Garage Paint Calculator
Garage walls benefit from durable, scuff-resistant paint that can handle everyday wear and tear. Our estimates below are for a standard two-car garage. Garages often have bare drywall or concrete block, so primer is strongly recommended for best coverage.
Pre-Calculated Paint Estimate
Low
5.0
gal
Likely
5.6
gal
High
6.4
gal
Primer Needed
3
gallons
This range covers 684 square feet with 2 coats. The likely estimate is 4.89 gallons before the selected buffer. If you are buying whole gallons, plan on 6.
Epoxy-based or garage floor paint recommended for durability. Standard latex works for walls.
View Detailed Breakdown
Based on a 20x20 ft room with 9-ft ceilings, 1 door(s), and 1 window(s). Paint at 400 sq ft/gallon with a 15% buffer.
Before using the preset
Measure this room without the usual shortcuts
The result above is a worked example using the dimensions and openings shown in the breakdown. Use these room-specific checks before treating it as a shopping quantity.
- 1 Measure the large overhead door as a custom opening. This preset does not automatically subtract a garage door.
- 2 Confirm whether the walls are finished drywall, bare block, or previously painted masonry before using the preset coverage rate.
- 3 Estimate the ceiling separately because many garages have a larger or sloped ceiling area.
Tips for This Room
- Use a durable satin or semi-gloss finish for garage walls - flat paint scuffs too easily.
- Prime new drywall or bare concrete block before painting for proper adhesion and coverage.
- Light colors (white, light gray) brighten garages and make finding tools easier.
- Consider epoxy-based floor paint separately for the garage floor - regular wall paint will not hold up.
Frequently Asked Questions
How much paint do I need for a 2-car garage?
This 20x20 preset uses about 5.6 gallons for two coats on new drywall, so plan on 6 gallons of finish paint. It also includes about 3 gallons of PVA primer. A large overhead door should be deducted separately.
What kind of paint should I use in a garage?
Use interior latex paint with a satin or semi-gloss finish for garage walls. These finishes are more durable and easier to clean than flat paint. For garage floors, use a dedicated epoxy or concrete floor paint.
Do I need to prime garage walls before painting?
Yes, primer is strongly recommended for garages, especially if the drywall is new, bare, or unpainted. PVA drywall primer is the best choice for new drywall. Use a bonding primer for previously painted glossy surfaces.