Length
Millimeters
mm
Inches
in
Centimeters
cm
Temperature
Celsius (°C)
°C
Fahrenheit (°F)
°F
Nozzle → Layer Heights
Filament Cross-Section & Flow
Cross-section area
—
Print speed
mm/s
Layer height
mm
Line width
mm
Grams ↔ Meters of Filament
Material
Diameter
Grams
g
Meters
m
Speed Units
mm / second
mm/s
mm / minute
mm/min
inches / minute
in/min
Filament cross-section & flow — Volumetric flow = layer height × line width × print speed. This is the theoretical value; actual flow depends on extruder calibration and material viscosity. Most standard FDM hotends are rated to 10–15 mm³/s; high-flow hotends (Volcano, CHT) reach 30–60 mm³/s.
Grams ↔ meters — Calculated from filament density and the cross-section area of a solid cylinder at the stated diameter. Real filament diameter varies by ±0.02–0.05 mm, which shifts the conversion by ~2–6%.