PLA vs PETG vs ABS: Which Filament Should You Choose?
PLA, PETG, and ABS are the three most common 3D printing filaments — but they behave very differently. Here's how to pick the right one for your project.
Choosing between PLA, PETG, and ABS is the first decision most 3D printing beginners face — and it's one that experienced makers revisit constantly. Each material has genuine strengths and real limitations. Here's an honest breakdown.
Quick Comparison
| Property | PLA | PETG | ABS |
|---|---|---|---|
| Ease of printing | Easiest | Easy | Hard |
| Strength | Medium | Medium-High | High |
| Heat resistance | Low (~60°C) | Medium (~80°C) | High (~100°C) |
| Flexibility | Brittle | Slight flex | Some flex |
| Warping | Minimal | Minimal | Significant |
| Requires enclosure | No | No | Yes |
| Fumes | None | Minimal | Yes — ventilate |
| Post-processing | Sanding | Sanding | Acetone smoothing |
| Price | $ | $$ | $$ |
PLA — The Best Starting Point
Polylactic Acid (PLA) is made from plant starch (corn, sugarcane) and is the most beginner-friendly filament available. It prints at low temperatures, doesn't warp, and comes in hundreds of colors and finishes (matte, silk, glow-in-the-dark, wood-fill, etc.).
When to use PLA:
- Decorative objects, figurines, and display pieces
- Prototypes where heat resistance isn't needed
- Cosplay props and accessories
- Any project where ease of printing matters more than durability
When NOT to use PLA:
- Anything left in a hot car (it will deform above ~60°C)
- Outdoor applications where UV exposure will cause degradation over time
- Parts that need to flex without breaking
PLA Print Settings (typical):
- Nozzle: 200–220°C
- Bed: 50–60°C
- Speed: 40–80 mm/s
- Cooling fan: Full on (PLA benefits from active cooling)
PLA+ — The Upgrade Worth Considering
PLA+ (also called PLA Plus or Enhanced PLA) is a modified PLA that's tougher, less brittle, and slightly easier to print. If you're already printing PLA and want stronger parts, PLA+ is an easy upgrade — same printer settings, better results.
It costs slightly more and comes in fewer colors, but for functional parts it's usually worth it.
PETG — The Workhorse
Polyethylene Terephthalate Glycol (PETG) is what many experienced makers reach for by default. It's tougher than PLA, has better chemical and moisture resistance, can handle temperatures up to ~80°C, and has a slight natural flexibility that makes it less brittle.
PETG is commonly used for:
- Water bottles and food containers (though layer-line bacteria trapping is a concern)
- Phone cases and mechanical parts
- Anything that needs to survive moderate heat
- Projects that need some impact resistance
PETG quirks to know:
- It strings. PETG is stickier than PLA. You'll need more retraction and potentially lower temperatures to reduce stringing.
- It sticks to glass. PETG can bond too aggressively to glass beds — use a release agent (hairspray, glue stick) or a PEI sheet.
- Layer adhesion is excellent. This makes it great for functional parts, but means it can be hard to remove supports.
PETG Print Settings (typical):
- Nozzle: 230–250°C
- Bed: 70–85°C
- Speed: 40–60 mm/s (slower than PLA to reduce stringing)
- Cooling fan: 50% — too much cooling weakens layer adhesion
ABS — High Performance, High Effort
Acrylonitrile Butadiene Styrene (ABS) is the material LEGO bricks are made from. It's heat-resistant (up to ~100°C), impact-tough, and can be post-processed beautifully with acetone (which melts the surface, sealing layer lines and creating a smooth finish).
The catch: ABS is genuinely difficult to print. It warps aggressively as it cools, almost always requires an enclosed printer, and releases styrene fumes you don't want to breathe.
When to use ABS:
- Parts that live near heat sources (engine bays, electronics enclosures)
- Parts that need to be acetone-smoothed for a professional finish
- High-impact applications
When NOT to use ABS:
- Open-frame printers (it will warp and delaminate)
- Enclosed spaces without ventilation (fumes)
- When ASA would do the job (ASA has the same strength + UV resistance without quite as much warping)
ABS Print Settings (typical):
- Nozzle: 240–260°C
- Bed: 100–110°C
- Speed: 40–60 mm/s
- Enclosure: Required
- Cooling fan: Off or minimal
The Bottom Line
Choose PLA if you're new to 3D printing, printing decorative objects, or just want something that works.
Choose PETG if you need a functional part with better strength and heat resistance than PLA, and you don't want to deal with the complexity of ABS.
Choose ABS if you specifically need heat resistance above 80°C, impact resistance, or want to acetone-smooth your parts — and you have an enclosed printer with ventilation.
For outdoor parts, ASA is often a better choice than ABS (same toughness, UV-resistant). For flexible parts, look at TPU. For maximum strength, consider Nylon (PA) or PC.
Browse all available filaments and their settings profiles in the Filaments section.