Appliances & Utilities calculator
What Range Hood Size Do I Need?
Use cooktop width, desired hood overhang each side, available cabinet span to find range hood width.
Enter your measurements
What Range Hood Size Do I Need uses cooktop width, desired hood overhang each side, available cabinet span and the other configured measurements to return range hood width with a formula written specifically for this tool.
- Cooktop width — Required
- Desired hood overhang each side — Required
- Available cabinet span — Required
Range hood width
Enter the measurements above to calculate range hood width.
How the calculation works
V9 calculation: unconstrainedHoodWidth=cooktopWidth+2×sideCaptureOverhang; recommendedHoodWidth=min(unconstrainedHoodWidth,maxCabinetWidth); fullCaptureFit=unconstrainedHoodWidth≤maxCabinetWidth. The result is reported as range hood width.
Worked example
Example: Cooktop width = 60 cm; Desired hood overhang each side = 30 cm; Available cabinet span = 50 cm. Result: Recommended Hood Width = 50 cm; Full Capture Fit = Does not pass; Unconstrained Hood Width = 120 cm.
Before you decide
Use measured dimensions rather than nominal labels. This page calculates the stated geometry or quantity only; product-specific construction or installation details can still affect the final choice. For what range hood size do i need, the limiting result on this page is range hood width.
Direct measurement/geometry calculation. No external reference is required for the arithmetic itself; the result is derived only from the user-entered measurements and the formula stored in calculationLogicJson.
Frequently asked questions
What does the Range Hood Size calculator tell me?
It returns range hood width from the measurements entered on this page. The calculation is specific to range hood size, so the result should be compared with the exact product or specification you are considering.
Which measurements should I take for range hood size?
Measure cooktop width, desired hood overhang each side, available cabinet span. Use clear, usable dimensions rather than nominal room or product labels.
Should I round the range hood width?
Keep the calculated value for comparison, then choose a real product that meets or stays within the returned range hood width while allowing for the clearances, tolerances or ratings shown by its manufacturer.