Quick Calculators · Free to use
Caulk & Sealant Calculator
Estimate sealant volume and whole cartridges for a rectangular joint using usable container volume.
Your estimate
Enter your measurements to see the estimate.
Whole cartridges
cartridges- Net rectangular joint volume
- cu in
- Sealant including allowance
- US fl oz
Rectangular sealant section only. Bead shape, backer rod, tooling, adhesion requirements, and manufacturer joint-width/depth limits affect actual use. Not a sealant joint design.
How to Use This Calculator
Estimate sealant volume and whole cartridges for a rectangular joint using usable container volume.
Decimals and fractions accepted for dimensions. Unmarked values use the labeled unit; explicit feet/inches are converted. For example, 10' 6 1/4" is an explicit length; 10.6 means 10.6 of the labeled unit. Rates, prices, counts and areas use numbers only.
Inputs and where to find them
Total joint length (ft). Add the lengths of the joints receiving this sealant. Measure along the joint, and calculate joints with different cross-sections separately. This length is multiplied by the width and filled depth to estimate the bead volume.
Joint width (in). Measure the clear width of the joint that will be filled with sealant. Use the installed joint opening rather than the width of a cartridge nozzle. Check the product’s permitted joint proportions separately.
Sealant depth (in). Enter the actual thickness of the sealant bead within the joint. Where backer rod is used, measure the sealant above the rod rather than the entire cavity depth. The quantity here treats that filled section as rectangular.
Usable container volume (US fl oz). Use the usable sealant volume in one cartridge or container, in US fluid ounces. Fluid ounces measure volume; ounces printed as product weight are not interchangeable. Allow for material that cannot be dispensed if it is not included in your usable yield.
Allowance (%). Enter the percentage you want to add for cutting, handling loss or other conditions specific to this work. Apply it to the measured quantity rather than enlarging the measurements as well. The suggested value is editable, not a universal recommendation; enter zero when no allowance is needed.
Results, example and assumptions
Net joint volume describes the rectangular filled space before allowance. Required fluid ounces include the allowance, and the cartridge count rounds that demand up using your usable container volume. Actual bead shape, backer rod and tooling affect material use, so confirm the joint detail and product limits.
Joint volume = length × 12 × width × depth in cubic inches. US fluid ounces = volume × 128 ÷ 231. Apply allowance, then divide by usable cartridge volume and round up.
Worked example: 100 ft of 1/4 × 1/4 in joint is 75 cu in. At 10% allowance, 45.7143 US fl oz requires 5 cartridges with 10.1 usable fl oz each.
Rectangular sealant section only. Bead shape, backer rod, tooling, adhesion requirements, and manufacturer joint-width/depth limits affect actual use. Not a sealant joint design.