This tool is part of these guided projects. Each project provides step-by-step instructions with checklists and all the tools you need in one place.
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Calculate how many floor or wall tiles you need. Enter room size, tile dimensions, grout gap, and waste percent for accurate tile count and coverage.
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Calculate carpet square footage and linear feet from room size and roll width. Estimate seams, waste, and total carpet to order for wall-to-wall installation.
Larger trowel notches apply more mortar per square foot, requiring more bags. Large-format and natural stone tiles typically need bigger trowels.
Coverage (sq ft/bag) varies by trowel notch: V-notch ~110, 1/4" square ~90, 3/8" square ~60, 1/2" square ~40Dense porcelain and uneven natural stone require more mortar for proper bond. Mosaic sheets use less per square foot due to smaller individual tile size.
Porcelain × 1.1, Natural Stone × 1.2, Mosaic × 0.8Standard 50 lb thinset bag. Always round up and buy at least one extra bag for waste and partial batches.
Bags = ceil(Area ÷ Adjusted Coverage)Updated: July 2026
Using 1/4" square trowel at 90 sq ft/bag coverage, plan for 2 bags of 50 lb thinset for a standard bathroom floor.
Large format tile requires 1/2" square trowel at ~40 sq ft/bag. Budget 6+ bags for 200 sq ft plus waste.
Estimate thinset mortar quantity for floor or wall tile projects. Different trowel sizes and tile types affect coverage rate — enter your specs for an accurate bag count.