Paint Can Measurements and Coverage Calculator
Direct Answer: Standard US paint can measurements include 1-Gallon cans (6.5" diameter × 7.5" height, covering 350–400 sq ft) and Quart cans (4.25" diameter × 4.88" height, covering 85–100 sq ft). Use our paint can measurements calculator below to convert wall area into exact cans needed.
A 1-Gallon can (128 oz) covers 350 to 400 sq ft (one average bedroom coat). A Quart can (32 oz) covers 85 to 100 sq ft (doors, trim, or a small accent wall).
There are 4 Quarts in 1 Gallon. If your project needs more than 2 Quarts, buying a full 1-Gallon can is cheaper and leaves extra paint for touch-ups.
Room Paint Coverage Calculator
Pick a room preset or enter your room size to see how many cans to buy:
Quick Reference: Paint Can Sizes, Dimensions & Coverage
Compare standard US paint containers by fluid volume, physical can size, coverage, and best project use:
| Can Size | Volume (US / Metric) | Can Size (Diameter × Height) | 1-Coat Coverage | Best Used For |
|---|---|---|---|---|
| Sample | 8 fl oz (0.24 L) | 3.0" × 2.5" (7.6 × 6.4 cm) | ~20–25 sq ft | Testing wall color swatches |
| Pint | 16 fl oz (0.47 L) | 3.5" × 4.0" (8.9 × 10.2 cm) | ~45–50 sq ft | Small furniture, chairs, crafts |
| Quart | 32 fl oz (0.95 L) | 4.25" × 4.9" (10.8 × 12.4 cm) | ~85–100 sq ft | Doors, window trim, cabinets |
| 1 Gallon | 128 fl oz (3.78 L) | 6.5" × 7.5" (16.5 × 19.1 cm) | ~350–400 sq ft | Standard bedrooms & living rooms |
| 5-Gallon Pail | 640 fl oz (18.9 L) | 12.0" × 14.5" (30.5 × 36.8 cm) | ~1,750–2,000 sq ft | Whole-house interior or exterior |
3 Common Paint Buying Mistakes to Avoid
Buying 3 Quarts Instead of 1 Gallon
Individual quarts cost roughly $20 to $28 each, while a full 1-gallon can (equal to 4 quarts) often costs $45 to $65.
Skipping Primer on Bare Drywall
Unprimed drywall and fresh spackle soak up paint rapidly, cutting your coverage from 350 sq ft down to 220 sq ft per gallon.
Not Mixing ("Boxing") Separate Cans
Two cans tinted on the same day can still have tiny color differences that leave a visible line in the middle of a wall.
Frequently Asked Questions
What are the standard paint can sizes?
Common sizes are the 8 fl oz sample, pint (16 fl oz), quart (32 fl oz), gallon (128 fl oz) and the 5 gallon bucket (640 fl oz).
What are the dimensions of a 1 gallon paint can?
A 1 gallon paint can is approximately 6.5 inches wide and 7.75 inches tall. A quart can is approximately 4 inches wide and 4.5 inches tall, and a 5 gallon bucket is approximately 12 inches wide and 14.5 inches tall. Exact sizes vary by manufacturer.
How many ounces are in a can of paint?
A gallon is 128 fluid ounces and a quart is 32 fluid ounces. A pint is 16 and a sample size is about 8 fluid ounces.
What is the smallest paint can size you can buy?
Most home improvement and paint stores sell samples of about 8 fluid ounces. Availability varies by store and brand, so check with your local store.
How much area does a gallon of paint cover?
About 350 to 400 square feet per coat. A quart covers roughly a quarter of that, and a 5 gallon bucket roughly 1,750 to 2,000 square feet. Use the calculator above for your room.
Do paint can sizes vary by brand?
The volume names (quart, gallon) are standard, but can height, diameter and lid design differ slightly between brands. Check the product listing if the can must fit a specific holder or storage shelf.