THE NUMBERS, EXPLAINED
How to use this calculator.
Grooves extend beyond the visible opening. Clearance applies at every edge; each movement reserve is a total dimension deduction. Enter measured allowances, not a guessed species recommendation.
Start with your inputs
Enter opening width (mm), opening height (mm), groove depth each edge (mm), clearance each edge (mm), total width movement reserve (mm), total height movement reserve (mm). Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Opening width (mm) | 400 |
| Opening height (mm) | 600 |
| Groove depth each edge (mm) | 10 |
| Clearance each edge (mm) | 1 |
| Total width movement reserve (mm) | 4 |
| Total height movement reserve (mm) | 0 |
A worked example
With the example inputs above, panel width (mm) is 414. Change the inputs to explore your own scenario.
Putting the example numbers into the formula
Panel width (mm)
(400)+2 × (10)-2 × (1)-(4) = 414
Panel height (mm)
(600)+2 × (10)-2 × (1)-(0) = 618
| Result | Example answer |
|---|---|
| Panel width (mm) | 414 |
| Panel height (mm) | 618 |
How this is calculated
Panel width (mm)
a+2 × c-2 × d-e
Panel height (mm)
b+2 × c-2 × d-f
Symbols and units
- a
- Opening width (mm)
- b
- Opening height (mm)
- c
- Groove depth each edge (mm)
- d
- Clearance each edge (mm)
- e
- Total width movement reserve (mm)
- f
- Total height movement reserve (mm)
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
Grooves extend beyond the visible opening. Clearance applies at every edge; each movement reserve is a total dimension deduction. Enter measured allowances, not a guessed species recommendation.
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?
Panel width (mm); Panel height (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: Grooves extend beyond the visible opening. Clearance applies at every edge; each movement reserve is a total dimension deduction. Enter measured allowances, not a guessed species recommendation.
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: algebra and proportional reasoning ↗
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.
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