Grout Needed
0.53 lb
Tiles
196
Cost
$0
Area
1.0 ft²
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Price as of Jun 27, 2026. Product prices and availability are accurate as of the date indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
Inputs
Result
12" / (0.75 + 0.0625) = ~14.8 tiles per row, ~196 tiles total. Gap area × 0.25" depth × 1.15 waste × 0.055 lb/in³.
Inputs
Result
24" / (0.5 + 0.125) = ~38.4 tiles per row, ~1,475 tiles total. Gap area = 576 - 369 = 207 in² × 0.25" × 1.15 × 0.060 lb/in³ ≈ 0.89 lb.
A 12" × 12" mosaic with 3/4" tiles, 1/16" gaps, and 1/4" depth needs about 0.11 lb of unsanded grout (~$0.06). Larger gaps or deeper tiles increase the amount proportionally. Epoxy grout uses the same volume but costs 5–6x more.
| Grout Type | Cost/lb | Best For | Durability |
|---|---|---|---|
| Sanded | $0.40 | Gaps > 1/8" | Good |
| Unsanded | $0.55 | Gaps ≤ 1/8" | Good |
| Epoxy | $2.50 | Wet areas | Excellent |
Use unsanded grout for gaps 1/8" (3mm) or smaller—it is smoother and easier to work into narrow joints. Use sanded grout for gaps wider than 1/8" as the sand prevents cracking in larger joints.
Apply grout diagonally across tile joints with a rubber float. Let it set 15–20 minutes (not fully cure), then wipe excess with a damp sponge. Use a toothpick for tight corners. Seal after 48–72 hours.
Grout becomes firm in 15–20 minutes and workable for cleanup in 20–30 minutes. Full cure takes 24–72 hours for sanded/unsanded grout. Epoxy grout cures in 24 hours and reaches full chemical resistance in 7 days.
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Last Updated: Jul 13, 2026
This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.