Drywall Compound & Tape Calculator
Calculate joint compound and tape for finishing
Project Details
Typically 28-32 screws per sheet
10% recommended
Results
Enter details and click Calculate to see results
UKUK Building Regulations
References & Sources
⚠️ Compliance Limitations & Mitigations
- Limitation: Joint length is an average half-perimeter proxy (sheet width + height). Sheet count alone cannot determine board layout, room perimeter, openings, or boundary/butt-joint topology.
Mitigation: For a detailed take-off, measure the actual joints requiring tape and finishing and compare them with the proxy output.
Standards Cited
- BS EN 13963 — Jointing materials for gypsum plasterboards — Definitions, requirements and test methods
Defines requirements for plasterboard jointing compounds and tapes - BS 8212 — Code of practice for dry lining and partitioning using gypsum plasterboard
Guidance on joint taping and finishing techniques for plasterboard installations
Formulas Used
- Joint length per sheet:
jointLength = sheetWidth + sheetHeight (accounting for shared edges)
Source: Average half-perimeter estimating proxy — Uses the selected regional sheet dimensions; library calls that omit a size default to 1200x2400mm. - Compound volume:
compound = (jointLength × jointWidth) / coveragePerLitre × numberOfCoats
Source: Manufacturer coverage data — Joint feathering width ~125mm (5 inches) - Screw pop compound:
screwCompound = numberOfPops × 0.005 litres × numberOfCoats
Source: Industry practice
Key Assumptions
- Jointing compound coverage ~1.6 m2 per litre per coat (Gyproc) — Manufacturer data (Gyproc, Knauf)
- Standard tape roll: 75 m — Gyproc / Knauf standard
- Joint length uses the selected sheet size; 1200 x 2400 mm is the default when no size is supplied — BS EN 520