PETG length by spool size
PETG is slightly denser than PLA, so the same weight gives you a little less length. These figures use a typical density of 1.27 g/cm³.
| Net weight | Metres (1.75 mm) | Metres (2.85 mm) | Feet (1.75 mm) |
|---|---|---|---|
| 250 g | 81.8 | 30.9 | 269 |
| 500 g | 163.7 | 61.7 | 537 |
| 750 g | 245.5 | 92.6 | 806 |
| 1 kg | 327.4 | 123.4 | 1,074 |
| 2 kg | 654.7 | 246.9 | 2,148 |
| 3 kg | 982.1 | 370.3 | 3,222 |
How it is calculated
One metre of 1.75 mm filament is a cylinder with a volume of 2.405 cm³. At 1.27 g/cm³ that weighs 3.05 g, so 1000 g ÷ 3.05 g = 327 m.
Length (m) = weight (g) ÷ (π × (diameter ÷ 2)² × density)
What that means in practice
- A 1 kg spool of PETG is enough for roughly 40–60 average-sized prints of 15–25 g each.
- Typical nozzle temperature for PETG: 220–250 °C. See the temperature chart.
- PETG absorbs some moisture over time; dry it if it starts to pop or string more than usual.
- The weight on the label is the filament only. The empty spool adds another 150–250 g for plastic spools.
Frequently asked questions
How much does 1 metre of PETG weigh?
About 3.05 g for 1.75 mm and 8.10 g for 2.85 mm.
How many metres are on a 500 g spool of PETG?
About 164 m of 1.75 mm filament.
Is there enough PETG left for my print?
Weigh the spool, subtract the empty spool weight, and enter the remaining grams in the converter above. Compare it with the length your slicer reports, and keep a few metres spare.
Last reviewed October 2026. See how we calculate.