Layer Height Calculator
Calculate optimal layer height from nozzle diameter and print quality target. Set layer resolution as a fraction of nozzle size for best FDM results.
Specialist tool for 3D Printing1 documented formula1 real workflowPrivate in your browser
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Inputs that matter
Nozzle Diameter, Print Quality
Output to expect
Layer Height Calculator
How it works
1 documented formula across 1 calculation mode
- Keep 1 bounded input within the limits shown beside the fields.
- Confirm that every value uses the unit and time basis shown before comparing scenarios.
- Change one input at a time to see which assumption materially changes the result.
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Reference & details
How it works
Updated July 2026
How it works
Updated July 2026Nozzle Diameter Rule
Optimal layer height is 25–75% of nozzle diameter. A 0.4 mm nozzle works best at 0.10–0.30 mm layers. Exceeding 80% of nozzle diameter reduces extrusion consistency.
Layer height = nozzle diameter × quality factor (0.25–0.75)Quality Tier Selection
Draft: 50–75% of nozzle (fast, visible layers). Standard: 30–50% (balanced). Fine/detail: 20–30% (slow, smooth surfaces).
Draft 0.28 mm | Standard 0.20 mm | Fine 0.12 mm (0.4 mm nozzle)Step Height Compatibility
Layer height should be a multiple of motor step resolution (Z-axis). Common magic numbers for 0.4 mm nozzle: 0.08, 0.12, 0.16, 0.20, 0.24, 0.28 mm.
Z step alignment improves surface consistency on some printersUpdated: July 2026
Example Scenarios
Standard 0.20 mm layer height (50% rule). Good balance of speed and quality for functional parts at 50–60 mm/s print speed.
Draft 0.36 mm (60%) or standard 0.28 mm (47%). Larger nozzle enables faster volumetric flow for big structural prints.
Fine 0.06–0.08 mm layers (24–32%). Slow print but captures small features on 28 mm scale miniatures.
Common Mistakes to Avoid
Common Mistakes to Avoid
Setting layer height above 80% of nozzle diameter
Layers too thick for the nozzle (e.g., 0.36 mm on 0.4 mm nozzle) produce inconsistent extrusion and poor layer bonding. Upgrade nozzle or reduce layer height.
Using fine layers without adjusting print speed
Thin layers at high speed starve extrusion. Reduce speed or increase temperature when going below 0.12 mm on a 0.4 mm nozzle.
FAQ
0.20 mm is the most common standard. Use 0.28 mm for draft speed, 0.12–0.16 mm for visible surfaces and fine detail.
Yes — 0.10 mm is 25% of nozzle diameter, within the fine range. Print time roughly doubles vs 0.20 mm. Diminishing returns below 0.08 mm on most FDM machines.
Thicker layers can improve interlayer adhesion per unit time but reduce Z-axis resolution. 0.20 mm is a good strength/speed compromise for structural PLA and PETG parts.
First layer is often 90–100% of nozzle diameter (0.36–0.40 mm on 0.4 nozzle) for bed adhesion regardless of subsequent layer height setting.
Thinner layers need slower speeds or lower acceleration to maintain volumetric flow limits. Halving layer height roughly doubles print time at the same speed.
About Layer Height Calculator
Layer height is the primary resolution control in FDM printing. This calculator recommends optimal layer height as a fraction of nozzle diameter for draft, standard, and fine quality tiers.