I often place a work by "feeling" with "yes, it feels right just there". For that there are two main ways to determine fastener positions:

1) mark a corner (top or lower edge) and measure from there

  • hold a work against the wall where you want it to be and using a pencil mark the wall where a corner is. Measure how high that corner mark is
  • complete solo calculator fields using the corner height as the "reference height" then read out vertical and horizontal results, ie. for top edge or lower edge (depending on which corner) with "to previous edge" being zero
  • measure vertically up or down from the corner mark to fastener height, and then measure horizontally from there to the center or first/second fastener and mark

2) mark a vertical centerline position and measure from there

  • decide where you want the work's centerline to be, eg. half way between two points or to one side (maybe using golden ratio (length/phi) and using a pencil mark the wall where the centerline will be
  • hold the work against the wall and mark the height of the top or lower edge. Measure how high that mark is
  • complete solo calculator fields using the marked height as the "reference height" then read out fastener height result, ie. for top edge or lower edge (depending on which edge)
  • measure vertically up or down through the centerline mark to fastener height, mark that point and then place fastener; or measure horizontally from that point if using two fasteners

Groups and plans

If hanging groups of works, they can be laid out in front of the wall on the floor then arranged and rearranged until the set feels right. Maybe so that no one piece dominates and there is an appealing distribution of content, colors and tones etc. and good distances between works. After that, do a sketch on paper with key parameters, like target heights, centerlines, inter-work and end spaces, if and as required. These will set the key points for use in one or more calculator: horiz for horizontal spacings and for vert for vertical groups. The main calculator is for horizontal row layouts with a common alignment height. Note that when using the main calculator one or more work positions might be a vertical group - this is easily accommodated by using vert with the widest work used as the horizontal width for that position.

You might also proceed to hang works one by one using solo, and being in a group, add a "to previous edge" distance for horizontal spacing. Alternatively, work details can be gathered in advance using the template provided and the whole group layout planned on paper, including heights, widths and fastener locations. This scenario might also use "to previous fastener" horizontal option. These locations can then be transferred onto the wall. It may also be useful to use painter's tape to mark key points for groups, such as section widths and key alignment heights to help with the transfer.

Just complete inputs you need, eg. for horizontal or vertical measurements, then choose the results you want.

Have fun!

  • horizontal layouts
    use main form

    step 1: decide overall setup

    • complete step 1 overall wall setup, to document layout parameters: input the height of your chosen horizontal alignment as a reference height, i.e. as used in step 3: A. mid-line (eyeline, eg. 57" or 1450 mm), B. top edges or C. lower edges aligned (measurement results are provided for each of these options in a table in step 3) and input width of wall or section of wall, and the number of works on the wall or section

    step 2: determine horizontal spacing

    • determine horizontal spacing in step 2. The widths of all works (ie. work positions) need to be entered. If your hanging will include multiple frames vertically in a single work position use the width of the widest work as that work position's horizontal width. Use the vert button for works within the vertical group

    • for your specified wall section results show measurements for symmetrical layouts. When setting inter-work or group spacing the balance of first plus end spaces is also shown. This can be used if an symmetric off-center group position is desired.

    • first, including first/end spaces: 1) an even spacing distance which includes first/end spaces as well as inter-work spaces; and 2) calculated even first and end spaces with a specified inter-work distance; or 3) calculated even inter-work space with specified first / end distance

    • second group, not including first/end spaces. This is useful as sometimes a group of works can be considered like a single work in the overall layout: calculation 4) ignores section width to determine the width of the group of works specified in steps 1 and 2 using a set inter-work space and zero first/end width. Calculation 5) allows a target group width to be set and required inter-work space is shown

    step 3: install works

    • use step 3 individual work calculations: for each work to obtain both vertical and horizontal hanging measurements (or the vert button for a vertical group position). Input all information required

    • include your set first / end space or calculated even inter-work space with set first / end space, or use any arbitrary spacing you desire (eg. if uneven or specified spacing is required)

    • drop to fastener will be either: distance from frame top to taught hanging wire, or to inside top of fixed fastening points such as D-rings where the hook would sit (if height of two fasteners is uneven just do two drop calculations). It might also be the stretcher width if simply hanging on nails or screws. Drop to fastener can be a negative number, eg. if using pins in cloth tape

    • inside adjustment is either to D-ring centers or some set distance if hanging on nails, screws, or other fasteners like pins

    • finally expand the appropriate table tab for the alignment method chosen to see the correct results. For each work repeat data entry in step 3. Note that one section of wall may use more than one alignment method, e.g. if you want two rows of works with one top aligned and the other lower aligned. If so, I recommend calculating rows in separate operations using the pdf template to record relevant measurements

    • hang each work one by one according to the calculated measurements; ensure each work is hanging horizontal with a level before proceeding

  • vertical groups
    use vert button

    • a pop-up lightbox form provides results for a single vertical group where works in a section are either centered or edge aligned

    • both vertical and horizontal measurements are given. Only enter inputs for as many works as required up to a maximum of six.

    centers aligned

    • for center aligned groups a group section width needs to be set distance to establish a centerline. This may be arbitrarily set, or if the group is part of a larger array, may be the width of the widest work plus twice the set inter-work space

