What is kerf compensation?

Kerf compensation is the process of adjusting a tool's cutting path in a CAD/DXF file to account for the width of the cut (the 'kerf') made by a laser, plasma, or waterjet cutter. This ensures the finished part has the correct dimensions.

Why is there an inner and outer offset?

Different offsets are often needed for external cuts (outer profiles) versus internal cuts (like holes) to maintain dimensional accuracy, especially when dealing with thick materials or significant kerf taper.

Kerf Offset Calculator | CNC & Laser Cutting

Input Parameters

Offset Results

Outer Kerf Offset (Lₖₐ):	mm
Inner Kerf Offset (Dₖₐ):	mm

Calculation Steps

Technical Diagram

Clearance Hole Specifications

(Based on DIN EN 20273/ISO 273 Standards)

Metric Thread	Medium	Coarse
M5	5.5	5.8
M6	6.6	7
M8	9	10
M10	11	12
M12	13.5	14.5
M14	15.5	16.5
M16	17.5	18.5
M18	20	21
M20	22	24
M24	26	28
M27	30	32
M30	33	35
M36	39	42

Sizes are color-coded based on suitability for the selected plate thickness. Always verify dimensions before finalizing your DXF file.

Determine offset values for DXF files and raw dimensions in CAD models. This tool calculates kerf compensation based on plate thickness and machining parameters to ensure final dimensions align with design specifications after laser, plasma, or CNC machining.

Cutting Offset Calculator

Input Parameters

Offset Results

Calculation Steps

Technical Diagram

Clearance Hole Specifications

Sample Process