Tile Grout Calculator
Calculate how much grout you need for your tile project.
Enter tile size, area, and grout joint width for bags needed.
Grout Needed
Grout estimation uses tile size, joint width, tile depth, and total area.
Grout volume = Area × Joint width × Tile depth × (Tile width + Tile height) / (Tile width × Tile height)
This is then converted to pounds/kg and divided by bag coverage.
Unit support:
- Imperial: tile in inches, area in sq ft, grout in lbs
- Metric: tile in cm, area in m², grout in kg
Standard grout joint widths:
- Rectified tiles: 1/16" (1.5 mm) — minimal grout lines
- Standard wall tile: 1/8" (3 mm)
- Standard floor tile: 3/16" (5 mm)
- Natural stone: 1/4" (6 mm)
- Outdoor / rustic: 3/8" (10 mm)
Bag coverage (approximate):
- 25 lb bag of sanded grout: covers ~100–200 sq ft depending on tile size and joint width
- 10 lb bag of unsanded grout: covers ~60–120 sq ft with narrow joints
Tips:
- Use unsanded grout for joints 1/8" or less
- Use sanded grout for joints wider than 1/8"
- Buy 10–15% extra for waste