Grout calculators and tools
Free tools that turn the rules on this site into numbers for your job. Every calculator shows its formula and assumptions, so you can check the math and adjust for the product you buy.
Grout Calculator: How Much Grout Do I Need?
Estimate pounds, bags or gallons of grout from tile size, thickness, joint width and area.
Grout Type Selector: Which Grout Should I Use?
Five questions, a ranked recommendation, and the reasoning behind it.
Grout Problem Diagnoser: What Is Wrong With My Grout?
Choose a symptom and one detail to get the most likely cause and the right guide.
Grout Color Visualizer: Preview Tile and Grout Combinations
Preview tile and grout color pairs in common layouts with a measured contrast rating.
Grout Sealer Calculator: How Much Sealer Do I Need?
Work out sealer quantity and linear feet of grout for applicator or full-surface sealing.
Grout Joint Width Calculator (ANSI 3x Variation Rule)
Turn measurements of your actual tiles into the minimum joint width that the standard allows.
Grout Cure Time Planner: When Can I Walk, Shower or Seal?
Get dated milestones for walking on, wetting, sealing and fully curing new grout.
Explore other guides
Grout Basics
What grout is, what it does, what it cannot do, how long it lasts and how to handle it safely.
Grout Science
The chemistry and physics behind curing, shrinkage, color, porosity and strength.
Grout Types
Every grout family, the standards behind them and how to choose the right one.
Comparisons
Head-to-head matchups with side-by-side tables and a clear recommendation.
Joint Width and Layout
How wide and deep grout joints should be, and where grout must stop for movement joints.
Grout by Tile Type
Grout choice, joint width and pitfalls for each tile material.
Grout by Location
Where the tile lives changes the right grout: wet, hot, outdoor, submerged or commercial.
How to Grout
Mixing, floating, sponging, haze removal and curing, done the way pros do it.
Grout Problems
Symptom-first diagnosis: what you see, what causes it and how to fix it.
Repair and Regrouting
Patch, remove and regrout correctly, and know when the problem is below the grout.
Cleaning and Stains
Safe cleaning methods, the right chemistry for each soil, and stain-by-stain fixes.
Sealing Grout
Which grouts need sealing, which sealer to use, how to apply it and how to test it.
Research and Data
Original reference tables and analysis computed from first principles.