How Big Is an Acre, Really?

People tell me all the time they want "a couple acres." Then I ask them how big they think an acre is, and I usually get a shrug.

That's normal. Most of us grew up in neighborhoods where lots are measured in feet, not acres. So let's fix that today. By the end of this you'll be able to picture the size of a lot before you ever drive out to it.

The number

An acre is 43,560 square feet.

That number doesn't mean much to most people, so let's turn it into something you can see.

If an acre were a perfect square, each side would be about 208 feet long. That's roughly the length of 14 or 15 pickup trucks parked bumper to bumper on each side.

An acre doesn't have to be square, though. It can be long and skinny or oddly shaped. The square footage is what makes it an acre, not the shape.

Picture a football field

This is the comparison I use most. An American football field, counting the end zones, is a little bigger than an acre. An acre is about three quarters of one.

So if you've ever stood on the sideline of a high school football game, picture most of that field. That's one acre.

What a quarter acre looks like

A quarter acre is 10,890 square feet. If it's square, that's about 104 feet on each side.

That's a very common size for a lot in a town or subdivision. It's plenty of room for a home, a driveway, a yard and maybe a garden. It's not room for a horse.

A half acre is double that. A third of an acre lands in between.

What 5 or 10 acres feels like

Here's where it gets fun. Once you get into multiple acres, the numbers stop being easy to picture.

Five acres is a little less than four football fields. Ten acres is closer to eight. On a flat piece of desert, you can see from one end to the other. In thick woods, you might not be able to see your back corner from your front corner at all.

One thing I've noticed after walking a lot of lots. Shape changes how big a property feels. A long, narrow 5 acres can take a while to walk from front to back. A square 5 acres feels more compact.

Why this matters when you're shopping

Knowing the size helps you avoid two common mistakes.

Buying too small for your plans. If you want an RV pad, a shop, a garden and some room between you and the neighbors, a fifth of an acre is going to feel tight. Remember that setbacks and septic take up part of every lot too, so you can't use every square foot.

Buying too big for your budget. More land usually means a bigger price and more to take care of. If all you want is a weekend camping spot, you may not need 10 acres. Then again, some people just want room to breathe, and that's a good reason too.

I wrote more about matching the land to what you actually want to do in How to Pick the Right Piece of Land.

How to check the size of a lot yourself

Don't just trust the number in the ad. Here's what I do.

• Look up the county record. The appraisal district or assessor will list the acreage. Use the parcel number to find it.
• Look at the shape on a map. A GIS map or a parcel app will show you the lines so you can see if it's square, skinny or odd shaped.
• Use our property map. Every listing of ours has a free property map with the corner GPS coordinates and the length of each side. It's made to the best of our ability, but it's not a survey.
• Get a survey if it matters. If you're going to build near a line, a survey is the only way to know exactly where your corners are. I covered that in Surveys and Title Companies.

A real example

Our lot at 901 White Oak in Horseshoe Bend, Arkansas is a good picture of a quarter acre. It's 0.28 acres, about 104 feet on each side. Electricity and water are available, septic is needed, and it's for site built homes of 800 square feet or more. There are homes already built nearby. It's $3,000 cash, or $75 down plus the $249 doc fee, then $75 a month for 39 months. You can see it here.

Next time you see "1 acre" in a listing, think three quarters of a football field. It makes shopping a whole lot easier.

Jarod