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How many meters of 1.75mm flexible TPU are in a 1 kg spool?
343.6 meters(approx. 1,127 feet)
A 1 kg spool of 1.75 mm TPU 95A flexible filament provides approximately 343.6 meters (1,127 feet) of material.
Worked Mathematical Derivation
Key Formulation:
Cylinder volume V = 1000g / 1.21 g/cm³ = 826.45 cm³. Cross section A = 0.02405 cm². Length L = 826.45 / 0.02405 = 34,363 cm = 343.63 meters.Calculate Custom Weight or Length
Adjust the values below or switch materials to calculate your custom spool size and length.
Conversion Mode
grams
Filament Diameter
1.21 g/cm³
RESULTS & BREAKDOWNV=πr²L
Filament Length (m)
343.6meters
≈ 1127.3 feet (0.344 km)
Weight:1000.00 g (1.000 kg)
Linear Mass:2.91 g/meter
Total Volume:826.45 cm³
Cross-Section Area:2.405 mm²
Quick Rule of Thumb
Standard 1.75mm PLA yields approximately 330–335 meters per 1 kg spool. PETG yields ~327m, and ABS yields ~400m due to lower density.⚡
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Frequently Asked Questions
How many meters of 1.75mm flexible TPU are in a 1 kg spool?
A standard 1 kg spool of TPU 95A contains 343.6 meters (1,127 feet). Cylinder volume V = 1000g / 1.21 g/cm³ = 826.45 cm³. Cross section A = 0.02405 cm². Length L = 826.45 / 0.02405 = 34,363 cm = 343.63 meters.
How many hours of printing can you get from 1kg of TPU 95A?
A 1kg spool typically yields between 40 and 80 hours of active printing time, depending on layer height, printing speed, and infill density (e.g. standard 50g models taking 3-4 hours each).
How much does an empty 1kg filament spool weigh?
An empty 1kg filament spool typically weighs between 190g and 260g. Cardboard spools (eSun, Polymaker) weigh ~200g-220g, while sturdy plastic spools (Bambu Lab, Prusament) weigh ~240g-250g.
Why does a 1kg spool of TPU 95A have a different length than other plastics?
Filament length is inversely proportional to polymer density (L = Volume / Area, where Volume = Mass / Density). Lighter polymers like ABS (1.04 g/cm³) yield ~400 meters per kg, while denser materials like PLA (1.24 g/cm³) yield ~335 meters, and PETG (1.27 g/cm³) yields ~327 meters.
How many standard 3DBenchy boats can you print from 1kg of TPU 95A?
A standard sliced 3DBenchy with 2 perimeters and 10% infill weighs approximately 11 to 13 grams. A full 1kg spool can print approximately 75 to 90 complete Benchy models without running out.