SpoolIndex

The Filament Price Index

PLA vs PETG: Which 3D Printing Filament Should You Buy?

A practical, data-backed breakdown of the two most popular 3D printing filaments -- when to use each, what they cost, and how to get the best deal.

PLA and PETG account for the vast majority of desktop 3D printing. Both are easy to print, widely available, and affordable -- but they solve different problems. PLA is the default starter filament: low print temperatures (190-220C), minimal warping, and a huge color selection. It produces sharp detail and is perfect for prototypes, display models, and anything that won't see heat or mechanical stress. The downside: PLA softens around 55-60C and is relatively brittle. PETG fills the gap between PLA and engineering materials. It handles higher temperatures (75-85C heat deflection), resists UV exposure, and has meaningful impact resistance. The tradeoff is slightly trickier print settings -- PETG is prone to stringing if retraction isn't dialed in, and it doesn't bridge as cleanly as PLA. The price gap has narrowed significantly. Based on current market data, PETG typically costs 20-40% more per kilogram than PLA in the same brand tier -- roughly $4-8 extra per spool. For functional parts that need to survive real-world use, that premium is usually worth it. Here's a quick decision framework: if your print lives on a shelf or desk, use PLA. If it goes in a car, near a window, or takes mechanical load, use PETG. If you're not sure, start with PLA -- it's cheaper to learn on, and you can always reprint in PETG once you know the design works.

FAQ

Is PETG stronger than PLA?
Yes, in most practical ways. PETG has higher impact resistance (it bends before breaking, while PLA tends to snap) and better layer adhesion, which makes it stronger along the Z-axis. PLA has slightly higher tensile strength in ideal conditions, but PETG wins for real-world durability.
Can I print PETG on a basic printer without an enclosure?
Yes. PETG prints well in open air at 230-250C nozzle temperature with a 70-80C bed. An enclosure helps with very tall prints but isn't required for most projects. Use a PEI or textured build plate for best adhesion.
Which filament is better for outdoor use?
PETG. PLA degrades in direct sunlight and softens in summer heat (car dashboards, garden fixtures). PETG resists UV and handles temperatures up to about 80C, making it the clear choice for anything that lives outside.
Is PLA or PETG cheaper?
PLA is cheaper. At current market rates tracked by SpoolIndex, budget PLA runs around $12-16/kg while budget PETG is typically $16-22/kg. Check our live price index for the latest deals on both.
Does PETG need a heated bed?
Strongly recommended. A heated bed at 70-80C prevents warping and gives PETG reliable first-layer adhesion. PLA can print on an unheated bed, which is one reason it's easier for beginners.
Both PLA and PETG are excellent filaments -- there's no universal winner. The best approach is to keep both on hand and pick the right one for each project. Use our live price index to find the best current deals on both materials, and check the filament cost calculator to estimate what your next print will cost before you start.

Related