Caulk Calculator
Estimate how many tubes of caulk or sealant you need for your joints.
Use decimals when needed. This estimate updates live and is safe to tweak before you buy materials.
Caulk Buying Guide
This guide helps you turn your caulk calculator result into a cleaner purchase plan. Use it when you want fewer return trips, better waste assumptions, and a more realistic cart.
Step 1: Match the chemistry to the job
Use 100% silicone for wet areas like showers (it is waterproof but cannot be painted). Use acrylic latex for baseboards and trim (it cleans up with water and takes paint beautifully).
Step 2: Factor in the bead size
A standard 10oz tube yields about 50 linear feet if you cut a tiny 3/16-inch hole. If you are filling a massive 1/2-inch gap, that same tube will barely cover 10 feet.
Step 3: Buy backer rod for deep cracks
Caulk should never be deeper than 1/4 inch. If a gap is deep, stuff foam 'backer rod' into it first, then caulk over the top. This saves money and prevents the caulk from cracking.
Recommended for this job
Commonly paired tools and accessories
These are the practical extras people often forget until the last minute, especially when turning a rough estimate into a real purchase list.
Silicone CaulkWhy this helps: Common add-on that reduces last-minute store runs once the estimate is final.
Caulking Tool KitWhy this helps: Common add-on that reduces last-minute store runs once the estimate is final.
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Caulking cost planning rule of thumb
In addition to the tubes, invest $15 in a high-quality, dripless caulking gun. Cheap $3 guns will leak product everywhere and ruin your finish.
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Caulk Calculator FAQ
How many linear feet does a 10 oz tube of caulk cover?
A 10 oz tube typically covers about 24 linear feet for a 1/4-inch bead.