Garage Square Foot Calculator

Q: How much epoxy do I need for my garage floor?

One gallon of epoxy typically covers 200-250 sq ft. A 400 sq ft 2-car garage needs about 2 gallons of epoxy coating. Most kits include enough for 200-500 sq ft.

What is garage square footage?

Garage square footage is the total floor area of a garage measured in square feet. A 1-car garage is 240-300 sq ft (22.3-27.9 m²). A 2-car garage is 400-576 sq ft (37.2-53.5 m²). A 3-car garage is 600-900 sq ft. For an attached driveway slab, use the driveway calculator; for the concrete pour, the concrete calculator.

Getting started

How to Calculate Garage Square Footage

To calculate garage square footage, measure length and width of the garage floor in feet and multiply length × width. A standard 20 × 20 ft (6.1 × 6.1 m) 2-car garage equals 400 sq ft (37.2 m²).

1. Measure floor

Measure length and width of the garage in feet. Standard 2-car garage is 20 × 20 ft.

2. Subtract storage

Subtract permanent cabinets and workbench footprint when calculating epoxy coverage.

3. Plan epoxy or coating

Garage epoxy kits typically cover 200-500 sq ft each. Divide garage area by kit coverage.

Quick reference

Reference

1 acre = 43,560 square feet

1 square yard = 9 square feet

1 square meter = 10.764 square feet

1 square inch = 0.00064516 square feet

Material pricing

Calculate Cost of Materials

Garage floor epoxy costs $3-12 per sq ft DIY or $5-15 installed. Multiply garage area by price per unit for total coating cost.

There are 2 steps to calculate material cost:

Enter the price per kit and the coverage in square feet listed on the kit label.
The Square Foot Calculator divides garage area by kit coverage and multiplies by kit price.

A 400 sq ft garage needs 1-2 epoxy kits. Add primer, etching solution, and tools to the budget. Buy slightly extra to ensure full coverage.

FAQ

Frequently Asked Questions

How do I calculate garage square footage?

Measure the interior length and width in feet and multiply. A 20x20 ft garage is 400 square feet. Measure from wall to wall, not including the wall thickness.

How many square feet is a 2-car garage?

A standard 2-car garage is 400-576 square feet (20x20 to 24x24 ft). Larger 2-car garages with workshop space can be 600-800 sq ft.

How much epoxy do I need for my garage floor?

One gallon of epoxy typically covers 200-250 sq ft. A 400 sq ft 2-car garage needs about 2 gallons of epoxy coating. Most kits include enough for 200-500 sq ft.

How many square feet is a 1-car garage?

A standard 1-car garage is 200-260 square feet (10x20 to 12x22 ft). This provides space for one vehicle with minimal storage.

How much does garage flooring cost per square foot?

Epoxy coating costs $3-7/sq ft, interlocking tiles cost $2-8/sq ft, and rubber matting costs $3-10/sq ft. A 400 sq ft garage floor epoxy project typically costs $1,200-2,800 installed.

Does garage square footage count in home appraisals?

No, garage space is typically not included in a home's total living area square footage. However, garage size is listed separately and does add to overall property value.

REFERENCES

Garage Square Foot
Calculator — Floor Area

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