Grout Calculator
NEWEnter your tile dimensions, grout gap, and tiled area to calculate exactly how much grout you need. Supports sanded, unsanded, and epoxy grout with density-based weight estimates.
How to use Grout Calculator
- Enter your tile width, height, and thickness in millimeters.
- Set the grout gap width (typically 2-5 mm depending on tile size and look).
- Enter the total tiled area in square meters (use our Tile Calculator first if needed).
- Select your grout type and click Calculate to see volume in liters and kilograms.
What is Grout Calculator?
Grout fills the joints between tiles. This calculator estimates the total length of grout joints across your tiled area, then multiplies by gap width and tile thickness to determine volume. A waste factor is applied to account for spillage and tooling loss.
Sanded grout (1.6 kg/L) is used for joints wider than 3mm. Unsanded grout (1.5 kg/L) is for narrow joints up to 3mm, typically on wall tiles. Epoxy grout (1.8 kg/L) is for wet areas and heavy-duty applications. Always check the manufacturer's coverage chart on the bag for confirmation.
FAQ
- What type of grout should I use?
- Use unsanded grout for joints narrower than 3mm (common for wall tiles). Use sanded grout for joints 3mm and wider (floors, large-format tiles). Epoxy grout is best for showers, pools, and kitchen counters where moisture and stain resistance matter. Always follow the manufacturer's recommendations.
- How accurate is this grout estimate?
- This calculator uses engineering formulas based on total joint length and provides a close estimate. Actual usage varies with tile surface texture, installer technique, and job site conditions. The 10% waste factor gives a safe margin, but always buy one extra bag.
- Can I use this for mosaic tiles?
- Yes, but be aware that mosaic sheets have many small tiles with many joints, so grout usage will be higher than for large-format tiles. Enter the individual mosaic piece dimensions and actual gap between pieces for the best estimate.
Related tools
- Tile Calculator
- Wall Area Calculator
- Flooring Calculator
- Drywall Calculator
- Concrete Calculator
- Plaster Sand & Cement Calculator
People also use
- Tile Calculator🚧 Construction Calculators
Calculate tiles needed for floor or wall. Enter tile size, grout gap, area to get count, boxes, cost & visual grid layout. Free, private, no sign-up.
- Wall Area Calculator🚧 Construction Calculators
Calculate paintable wall area for rooms. Subtract doors, windows & custom openings. Per-room breakdown with layout view. Free private tool.
- Flooring Calculator🚧 Construction Calculators
Free online flooring calculator. Calculate square footage, boxes needed, and cost for hardwood, laminate, vinyl, and tile flooring with waste factor.
Last updated: