Caulk Calculator
A quarter-inch joint, 48 feet long, holds 36.00 cubic inches, which is 2 tubes of the 10.1 ounce example.
Last updated . Bead width starts at a quarter inch. Depth matches it. Length starts at 48 feet.
A caulk calculator for the sealant in a joint. Multiply the three dimensions, convert to fluid ounces, then round up by the cartridge you type.
Paint for the wall beside the joint: paint calculator. Mortar in a masonry joint: mortar calculator. A floor finish: flooring calculator.
Joint volume and tubes
The 10.1 fluid ounce figure is a labeled cartridge size, not a manufacturer yield. Replace it with the ounces on the tube you are buying. Volume does not depend on that box.
Results
Cubic inches, then cartridges
A bead 1/4 inch by 1/4 inch by 48 feet is 0.25 × 0.25 × 576 = 36.00 cubic inches. Fluid ounces are that volume times 128/231, which is 19.95. Cubic centimeters are 36 times 16.387064, which is 589.93. One fluid ounce is 231/128 cubic inches. Printed to four decimals, that factor is 1.8047. Ten and one tenth times the unrounded factor is 18.22734375 cubic inches, shown as 18.23. Two cartridges cover 36.00 because one cartridge is short of the joint.
The ounce box is an example so the rounding can be checked. Swap in the fluid ounces printed on the cartridge. The volume line stays put when that box is empty. This page does not estimate a price.
Worked joints
| Width | Depth | Length | Volume | Tubes at 10.1 fl oz |
|---|---|---|---|---|
| 0.25 in | 0.25 in | 48 ft | 36.00 in³ | 2 |
| 0.25 in | 0.25 in | 24 ft | 18.00 in³ | 1 |
| 0.50 in | 0.25 in | 48 ft | 72.00 in³ | 4 |
Caulk questions
How much caulk is in a quarter-inch joint 48 feet long?
Leave width and depth at 0.25 in, length at 48 ft, and tube size at 10.1. Volume reads 36.00 in³ · 589.93 cm³. Fluid ounces reads 19.95 fl oz. Tubes reads 2.
Where do 1.8047 and 18.23 come from?
The line under the results reads 1 fl oz = 1.8047 in³, from 231/128. This tube is 18.23 in³. Tubes round the joint volume up by that figure. A US gallon is 231 cubic inches and 128 fluid ounces, so the unrounded factor is 1.8046875. The tube line divides by 10.1 times that factor, 18.22734375, and then shows 18.23. The 10.1 is an example cartridge, not a brand yield.
What if the joint is only 24 feet?
Change the length to 24 ft. Volume reads 18.00 in³ · 294.97 cm³. Fluid ounces reads 9.97 fl oz. Tubes reads 1.
What if the joint is a half inch wide?
Set the width to 0.5 in and the length back to 48 ft, with depth still 0.25 in and the tube still 10.1. Volume reads 72.00 in³ · 1,179.87 cm³. Fluid ounces reads 39.90 fl oz. Tubes reads 4.
What if the tube size is cleared?
Clear the tube size and leave the joint at 0.25 in by 0.25 in by 48 ft. Volume reads 36.00 in³ · 589.93 cm³. Fluid ounces reads 19.95 fl oz. Tubes reads Enter a tube size.
Does this page price the tubes?
No. It stops at volume and a tube count. There is no dollar field and no coverage rate taken from a product sheet.