How many tubes of caulk for a bathtub?
A standard 5 ft bathtub set against three walls has about 10 feet of tub-to-wall joint. At a 1/4 in bead that is 0.36 of a 10.1 fl oz tube: buy 1 tube.
How to work it out
- Bead: π × (0.25 in ÷ 2)² · one 10.1 fl oz tube ÷ bead = 30.9 ft per tube
- 10 ft × 1.1 extra ÷ 30.9 ft = 0.36 → 1 tube
A bathtub alcove is three walls around a 5 ft tub: about 5 ft along the back and 2½ ft up each end. That 10 ft of joint takes about a third of a cartridge, so one tube does the tub with enough left for the vertical corners of the surround.
Adjust for your project
More options: Extra (left in the tube and nozzle, tooling)
- One tube runs
- 30.9 ft
- Tubes, before rounding up
- 0.36
- Caulk needed
- 3.6 fl oz
- Yield is for a round bead of the size chosen, the way DAP rates its caulk (55 ft from a 10.1 oz tube at 3/16 in). A tooled bead pressed into a corner uses about the same.
How far one tube goes, by bead size
| Bead | One tube runs | Tubes to buy |
|---|---|---|
| 1/8 in | 124 ft | 1 tube |
| 3/16 in | 55 ft | 1 tube |
| 1/4 in | 30.9 ft | 1 tube |
| 3/8 in | 13.8 ft | 1 tube |
| 1/2 in | 7.74 ft | 2 tubes |
What to know about caulking a tub
- 10 ft of joint, a third of a tube. At a 1/4 in bead one 10.1 fl oz tube runs about 31 ft.
- Vertical corners. The two inside corners of a tiled surround, 5–6 ft each, add 10–12 ft: still one tube.
- The floor side. If you caulk the tub apron to the floor too, add another 5 ft.
- Small tubes. A 2.8 fl oz squeeze tube runs about 8.6 ft at 1/4 in, not quite enough for the tub alone.
Use a sealant made for tubs and showers, usually silicone, and fill the tub with water before you caulk so the joint is at its widest when the bead cures. Remove the old caulk completely first and let the joint dry. A shower stall has more joint: a 3 × 3 ft base plus two corners 6 ft tall is about 21 ft, roughly two-thirds of a tube.
Painting the bathroom too? See how much paint for a small bathroom. The full yield chart is on how many feet of caulk in a tube.
Different size? Use the full Caulk Calculator (Tubes and Feet per Tube).
What you’ll need
- Dripless caulk gunBudget price
A smooth-rod, dripless gun stops pushing when you stop squeezing, which is most of what makes a neat bead.
See options on Amazon (opens in a new tab) - Caulk finishing toolBudget price
Shapes a consistent bead and lifts the excess cleanly, especially in tub and shower corners.
See options on Amazon (opens in a new tab) - Snap-off utility knife and bladesBudget price
Wallpaper and drywall both reward a fresh blade. Snap often.
See options on Amazon (opens in a new tab)
As an Amazon Associate we earn from qualifying purchases. Links to products are affiliate links — they cost you nothing extra and help keep these calculators free.
Frequently asked questions
How many tubes of caulk for a shower?
A 3 × 3 ft shower with two 6 ft corners is about 21 ft of joint: 0.75 tubes at 1/4 in, so 1 tube.
How many tubes of caulk for a tub surround?
The tub joint plus two 6 ft corners is about 22 ft: 1 tube at a 1/4 in bead.
Other common sizes
- How many feet of caulk in a tube — 30.9 ft at a 1/4 in bead (55 ft at 3/16 in)
- How many tubes of caulk per window — 0.57 of a tube: about 2 windows per tube
Sources
- DAP, Alex Plus Acrylic Latex Caulk Plus Silicone, technical data sheet (5/12/25) (opens in a new tab) — 10.1 fl oz: 55 linear ft at a 3/16 in diameter bead; 5.5 fl oz: 30 ft; joints no wider than 1/2 in × 1/2 in deep without backer rod.