Tip: Typical practice uses backer rod and a triangular bead. Depth is often about half the joint width. Adjust to match manufacturer guidance and job conditions.
Global Settings
Applies to segment lengths.
Applies to joint width and depth.
Covers squeeze-out, tooling, and waste.
Custom
Set when “Custom volume” is selected.
Segments
Define each distinct joint run below.
| # | Length | Width | Depth | Profile | Volume |
|---|
Total Sealant Volume
Estimated Tubes
Example Data
| Area | Length | Width | Depth | Profile |
|---|---|---|---|---|
| Window perimeter | 48 ft | 3/8 in | 3/16 in | Triangular |
| Tile shower corner | 7 ft | 1/4 in | 1/8 in | Round |
| Floor expansion joint | 12 m | 10 mm | 5 mm | Triangular |
Use “Load Example” to insert similar rows for quick testing.
Formulas Used
- Conversions: 1 m = 1000 mm; 1 ft = 304.8 mm; 1 in = 25.4 mm; 1 mL = 1000 mm³; 1 US fl oz = 29.5735 mL.
- Cross‑sectional area
- Triangular bead:
A = 0.5 × width × depth - Rectangular bead:
A = width × depth - Round bead (circular):
A = π × (width/2)²(uses width as diameter; depth ignored)
- Triangular bead:
- Segment volume:
V = A × length(all in mm, mm², mm³). - Total with wastage:
V_total = ΣV × (1 + waste% / 100). - Tubes needed:
tubes = V_total / V_tube, whereV_tubeis tube volume in mm³; purchase uses ceiling.
Note: For corners, “round” often approximates a fillet bead. Always follow manufacturer recommendations for joint design and tooling.
How to Use
- Pick length and width/depth units to match your measurements.
- Select a bead profile. Triangular suits backer rod with two‑sided adhesion.
- Enter segment length, joint width, and joint depth for each run.
- Set wastage to cover tooling and losses; 5–15% is typical.
- Choose tube size or enter a custom volume.
- Press Recalculate to update totals, then export CSV or PDF if needed.
FAQs
Triangular beads over backer rod are common for movement joints. Rectangular suits simple fills. Round approximates corner fillets. Confirm with sealant manufacturer and relevant standards.
A frequent rule is depth about half the width, using backer rod to control depth. Wide joints may need caps or special designs per datasheets.
This tool converts internally. Choose global units that match your tape. The example rows show both imperial and metric use cases.
Yes. Increase the wastage percentage. Many projects use 5–15% depending on crew experience and surface texture.
Common cartridges are about 10.1 fl oz, but 29 fl oz are also used. Always check the label; enter a custom volume whenever packaging differs.
The math applies to linear beads in general. However, coverage varies with product rheology and tooling. Use results as planning guidance and verify onsite.
Disclaimer: Calculations are approximations. Always follow product datasheets, local codes, and professional judgment.