Formula used
Fluid ounces = joint length × joint width × joint depth × 0.554113 × allowance factor
Worked sealant example
Sealant Calculator example: 99.5 ft × 12 × 1 in × 0.25 in = 298.5 in³. Converting and adding 10% gives 181.94 fl oz, or 19 tubes of 10.1 fl oz.
Package rounding and usable yield
Round to full cartridges or sausages of the exact package size, and keep primer and backer rod as separate takeoff items.
Why the label value may not match the floor or wall
Backer rod, hourglass profile, irregular joint edges, tooling, start-stop waste, cartridge residue, and temperature affect material usage.
Questions specific to this calculation
Why do joint width and depth change tube count so quickly?
Measure total joint length in feet and joint width and depth in inches, using the designed sealant cross-section rather than the full cavity depth.