If you’ve ever looked at water usage reports, you might have encountered the term “acre-foot” or “acre-feet.” This unit of measurement is essential for understanding water rights and large-scale water management.

So, what exactly is an acre-foot?

Imagine a football field-sized plot of land (that’s about an acre) covered in one foot of water. That’s the volume of an acre-foot. To put it in numbers, one acre-foot equals:

• 43,560 cubic feet
• 325,851 gallons

Why is it important?

Acre-feet are often used to measure water storage in reservoirs, water delivery for irrigation, or the amount of water allocated under water rights agreements. Depending on usage patterns, an acre-foot of water might be enough to serve one or two single-family households for an entire year.

Water Rights and the Acre-Foot.

Water rights are a complex topic, but in essence, they are property rights that allow someone to use water from a particular source. These rights are often quantified in acre-feet, specifying the amount of water a person or entity is entitled to use.

Use Our Calculators.

Need to convert gallons to acre-feet and so on?  Use our calculators.

Let’s keep learning!

If you’re curious about water measurement and rights, here are some resources to explore:

• Colorado River District: Water Glossary: [https://www.coloradoriverdistrict.org/water-glossary/]
• Denver University Water Law Review: [https://digitalcommons.du.edu/cgi/viewcontent.cgi?article=2848&context=wlr]
• Wikipedia: Acre-Foot: [https://en.wikipedia.org/wiki/Acre-foot]