How many epoxy kits do I need for my garage?

You need 1 kit for every 100 square feet of floor. Measure length x width, divide by 100 and round up. A 1 car garage takes 2 kits, a 2 car garage takes 4, and a 2.5 car garage takes 5.

That is the whole rule. 1 kit covers 100 sq ft. No guessing. No surprises. The rest of this post shows you how to measure, how to handle odd shaped floors, and why trying to make fewer kits cover more floor backfires.

The coverage rule

Each indoor quartz sand epoxy self leveling garage floor kit covers 100 sq ft at a target thickness of about one eighth inch. That thickness is what lets the coating level out, hold the quartz aggregate evenly and give you the textured stone look and grip.

The same 100 sq ft rule applies to the outdoor washed stone quartz epoxy floor kit, which covers up to 100 sq ft per kit. Use the outdoor kit for outdoor jobs. The indoor kit is for garages, shops, basements and interior concrete, not patios, driveways, pool decks or direct sun.

Common garage sizes and kit counts

These are typical sizes. Your garage may be bigger or smaller, so always measure before you order.

Garage size	Approximate floor area	Kits needed
1 car	200 sq ft	2 kits
2 car	400 sq ft	4 kits
2.5 car	500 sq ft	5 kits
3 car	about 600 sq ft	6 kits

How to measure your garage floor

1. Clear the floor edges. You want to measure wall to wall, not cabinet to cabinet, unless the cabinets are permanently fixed and you are not coating under them.
2. Measure the length and width in feet. Use a tape measure along the floor, not up at the ceiling. If you get feet and inches, convert the inches to a fraction of a foot (6 inches is 0.5 ft).
3. Multiply length x width. That gives you square feet.
4. Divide by 100. That is your kit count before rounding.
5. Round up. Always. A result of 4.1 means 5 kits, not 4.

Example: a garage that measures 22 ft by 20 ft is 440 sq ft. 440 divided by 100 is 4.4. Round up to 5 kits. This is the most common surprise we see on the phone. Plenty of 2 car garages are bigger than 400 sq ft, and rounding down is how people end up short in the middle of a pour.

Irregular shapes, bump outs and steps

Not every garage is a clean rectangle. Here is how to handle the odd ones:

• L shapes and bump outs. Split the floor into rectangles. Measure each one, multiply each length x width, and add the totals together. Then divide by 100 and round up once, at the end.
• Workshop nooks and storage alcoves. Measure them as their own rectangles and add them in. They are easy to forget and they always count.
• Steps or a raised landing. If you are coating them, measure the top surface of each step and add it in.
• Angled walls. Measure to the longest point to form a rectangle. You will round up anyway, so a little extra area in the math is fine.

If your layout is unusual, call us at 602.600.0781 with your measurements and we will check the count with you. Phone support is free with every kit.

Why stretching coverage fails

It is tempting to buy 3 kits for a 400 sq ft floor and spread a little thinner. Do not do it. Here is what happens:

• It will not level. A self leveling coating needs enough material to flow. At less than the target thickness, it stays where the squeegee left it, and you get ridges and streaks.
• The finish looks uneven. Streaky or poorly leveled floors are one of the problems our installation guide traces to applying too thin. The fix listed there is to use the full 100 sq ft per kit.
• The quartz does not sit right. Uneven base coat and uneven aggregate are what cause uneven color. A thin coat makes both harder to control.
• You run out mid pour. Pot life is 20 to 30 minutes after mixing begins, and you mix one kit at a time. Running short means stopping, ordering more and trying to blend a new batch into a section that has already started to set.

The right number of kits is cheaper than redoing a floor. For more on what goes wrong and how to avoid it, read what can go wrong with an epoxy floor.

Plan your pour around the kit count

Your kit count is also your batch count. Each kit is mixed with a drill and mixing paddle for 3 to 5 minutes, then poured and spread in 100 to 150 sq ft sections, starting in the far corner and working toward the door. A 4 kit garage means 4 batches, each one defoamed with the spiked roller right after it goes down.

Tools you will want ready before the first batch:

• 22 inch squeegee with pole ($29.99)
• 20 inch defoaming roller ($39.99)
• Extension pole ($24.99)

Primer is not included in the kit and is sold separately. If your concrete is porous or older, previously painted or sealed, or has had moisture issues, plan for it. The full process is in our installation instructions, and if you are still deciding whether to tackle it yourself, start with can you epoxy your own garage floor.

Budgeting by kit count

The indoor kit is $249 in Marble Grey or Desert Grey and $300 in Black. For a typical 2 car garage, 4 kits run $996 in the grey colors or $1,200 in Black. Add about $95 for a squeegee, roller and pole if you do not own them, plus primer if your floor needs it. For a full side by side with pro install pricing, see what it costs to epoxy a two car garage.

Do you need an extra kit?

If you measured carefully and rounded up, no. Rounding up already builds in a little margin. Buy one extra only if you want spare material on the shelf for future touch ups. Small touch ups can be made with additional kit material, so some people like having it on hand. It is a choice, not a requirement.

Looking for local tips? Our city planning guides cover common garage sizes and conditions by area. Phoenix area customers can pick up at our Queen Creek shop with no freight charge, and we ship nationwide.

Quick answers

How many epoxy kits do I need for a 2 car garage?

Most 2 car garages are about 400 sq ft, so you need 4 kits. Measure your own floor to confirm, because sizes vary.

How do I calculate how many epoxy kits I need?

Multiply length by width in feet to get square feet, divide by 100, and round up to the next whole kit. A 22 by 20 ft garage is 440 sq ft, which is 5 kits.

Can I make 3 kits cover a 400 sq ft garage?

No. Each kit covers 100 sq ft at about one eighth inch thick. Spreading it thinner keeps the coating from leveling and leaves a streaky finish.

Should I buy an extra kit?

Only if you want spare material for future touch ups. If your math is right and you rounded up, you do not need an extra kit to finish the floor.