Grout Calculator
Enter your tile size, joint width and depth, and area to get real pounds and bags of grout needed.
The filled depth, not the full tile thickness.
100 lb/cu ft is a common estimate. Use your product's published yield if you have it.
Grout needed
6.4 lb
25lb bags needed
1 bags
This estimates joint volume from your tile and joint dimensions, then converts it to weight using a grout density figure -- 100 lb per cubic foot is a common estimate, but a product-specific yield (if your bag lists one) will always be more accurate.
Keep going
- Grout volume depends on how many tiles and how wide the joints are; the tile calculator works out the tile and box count for the same job first. Tile Calculator
Frequently Asked Questions
Do I use the tile thickness or the joint depth?
Joint depth -- the actual filled depth of the grout line, which is often less than the tile's full thickness once you account for thinset and the tile's own profile. Using tile thickness instead of real filled depth is one of the most common ways this kind of estimate comes out too high.
Why does tile size change how much grout I need?
Smaller tiles mean more joints per square foot -- more total joint length and volume to fill -- even though the total area being tiled hasn't changed. Larger tiles need less grout for the same floor.
What density should I use?
100 lb per cubic foot is a common estimate for cementitious grout if you don't have a product-specific number. If your grout bag lists a yield (cubic feet covered per pound), use 1 divided by that yield as your density instead -- it'll be more accurate for that specific product.