PLA vs PETG: Print Settings Compared
PLA and PETG are the two filaments most makers reach for, and they behave very differently in the slicer. This side-by-side breaks down the settings that matter — and helps you pick the right material for the job before you waste a spool.
Settings side by side
The values below are typical starting points for a 0.4 mm nozzle. PETG runs hotter, slower, and with much less cooling than PLA. The gap in part-cooling is the single biggest difference between the two.
| Setting | PLA | PETG |
|---|---|---|
| Nozzle temp | 200–220 °C | 230–250 °C |
| Bed temp | 55–60 °C | 70–80 °C |
| Print speed | up to 200+ mm/s | 60–100 mm/s |
| Part cooling fan | 100% | 30–50% |
| Retraction (direct) | 0.4–0.8 mm | 0.6–1.0 mm |
| Bed adhesion | Easy, low-stick | Sticks hard — mind Z-offset |
| Stringing tendency | Low | Higher — keep it dry |
How the two materials differ
PLA is rigid, dimensionally accurate, and forgiving. It prints fast with full cooling, holds crisp detail, and rarely warps — which is exactly why it dominates display models, prototypes, and beginner prints. Its weakness is heat: a PLA part left in a hot car or near a window will sag, and it is relatively brittle under impact.
PETG trades some of that ease for toughness. It is more flexible, far more impact-resistant, and holds up to heat and the outdoors better than PLA. The cost is a fussier print: it strings more, bonds aggressively to the bed, and demands slower speeds and lighter cooling so layers fuse properly. Get those right and PETG produces strong, slightly glossy functional parts.
When to use PLA
- Display models, miniatures, and anything where fine detail matters
- Fast prototypes where speed beats strength
- Parts that stay indoors at room temperature
- Beginners learning a new printer — it is the most forgiving option
When to use PETG
- Functional parts, brackets, and enclosures that take stress or impact
- Items exposed to heat, sunlight, or the outdoors
- Parts that need a bit of flex without snapping
- Food-adjacent or chemical-contact items (PETG resists many chemicals better)
The mistakes people make switching between them
The most common error is printing PETG with PLA settings. Full cooling and high speed produce weak, ugly PETG every time. The reverse — printing PLA too hot with no fan — gives droopy overhangs and stringing. Always load a profile that matches the material, not just the printer.
Bed handling differs too. PLA releases easily from most surfaces, while PETG can fuse to a hot PEI plate so firmly that it chips the coating. With PETG, let the bed cool before removing parts, keep the first layer a hair less squished, and never add glue as an adhesion promoter — you may need a release agent instead.
Calibrate either way
Whichever you choose, a quick temp tower and flow test per spool removes the guesswork. PLA's wide, forgiving window means you can often skip straight to printing; PETG rewards a few minutes of calibration with dramatically cleaner results.
