Why does bed temperature matter?

Bed temperature keeps the first layers warm enough to bond to the surface and to each other. Too cold and the part lifts. Too hot can cause elephant foot (first layers bulging outward).

Should the first layer bed temp be different?

Many users set the first layer bed temperature 5°C higher than the rest of the print to improve initial adhesion, then lower it to reduce elephant foot.

Does the bed surface change the temperature I should set?

Not the bed temperature itself. Manufacturer slicer profiles use the same bed setpoint on smooth PEI, textured PEI, glass and BuildTak. This calculator recommends a generic PETG bed of ~80°C (first layer ~85°C) on every surface; some brands run hotter — Prusament PETG, for example, can use a bed around 90°C — but the figure stays the same across smooth and textured sheets. What changes between surfaces is adhesion strength and release: smooth PEI grips PETG so hard it can damage the sheet, so a glue-stick release layer or a textured sheet is preferred. Adjust the surface, not the temperature.

Does an enclosure mean I can lower the bed temperature?

No. An enclosure raises the chamber (air) temperature to roughly 40–50°C, which stops warp-prone materials like ABS, ASA and PC from cooling unevenly. The bed setpoint stays at the datasheet value — Prusa specify a bed of at least 100°C for ASA even inside an enclosure. Treat the chamber temperature as a separate target from the bed temperature.

What is glass transition temperature, and is a bed above Tg a problem?

The glass transition temperature (Tg) is where a plastic softens. Setting the bed near or just above Tg actually helps the first layer fuse to the plate — PETG (Tg ≈ 80°C) is commonly run on an 85–90°C bed on purpose. This calculator flags when the bed is at or above Tg so you know adhesion is being boosted; only worry if you see the part deforming or sagging at the base.

Bed Temperature Calculator

How We Calculate This

How It Works

This calculator looks up the recommended bed temperature for each material from manufacturer datasheets and slicer defaults (Prusa, Polymaker, Sovol). The bed surface does not change the temperature, so the same setpoint is used on smooth PEI, textured PEI, glass and BuildTak.

Base bed temperature — the datasheet bed setpoint for the material (e.g. PLA 60°C, PETG 80°C, ABS/ASA 100°C, PC ≈100°C)
First layer — set 5°C higher than the main bed temp for stronger initial adhesion
Ambient offset — nudge the bed up a few degrees in a cold room (an open-frame printer loses heat faster) or down in a hot room. This is independent of any enclosure
Recommended chamber temp — for warp-prone materials (ABS, ASA, PC, Nylon) an enclosure should hold the air at roughly 40–50°C. This is a separate target from the bed — an enclosure never lets you lower the bed setpoint
Margin to Tg — how far the bed sits below the glass transition temperature; a small or slightly-negative margin is normal and aids adhesion

Always do test prints to fine-tune for your specific printer, filament brand and environment.

Frequently Asked Questions

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Last updated: February 2026

All calculations are estimates. Always verify settings with test prints before committing to final prints.

Bed Temperature Calculator — Material & Surface Guide