Gallons per Square Foot Calculator (2024)

FAQs

How do you calculate gallons per square foot? ›

To calculate gallons of water per square foot, follow these steps: Convert the height H into feet to get H ft . Multiply H ft by 7.48052 to get gallons of water in one square foot: G = H ft × 7.48052 .

The result is the cubic feet of space the tank holds. Multiply the result by 7.48. The answer is the number of gallons of water the tank holds. 7.48 is a the number of gallons in a square foot of space.

Multiply the square footage to be watered by . 62 gallons or 1 inch of water per square foot. Example: 1,000 square feet x . 62 gallons = 620 gallons.

Most typically, a gallon of paint covers anywhere from 350 to 400 square feet, so a gallon of paint is enough to cover a small space like a bathroom.

Length x width x depth x 7.5 = volume (in gallons)

Multiplying that by the depth gives the volume in cubic feet. Since there are 7.5 gallons in each cubic foot, multiply the cubic feet of the pool by 7.5 to arrive at the volume of the pool, expressed in gallons.

To determine this, we have to go back to the basics of geometry to measure area and volume. However, a few measurements will always remain the same. Therefore, an “inch of water” is 0.62 gallons per square foot of garden area.

* Note: 1,000 sq. ft. of water one inch deep is approximately 625 gallons.

For most lawn care companies, the typical spray rates are: 1.5 gallons per 1,000 sq. ft.

Since our rate is 3oz/1000 this means that one gallon of spray mix could cover 5,333 sq ft. If we had a 2 gallon sprayer like the Field King we have been using in this series, that would be 2 gallons of spray mix (224 oz water, 32 oz RGS) and could cover 10,666 sq ft.

Rule-of-thumb

One gallon can of paint will cover up to 400 square feet, which is enough to cover a small room like a bathroom. Two gallon cans of paint cover up to 800 square feet, which is enough to cover an average size room. This is the most common amount needed, especially when considering second coat coverage.

How to calculate square footage? ›

Measure the length and width, in feet, of each room. Then, multiply the length by the width to calculate that room's square footage. For example: If a bedroom is 12 feet by 20 feet, it is 240 square feet (12 x 20 = 240).

Any liquid, when applied at a thickness of one mil (1/1000 inch) will cover 1604 square feet per gallon. Another way to state this is that one gallon of any liquid, applied over a 100 square foot surface, will be 16 mils thick when wet.

Q: How many square feet does a 5-gallon bucket of paint cover? A: A 5-gallon bucket of paint can cover up to 2000 square feet of space.