Epoxy Grout Calculator

Calculate epoxy grout needed from tile size, joint width, and joint depth — pounds or kilograms, with units to order.

Calculate Epoxy Grout Needed for Your Tile Job

Enter your tile length and width, joint width, joint depth, and total area to grout. The calculator returns the epoxy grout needed in pounds or kilograms — switch units any time — with an adjustable waste allowance (0% by default). Add your product's unit size to also see how many units to order.

Unit System
Usually matches your tile's thickness for a fully filled joint.
Enter your product's unit size to see how many units to order.
0%5%10%15%20%
Covers routine mixing and application loss — 10% is typical, more for heavily textured or mosaic tile.

Epoxy Grout Results

100 sq ft · includes a 0% waste allowance

Total Epoxy Grout Needed24.75 lbsRaw amount 24.75 lbs + 0% waste
Coverage Rate0.2475 lb/sq ft

Still need your total area? Use the Square Meter & Square Foot Calculator →

Grout weight is estimated using a standard epoxy grout density of ~0.22 lb per cubic inch applied to your tile size, joint width, and joint depth — actual consumption varies by manufacturer, tile texture, and installation method. This total includes the 0% waste allowance set above. Volumes here are estimates only; always confirm coverage against your product's Technical Data Sheet (TDS) or manufacturer's coverage chart before ordering. Trade Epoxy is not responsible for miscalculations, material shortfalls, or job outcomes arising from use of this calculator — see our full Disclaimer for details.

How the Epoxy Grout Calculator Works

  1. Choose Imperial (in / lb) or Metric (mm / kg) units
  2. Enter your tile length and width
  3. Enter the joint width and joint depth — joint depth usually matches tile thickness
  4. Enter the total area to be grouted
  5. Set a waste allowance if you want a buffer — 0% by default, 10% is typical
  6. Optional: enter your product's unit/kit size to see how many units to order
  7. Read the total grout needed, plus the coverage rate per sq ft or m²

Examples

Scenario12 × 12 in tile, 100 sq ft floorInputImperial · 12 in × 12 in tile · 1/8 in joint · 3/8 in depth · 100 sq ft · 0% wasteResult24.75 lbs of epoxy grout (11.23 kg)
Scenario4 × 4 in mosaic tile, wider jointInputImperial · 4 in × 4 in tile · 3/16 in joint · 1/4 in depth · 50 sq ft · 10% wasteResult40.84 lbs of epoxy grout (18.52 kg)
Scenario300 × 300 mm tile, metric jobInputMetric · 300 mm × 300 mm tile · 3 mm joint · 8 mm depth · 20 m² · 0% wasteResult19.49 kg of epoxy grout (42.96 lbs)

Frequently Asked Questions

How is epoxy grout usage calculated?

This calculator uses the standard tile-grout estimating formula: [(tile length + tile width) ÷ (tile length × tile width)] × joint width × joint depth × grout density × area. That works out the total joint volume across your tiled area, then converts it to weight using a standard epoxy grout density of about 0.22 lb per cubic inch.

What joint depth should I use?

For a fully filled joint, joint depth should match your tile's thickness — a 3/8 in (10 mm) porcelain tile gets a 3/8 in deep joint. If you're grouting a shallower reveal, for example over a backer rod or on a very thick paver, enter that shallower depth instead.

Why does epoxy grout need a different calculation than cement grout?

Epoxy grout is a filled resin system, not a sand-and-cement mix, so it has a different density than sanded or unsanded cementitious grout. This calculator uses the density figure specific to epoxy grout — running an epoxy job through a cement-grout calculator (or vice versa) will give you the wrong quantity.

Does this account for differences between epoxy grout brands?

This gives a standard estimate based on typical epoxy grout density. Exact coverage varies by manufacturer, tile surface texture, and application method — squeegee versus bag application can both change how much grout ends up in the joint versus on the tile face. Always check your product's Technical Data Sheet or coverage chart before finalizing an order, especially on large jobs.

What waste allowance should I use?

The waste allowance slider starts at 0%, so the default total is the raw calculated amount. Add 10% to cover routine mixing and application loss on a straightforward job; bump it to 15–20% for heavily textured tile, mosaic sheets, or the first time you're using a new product and don't yet know how it handles.

How do I find my total area to grout?

If you haven't already measured your floor or wall area, use the Square Meter & Square Foot Calculator to get an accurate total, then enter that figure here.

Important Notes

  • Grout weight is calculated from tile size, joint width, and joint depth using a standard epoxy grout density of ~0.22 lb per cubic inch — the TCNA-based tile grout formula
  • Joint depth should match tile thickness for a fully filled joint — enter a shallower figure only if you are intentionally leaving a reveal
  • Actual coverage varies by manufacturer, tile texture, and application method — always confirm against your product's coverage chart or Technical Data Sheet before ordering
  • Enter your product's unit/kit size to see exactly how many units to order, rounded up
Square Meter & Square Foot CalculatorMeasure your floor or wall area in m² and ft² before running the grout numbers.Concrete Crack Repair CalculatorThe same length × width × depth volume math, sized for filling cracks and joints instead of tile grout lines.Resin Mixing Ratio CalculatorGet exact Part A and Part B quantities for any custom mix ratio and batch size.

Epoxy Grout vs. Cement Grout: Why the Difference Matters for Estimating

Epoxy grout is a two- or three-part resin system, not a sand-and-cement mix, which is why it behaves — and estimates — differently from sanded or unsanded cementitious grout. It's stain-resistant, chemical-resistant, and waterproof enough to skip sealing entirely, which makes it the default choice for commercial kitchens, showers, and heavy-traffic floors. That performance comes at a real cost per pound, so an accurate estimate matters more here than it does on a cheap bag of cement grout: order short and a job stalls waiting on a rush shipment; order too much and you've paid for resin that sits on a shelf. The volume math is universal — joint width × joint depth × total joint length, which the tile-length-and-width term above works out for you — but the density that turns that volume into a weight is specific to epoxy, which is exactly what this calculator uses.