Calculate exactly how much cement and sand you need for plastering any wall or ceiling. Enter your plaster area below for an instant material estimate.
Plaster Calculator — Cement & Sand Estimate
Cement Bags (50 kg)
—
Sand (cubic ft)
—
Dry Mortar (cu ft)
—
Water (litres approx)
—
Includes 10% wastage. 1 cement bag = 1.25 cu ft. Verify with your site engineer.
Save or share — branded with Civil Technologist.
Frequently Asked Questions
How much cement for 100 sq ft plaster?
For 12mm thick plaster with 1:6 mortar, approximately 1.5 to 2 cement bags (50kg) are needed per 100 sq ft.
What is the standard plaster thickness?
Internal walls: 12mm. External walls: 15-18mm. Ceilings: 6mm.
What is the best mortar ratio for plaster?
1:6 (cement:sand) for internal walls, 1:4 for external walls exposed to weather.