THE NUMBERS, EXPLAINED
How to use this calculator.
Deduct slide clearance on both sides, then both drawer walls. Enter the actual slide manufacturer clearance. This is a width calculation only.
Start with your inputs
Enter opening width (mm), slide clearance each side (mm), wall thickness (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) | 500 |
| Slide clearance each side (mm) | 12.5 |
| Wall thickness (mm) | 15 |
A worked example
With the example inputs above, drawer outside width (mm) is 475. Change the inputs to explore your own scenario.
Putting the example numbers into the formula
Drawer outside width (mm)
(500)-2 × (12.5) = 475
Drawer inside width (mm)
(500)-2 × (12.5)-2 × (15) = 445
| Result | Example answer |
|---|---|
| Drawer outside width (mm) | 475 |
| Drawer inside width (mm) | 445 |
How this is calculated
Drawer outside width (mm)
a-2 × b
Drawer inside width (mm)
a-2 × b-2 × c
Symbols and units
- a
- Opening width (mm)
- b
- Slide clearance each side (mm)
- c
- Wall thickness (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
Deduct slide clearance on both sides, then both drawer walls. Enter the actual slide manufacturer clearance. This is a width calculation only.
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?
Drawer outside width (mm); Drawer inside width (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: Deduct slide clearance on both sides, then both drawer walls. Enter the actual slide manufacturer clearance. This is a width calculation only.
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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