100 sq ft of 12×24 tile with a 1/8 in joint needs about 5.2 lb of Keracolor S — buy 1 × 25-lb bag.
| Joint | Grout | Amount | Buy |
|---|---|---|---|
| 1/16 in | Keracolor U | 1.9 lb | 1 × 10-lb bag |
| 1/8 in | Keracolor S | 5.2 lb | 1 × 25-lb bag |
| 3/16 in | Keracolor S | 7.8 lb | 1 × 25-lb bag |
| 1/4 in | Keracolor S | 10.3 lb | 1 × 25-lb bag |
| Grout | Joints | Buy | Cost |
|---|---|---|---|
| Keracolor S | 1/8 in–5/8 in | 1 × 25-lb bag | $14.48 |
| Polyblend Plus sanded | 1/8 in–1/2 in | 1 × 7-lb box | — |
| Ultracolor Plus FA | 1/16 in–3/4 in | 1 × 10-lb bag | $20.54 |
| PERMACOLOR | 1/16 in–1/2 in | 1 × 8-lb bag | $20.99 |
| Keracolor U | 1/16 in–1/8 in | 1 × 10-lb bag | $13.48 |
| Polyblend Plus non-sanded | 1/16 in–1/8 in | 1 × 10-lb bag | — |
| Prism | 1/16 in–1/2 in | 1 × 17-lb box | — |
| Fusion Pro | 1/16 in–1/2 in | 2 × 1-qt tub | — |
| Prism SCG | 1/16 in–1/2 in | 1 × 1-gal pail | — |
| Flexcolor CQ | 1/16 in–1/2 in | 1 × 1-gal pail | $54.98 |
| LATICRETE RTU | 1/16 in–1/2 in | 1 × 1-gal pail | $58.85 |
| Kerapoxy CQ | 1/16 in–3/8 in | 1 × 1-gal kit | $120 |
| SPECTRALOCK PRO | 1/16 in–1/2 in | 2 × mini unit | — |
| CEG-Lite | 1/16 in–1/2 in | 1 × 9.5-lb unit | — |
Floor & Decor prices checked October 2026.
| Joint | Grout | Amount | Buy |
|---|---|---|---|
| 1/16 in | Keracolor U | 1.9 lb | 1 × 10-lb bag |
| 1/8 in | Keracolor S | 5.2 lb | 1 × 25-lb bag |
| 3/16 in | Keracolor S | 7.8 lb | 1 × 25-lb bag |
| 1/4 in | Keracolor S | 10.3 lb | 1 × 25-lb bag |
Rectified porcelain can take a 1/16 in joint, but most installers use 1/8 in on 12×24 to absorb slight size and warp differences.
Pre-mixed and epoxy grouts are sold by the pail or kit: compare them in the calculator above — they cost more but need no sealing.
The full method, material data and tips are on the main grout calculator page.