How to use this tool
- Enter cabinet opening width, runner clearance per side, drawer side thickness, and extra combined fit allowance in the displayed units.
- Calculate and use each labeled result for drawer box runner clearance. Compare the result with a measured sample before committing materials.
Try this example
{
"opening": 60,
"runner": 1.25,
"side": 1.5,
"tolerance": 0.1
}Accuracy and scope
Use the exact hardware specification; undermount runners can require different clearances and notches.
Is my data uploaded?
This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.