Caulk Tubes Calculator
Count caulk tubes for a total gap length, with a waste allowance.
Quick answer: enter your details below and click Count Tubes — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
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Enter your details below.
How to use
- Measure the total gap length in metres.
- Enter the coverage of one tube.
- Click Count Tubes.
About this tool
Enter the total length of gaps to seal and the coverage of one tube, and the tool adds a 10 percent allowance for starts, stops, and waste before rounding up to whole tubes. The allowance is shown separately.
Frequently asked questions
Should I buy a spare tube?
For a bathroom or kitchen, yes. A spare tube covers touch-ups without a colour or type mismatch.
Can opened tubes be saved?
Briefly, with the tip sealed, but old caulk can cure in the tube, so use fresh tubes for important seals.