Caulk Calculator
How It Works
Caulk seals gaps and joints around windows, doors, bathtubs, countertops, and other areas where two surfaces meet. Calculating the right amount prevents wasteful trips to the store and ensures you have enough for the complete job.
Standard caulk tubes are 10.1 fl oz (fits a caulk gun) and cover approximately 30-50 linear feet of a 1/4-inch bead. Squeeze tubes are typically 5.5 fl oz for smaller projects. The actual coverage depends on joint width and depth — wider and deeper joints use significantly more caulk.
For joints wider than 1/2 inch, use a backer rod to fill the void before caulking. This reduces caulk consumption, allows proper curing depth, and creates a better seal. The ideal caulk joint has a depth of half its width for optimal flexibility and adhesion.
Frequently Asked Questions
How many linear feet does a tube of caulk cover?
A standard 10.1 oz tube covers approximately 30-50 linear feet with a 1/4-inch bead. For a 1/2-inch bead, expect 12-20 linear feet. Coverage decreases significantly with wider joints.
Which type of caulk should I use?
Silicone for bathrooms and kitchens (waterproof, flexible). Acrylic latex for interior trim (paintable, easy cleanup). Polyurethane for exterior gaps (extremely durable). Butyl rubber for gutters and roofing.
How long does caulk last?
Quality caulk lasts 5-10 years in most applications. Silicone tends to last longest (10-20 years). Acrylic latex lasts 5-10 years. Factors affecting longevity include UV exposure, moisture, temperature changes, and joint movement.
What is the ideal caulk joint depth?
The ideal depth is half the joint width. For a 1/2-inch wide joint, the caulk should be 1/4-inch deep. For deeper joints, use a backer rod to limit the depth. Caulk that is too deep is more likely to crack.