THE NUMBERS, EXPLAINED
How to use this calculator.
Evenly spaced composition grid, with only internal guides returned; choose 3 for thirds. Coordinates start at the upper-left corner.
Start with your inputs
Enter artwork width (mm), artwork height (mm), equal grid divisions per axis (count). Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Artwork width (mm) | 300 |
| Artwork height (mm) | 200 |
| Equal grid divisions per axis (count) | 3 |
A worked example
With the example inputs above, vertical guide positions (mm) is 100, 200. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Vertical guide positions (mm) | 100, 200 |
| Horizontal guide positions (mm) | 66.666667, 133.333333 |
How this is calculated
Vertical guide positions (mm)
Place guides at successive equal fractions of width.
Horizontal guide positions (mm)
Place guides at successive equal fractions of height.
Symbols and units
- a
- Artwork width (mm)
- b
- Artwork height (mm)
- c
- Equal grid divisions per axis (count)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions and limits
Evenly spaced composition grid, with only internal guides returned; choose 3 for thirds. Coordinates start at the upper-left corner.
Calculations use the values you enter. Blank or invalid inputs show an error instead of silently substituting zero. Results are displayed to useful precision; calculations retain the underlying numeric precision.
Questions about this tool
What does the result tell me?
Vertical guide positions (mm); Horizontal guide positions (mm). The result applies to the method and inputs described above. Check the units and assumptions before using it in a decision.
Why might another calculator differ?
Differences in units, rounding, timing or model definitions can produce different answers. Compare the input definitions and the method, rather than only the final number. For this tool: Evenly spaced composition grid, with only internal guides returned; choose 3 for thirds. Coordinates start at the upper-left corner.
Are my inputs stored or sent to AI?
Calculations on this page happen in your browser. The separate AI question finder sends its submitted conversation to OpenAI; these calculator fields are not sent. Favourites and recent tool names are stored locally. A shared link contains the inputs you choose to include.
Further reading
OpenStax Prealgebra 2e — arithmetic and proportions ↗
Background reading; this does not imply endorsement or independent review of SumFizz.
Review status
Software example and browser checks are recorded in our quality report. No external expert review is claimed. Created with coding assistance; calculations run as ordinary browser code.
Read the quality report →