Acre foot of water calculator

What is an Acre-foot?

An acre-foot is a unit of volume commonly used in the United States to measure large amounts of water. It represents the volume of water needed to cover one acre of land to a depth of one foot. This unit is particularly useful in agriculture, hydrology, and water resource management.

How to use the calculator

1. Enter the length of your water body in feet
2. Enter the width of your water body in feet
3. Enter the depth of your water body in feet
4. Click the "Calculate" button to compute the volume in acre-feet
5. Click "Reset" to clear all inputs and start over

Example

Suppose you have a reservoir that is 500 feet long, 300 feet wide, and has a depth of 20 feet. To calculate the volume in acre-feet:

                Volume = (500 ft × 300 ft × 20 ft) / 43,560 ft³/af
                Volume = 3,000,000 ft³ / 43,560 ft³/af
                Volume ≈ 68.74 acre-feet
                

Applications

The acre-foot is commonly used to:

• Measure water usage in agricultural irrigation
• Calculate water storage capacity in reservoirs
• Estimate water requirements for large-scale farming operations
• Understand household water consumption (typically a household uses about 1/3 acre-foot of water per year)