Sealant Calculator

Calculate how many tubes of sealant you need to fill a joint of a given size.

Sealant Tubes
— tubes
Standard 10.1 oz tubes.

Usage Tip

Use a backer rod in deep joints so the sealant bonds to just two sides and can flex without tearing.

THE MATH
joint volume (cu in) = linear feet × 12 × width × depth
fluid ounces = cu in × 0.554
tubes = round up( fluid ounces ÷ 10.1 )
Sealant fills a joint of a given width and depth. The volume is the joint cross-section times the length, converted to fluid ounces and then to standard tubes.
Enter the joint length in feet and its width and depth in inches.
A standard tube holds about 10.1 fluid ounces.
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The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.