1.75mm 또는 2.85mm 기준으로 PLA, PETG, ABS, ASA, TPU, PC 등 필라멘트의 길이(m), 무게(g), 총 비용을 서로 변환하세요. "스풀에 남은 양" 계산기도 포함되어 있습니다.
필라멘트는 원기둥 형태입니다. 미터당 부피 = π × (d/2)² × 100cm. 여기에 밀도(g/cm³)를 곱하면 미터당 그램 수가 나옵니다. 무게를 미터당 그램 수로 나누면 길이를, 길이에 곱하면 무게를 구할 수 있습니다.
1.75mm PLA ≈ 2.98g/m이므로 일반적인 1kg 스풀에는 약 335m가 감겨 있습니다. 2.85mm PLA ≈ 7.91g/m로, 1kg당 약 126m입니다.
Filament is treated as a perfect cylinder, so the tool computes volume per metre as pi times the radius squared times 100 cm, then multiplies by the material density to get grams per metre. At 1.75 mm with PLA at 1.24 g/cm³ that is about 2.98 g/m; at 2.85 mm it is about 7.91 g/m. From there it converts in whichever direction you asked for, and cost is simply weight in kilograms multiplied by your price per kg.
Density and diameter are the two things that move the answer, and diameter matters more because it is squared. The material dropdown ranges from ABS at 1.04 g/cm³ up to CF-PLA at 1.30, with PLA 1.24 as the default. The Calculate dropdown picks the direction: length to weight, weight to length, or spool weighing. That last mode subtracts your empty spool weight (default 200 g) from the total on the scale (default 1100 g) to give what is left.
The maths assumes filament is exactly at its nominal diameter and perfectly round, which real filament is not — a spool held to plus or minus 0.03 mm carries a few percent of error, and because the radius is squared that error roughly doubles in the result. Densities are generic per material type, not per brand, and pigment-heavy or filled filaments drift from them. Nothing here accounts for purge towers, priming lines or failed prints, and cost is always shown with a dollar sign.
At 1.75 mm, PLA at 1.24 g/cm³ weighs about 2.98 grams per metre, so a 1 kg spool holds roughly 335 metres. The same kilogram in 2.85 mm is about 7.91 g/m, giving only about 126 metres of filament.
Switch the Calculate dropdown to spool weighing, put the whole spool on a kitchen scale and enter that total, then enter the weight of a bare empty spool for that brand. The tool subtracts one from the other and converts the remainder to metres.
Per metre, yes — about 2.65 times as much, because cross-sectional area scales with the square of the diameter. For the same printed part the weight is identical; you simply feed far fewer metres of the thicker filament through the extruder.
The dropdown already carries them: PETG at 1.27 g/cm³ and ABS at 1.04. Also listed are PLA+ 1.25, TPU 95A 1.21, ASA 1.07, Nylon 1.15, Polycarbonate 1.20, wood-fill PLA 1.28 and CF-PLA 1.30. Pick the closest match to your spool.
Slicers report the filament they will actually extrude, including skirts, prime lines, purge blocks and tool-change waste. This calculator converts a clean length or weight using geometry only, so expect the slicer figure to run slightly higher on multi-material or heavily purged prints.
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