Tapered Joint Compound Wet Volume calculator.
Calculate compound for a supplied trapezoidal wet joint-band cross-section along measured joint lengths.
Your inputs
Use measurements from your plan and properties from your chosen product. Any prefilled values are illustrative.
A clear estimate starts here.
Enter your dimensions and product details to see the quantity and purchase breakdown.
Formula and assumptions
How this calculation works.
Calculate compound for a supplied trapezoidal wet joint-band cross-section along measured joint lengths. Cross-section = (base width + top width) / 2 × wet depth; tubs = ceil(total length × cross-section × allowance / usable tub volume).
A worked example
Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.
- Specified band base width
- 50 mm
- Specified feathered band top width
- 200 mm
- Specified maximum wet band depth
- 2 mm
- Usable compound volume per tub
- 5 L
- Your additional material allowance
- 0 %
- Measured run length
- 10 m
- Identical runs
- 4
Compound tubs for a supplied tapered band: 2 tubs
One supplied trapezoidal wet cross-section along measured joints. It does not specify finish level, coats, drying shrinkage, sanding loss or corner treatment.
Before you purchase
Use dimensions from your plan and properties from your chosen product. Any design spacing, section or fixing pattern must already be specified.
All product dimensions, coverage, density, allowances and joining rules must come from your supplied plan or selected product. No building-code values are inserted.
Method: dimensional arithmetic and user-supplied specifications. Software checks: 2026-10-05. Calculation and review policy.