Caulk & Sealant Calculator
Estimate caulk or sealant cartridges from measured joint geometry—no login required.
Part of the Surfaces & Finishes calculators — see all tools in this category.
Caulk / sealant estimate
Estimate filled joint volume, order allowance, whole cartridges, and an optional local cartridge cost from the measured joint profile.
| Net volume | 0.13 US gal |
|---|---|
| Ordered volume | 0.15 US gal |
| Cartridges | 2 × 0.08 US gal |
Current partial result
Order 2 cartridges.
- Filled cross-section
- 0.08 in²
- Joint length
- 32.81 ft
- Net sealant
- 0.13 US gal
- Ordered after allowance
- 0.15 US gal
- The entered depth is filled sealant depth only. Backer rod is excluded from this volume and must be specified separately where required.
- Use the selected cartridge volume and confirm the joint profile and product installation instructions before ordering.
| Material | Net need | Order quantity |
|---|---|---|
| Caulk / sealant | 0.13 US gal (net) | 0.15 US gal (net) (2 packs) |
No prices entered
Cost breakdown
No prices entered. This is not a completed zero-cost estimate.
Partial estimate: missing required categories are shown below and excluded from totals.
| Line | Purchased quantity / unit / basis | Pricing state | Direct price | Entered line tax |
|---|---|---|---|---|
| Caulk / sealant cartridges | 2 count (ordered) | Not priced | — | — |
- Direct priced subtotal
- $0.00
- Selected contingency base
- $0.00
- Contingency rate
- 0%
- Contingency amount
- $0.00
- Before-tax total
- $0.00
- Entered line tax
- $0.00
- Contingency tax (not entered)
- $0.00
- Final total unavailable — enter a price to begin the estimate
- —
Missing price categories: Caulk / sealant cartridges.
Cost by category
No entered prices to chart.
| Category | Cost | State |
|---|---|---|
| Caulk / sealant cartridges | Not priced | not-priced |
Sources
- S05: MAPEI Sealant calculator — Evidence for joint-length, width, depth, and product inputs. Joint design remains product- and project-specific.
How it works and assumptions
Measure the total run of similar joints and choose the filled cross-section that matches the sealant you expect to place: rectangle, right triangle, or round bead. Enter the filled width and depth (or diameter), not an assumed design ratio.
The calculator converts that geometry to net volume, applies only your editable ordering allowance, and rounds cartridges upward only at the packaging step. It keeps net sealant, allowance-adjusted ordered sealant, and purchased cartridges separate.
This estimator does not choose a sealant, backer rod, or joint design. Follow the selected product's applicable instructions for joint preparation, substrate, movement, adhesion, backer rod, and profile.
Sources and revision
Page revision: 2026-10-12