Shelf Divider and Equal Compartment Calculator
Calculate equal clear compartments and divider positions, or find the greatest compartment count meeting an entered minimum width.
YOUR CALCULATION
Result
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Calculation steps
Work through one step at a time or reveal the complete calculation. The steps use your current inputs.
How to calculate
Subtract the two end clearances and the widths of all internal dividers, then divide the remaining span equally. For a minimum clear width, solve the same inequality for the greatest whole compartment count.
Clear width=(opening−2 end clearances−(count−1)×divider thickness)/count
Worked example
A 1200 mm clear opening with four compartments and three 18 mm dividers gives 286.5 mm clear per compartment. Divider centerlines lie at 295.5, 600 and 904.5 mm from the left inside face.
Assumptions and input details
Use the clear internal opening; outside side-panel thickness is not deducted again. Positions use the left inside face as zero and include the entered end clearance. 1–200 compartments. Thickness is geometric only; no shelf strength, fastening, load or cut-kerf assessment is made. Equality at minimum width has no extra manufacturing tolerance.
Unit definitions
Unit selection is independent of language. Each selector contains only units for its physical quantity. Calculations use defined base units internally.
Choose from 23 length definitions, including explicitly labelled regional measures. Area conversions square the length factor; geometric volumes cube it.
Regional measures are not interchangeable merely because their names look similar. This is a documented selection, not a claim to include every historical unit.
NIST measurement tables · Japanese traditional units · Mainland China and Hong Kong unit distinctions
Using this calculator
Can I enter my own problem?
Yes. Replace the example values with your own inputs. The result, calculation steps, tables and applicable diagrams update from those inputs. Blank or invalid values clear the result; example values are never silently substituted for missing inputs.
Are the results exact?
Results use floating-point arithmetic and displayed rounding. Read the formula, assumptions and any stated data precision before interpreting the result.
Is my input uploaded?
The calculation runs in your browser. No account, file upload or external AI service is required. Inputs are not saved between page reloads.
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