HOW IT IS CALCULATED
Estimate filament remaining on a spool
Subtract empty spool mass, then convert remaining filament weight into approximate length.
Instant resultClear formulaRuns locally
01Values
02filament weight = spool − empty; length = weight ÷ density ÷ cross-sectional area
03Result
A 650 g spool with a 250 g empty spool contains about 400 g of filament.
Knowing empty spool weight is important
Including the spool itself would otherwise overestimate remaining material.
02
In short
What logic does the calculator use?
filament weight = spool − empty; length = weight ÷ density ÷ cross-sectional area
Example?
A 650 g spool with a 250 g empty spool contains about 400 g of filament.