    • vertical heights for the top of the works and/or their fasteners are calculated and this method places fasteners horizontally relative to the centerline

    • inputs (in red) and results (in blue) for both vertical and horizontal measurements are shown in the diagrams below

    inputs and results for center aligned vertical group

    edges aligned

    • for these calculations the group's vertical edges are to be aligned to the left or right. The alignment can be the edges of the works or at a set the distance from the previous (or next) work's edge. The edge to center and to 1st fastener results will include this additional distance if entered into the optional input

    • vertical heights for the top of the works and/or their fasteners are calculated and this method places fasteners horizontally relative to the desired edge.

    inputs and results for edge aligned vertical group

    • If there are multiple vertical groups whose height must be matched, then vertical inter-work space should be adjusted so each group has the same height. To match multiple groups to a target height, first determine the overall group height for the tallest group with its minimum/set even vertical space. This will set the target height. Then for the remaining vertical groups enter their data and determine a new even vertical space. Finally, adjust the even vertical space to update that group's results

    • note that entries in the lightbox forms will remain until cleared so you can move back and forth between the lightbox and the other forms on a page

  • individual solo works
    use solo button

    • a pop-up lightbox form asks for all the inputs you need and provides all the results required to hang a single work

    • enter work details data into the inputs section, ie. outer width, outer height, drop to fastener, and inside adjustment if using more that one fastener that will be in a fixed position such as D-rings


    • decide on the work's vertical position. This can be done by placing the work on the wall and marking a key position (with pencil or painter'stape), ie. a corner at the top edge or lower edge, or a centerline.

    • alternatively, a decision can be made that the work should be at a particular height. For example, mid-line at 1450mm, or top edge or lower edge at a specified height. This could be a height or place on the wall set using a golden ratio calculation. Input this vertical reference height

    • results are shown for three vertical height options ie. chosen reference height at top edge, mid-line or lower edge


    • then optionally decide a relative horizontal position. If no horizontal position input is used the horizontal result measurements will show the results for the work's own outer width

    • option a) 'to previous edge' is to measure fastener positions from a previous work or wall edge

    • option b) 'to previous fastener' an additional previous work inside adjustment can be added. This is useful if you want to place fasteners before hanging the works. Using option b) place a level (with a measure scale) with one end rested at zero under the previous work's fastener, then the horizontal distance to the first or center fastener can be marked quickly

    • a solo work's centerline can also be used to place one or two fasteners. For two fasteners the distance from the centerline to fasteners is provided in the results table

    solo work diagram with previous work option

    step 2: install works
    • starting at one side, hang works one at a time repeating the process for each work. Ensure each work is hanging horizontal with a level before proceeding

    • If using the option to measure from a previous work's fastener do that before hanging the previous work

    • note that entries in the lightbox forms will remain until cleared so you can move back and forth between the lightbox and the other forms on a page.

  • calculator with scratch pad
    • use buttons like a calculator, or math expressions can be entered directly into the result area by clicking/tapping it and using a keyboard (the area has multiple lines for long expressions), then when ready press blue = button
    • hint: you can also enter your measurements or calculations into the temporary notes area and then copy and paste them into the result area. This is useful to keep track of, or reuse, your measurements and calculations
    • calculator uses mathjs library and can parse and evaluate expressions using many units and constants, eg. feet, inch, m, cm, mm, kg, lb, degF, degC, mean, std, pi, phi, sum, sqrt, ^, %, !, e, trigonometric, bin, hex, etc. For more information: units
    • order of operations:
      • parentheses
      • exponents
      • multiplication and division
      • addition and subtraction
      • same precedence (like * and /) are computed from left to right
    • usage examples include:
      • do basic picture hanging calculations such as: alignment_height+(picture_height/2)-drop_to_fastener for mid-line alignment height, or sum(alignment_height,picture_height/2,-drop_to_fastener);
      • find the longer "golden ratio" length, eg. to locate a mid-point for an off-center work or group in a wall section, enter: length/phi for any height or width
      • determine the location on a floor at 90° from a wall point, calculate the hypotenuse side of a right angle triangle enter sqrt(first^2+second^2) a closing parenthesis needs to be added;
      • conversions for hardware, wires etc. use to, eg. convert feet/inches to mm enter #inch to mm or #feet +#inch to mm, or #kg to lb
    • use clear button to delete notes. Temporary notes will also be cleared on exiting page or app
    • copy button allows copy and paste to another application. External notes can be pasted into scratch pad using OS paste function
  • PDF templates
    • PDF template for hardcopy or as a background in your notes app so you can plan ahead. Use in split screen to scribble measurements. Download button in viewer top bar
    • PDF template to collect artwork dimensions and measurements in preparation for using hangcalc. Download button in viewer top bar
  • app information
    • this is a progressive web app using javascript for calculations. Install it using your web browser, e.g. in Chrome-based browsers use "Add to Home" or "install app" and in iOS "Add to Home Screen"

    • use AC button to clear inputs, exiting page or app will also clear all data

    • The software is provided as is, without warranty of any kind, express or implied. In no event shall the authors or copyright holders be liable for any claim, damages or other liability.

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