How much exterior paint for a 50×30 ft 1-story house?

A 50×30 ft 1-story house with two gable ends has about 1,391 sq ft of paintable siding after doors, 8 windows and a garage door. Two coats at 300 sq ft per gallon take 9.3 gallons — buy 10 gallons. One coat takes about 5 gallons.

Change the numbers

The calculator below is pre-filled for this project. Adjust any value — including feet and inches — and the results update instantly.

Gables are measured across the house width. Trim, doors and shutters usually take a separate quart or gallon of trim paint.

Your results

Exterior paint to buy10 gallons

As packaged2 five-gallon buckets

Paintable area1,391 sq ft

Exact paint (2 coats)9.27 gal

Walls + gables1,440 + 225 sq ft

Doors & windows subtracted274 sq ft

Primer, if needed (1 coat)5 gallons

How much exterior paint for a 50×30 ft 1-story house — diagram

Gallons by siding type (2 coats)

Coverage	Exact gallons	Buy	As packaged
400 sq ft/gal	7	7 gallons	1 × 5 gal + 2 × 1 gal
350 sq ft/gal	7.9	8 gallons	1 × 5 gal + 3 × 1 gal
300 sq ft/gal	9.3	10 gallons	2 × 5 gal
250 sq ft/gal	11.1	12 gallons	2 × 5 gal + 2 × 1 gal

Where the area comes from

Walls: 2 × (50 + 30) × 9 ft × 1 = 1,440 sq ft
Two gables at a 6/12 pitch: 225 sq ft
Openings subtracted: 274 sq ft

Measure your own house — porches, bump-outs and dormers change the total. Trim usually needs another 1–2 gallons of trim paint.

Common questions

How many gallons of paint for a 50x30 1-story house?

About 10 gallons for two coats on 1,391 sq ft of siding at 300 sq ft per gallon.

Want the full method, tips and other sizes? See the exterior paint calculator guide.

Last reviewed November 1, 2026. Results are estimates — confirm with your supplier.

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