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Easily calculate how much caulk you need with our online Caulk Coverage Calculator. Works for all types of sealants. Fast, accurate, and free to use.
When it comes to sealing gaps and cracks around windows, doors, bathrooms, cars, or concrete surfaces, knowing how much caulk you need can save you both time and money. That’s why we created a Caulk Coverage Calculator to help you quickly and accurately estimate how much sealant is needed for your project.
Whether you're using interior caulk, exterior caulk, silicone sealant, concrete caulk, or even automotive caulking, our calculator is designed to support all types and brands, including Sika sealant and other popular products.
Caulk coverage refers to the total linear length (usually in feet or meters) that one tube of caulk can fill, based on the width and depth of the gap being sealed. Coverage can vary depending on the type of caulk you're using and the size of the joint you're filling. For example, silicone caulk might offer slightly different coverage than concrete or acrylic caulk.
The general formula to calculate caulk coverage is:
Coverage (in feet) = (Volume of tube in cubic inches) ÷ (Width × Depth of joint in inches)
A standard 10 oz tube has about 27 cubic inches of caulk.
If your joint size is 0.25 inches wide and 0.25 inches deep:
Coverage = 27 ÷ (0.25 × 0.25) = 432 feet
So, one 10 oz tube of caulk can cover approximately 432 feet if the joint is 1/4" x 1/4".
Our calculator automatically adjusts for various sealant types including Sika sealants, silicone, concrete, and automotive caulk.
Standard caulk tubes come in 10 oz, but you can also find them in 5 oz, 28 oz, and other sizes. The bigger the tube, the more area it covers.
The width and depth of the joint are the biggest factors in determining how far your caulk will go. Larger gaps require more product.
Some sealants are thicker or denser, which may affect flow and coverage. For example, silicone is smoother and may spread further than a heavy-duty concrete sealant.
You can reverse the formula above to figure this out:
Number of Tubes = Total Linear Feet Needed ÷ Feet Covered per Tube
Let’s say you need to seal 600 feet of gaps and one 10 oz tube covers 432 feet. You’ll need:
600 ÷ 432 = 1.38 tubes
So, round it up to 2 tubes.
For sealing windows, the average window might need one tube per window, depending on the frame size and gap dimensions. Always round up and consider buying an extra tube for safety.
Using a caulk coverage calculator is a smart and time-saving way to ensure your sealing job goes smoothly. No more guesswork or waste just enter your joint size and tube volume, and you’ll get an instant, reliable result. Whether you're working on a home renovation, a bathroom remodel, a vehicle repair, or sealing up concrete joints, this tool makes the job easier.
From interior caulking and window frames to automotive sealing and exterior siding, having the right amount of caulk is essential. Use our calculator before your next project to make sure you’re prepared.
Use the formula:
Coverage = Tube Volume ÷ (Width × Depth)
Or simply enter your values in our caulk coverage calculator for an instant result.
If sealing a 1/4" x 1/4" joint, a 10 oz tube will cover approximately 432 feet.
It depends on the joint size. Smaller joints = more coverage. Larger joints = less. Use the formula or our calculator for an accurate estimate.
Usually, 1 tube per window is enough. But for larger or older windows, you may need more. Always round up.
Yes, this caulk coverage calculator works with Sika, DAP, GE, and other sealant brands.