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Plaster Coverage Calculator
Estimate plaster quantity and bags needed for a wall or ceiling area and thickness.
🧱 Free Online Tool
⚡ Instant Results
📊 Clear Comparison
🔒 100% Free Tool
Free Plastering Tool
Compare Your Options And Get Clear Answers
Estimate plaster quantity and bags needed for a wall or ceiling area and thickness.
Plaster Coverage Estimator
Enter your numbers below for an instant estimate.
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💡 Tip: Dampen absorbent backgrounds first and keep coats even for fewer cracks.
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
Plaster Quick Guide
Typical values for reference.
| Coat | Thickness | Coverage per 25 kg | Note |
|---|---|---|---|
| Skim | 2 mm | 12 m2 | Finish |
| Multi finish | 3 mm | 8 m2 | Walls |
| Backing | 10 mm | 2.5 m2 | Base |
| Bonding | 3 mm | 7 m2 | Prep |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Plaster Coverage Calculator FAQ
Answers to common questions about this calculator.
About 1 kg per mm of thickness.
Around 2 to 3 mm.
Yes, about 10%.
Yes, check the bag.