How Much Area Does a Ton of Gravel Cover? (Coverage Chart by Depth)

How much area does a ton of gravel cover? About 116 square feet at 2 inches deep, about 77 square feet at 3 inches deep, and about 58 square feet at 4 inches deep. At 6 inches deep, a ton covers only about 39 square feet. Depth drives everything here, so pick your depth before you order.

How many square feet does a ton of gravel cover?

One ton of gravel works out to roughly 0.71 cubic yards, or about 19.3 cubic feet. Spread that volume across your project and the square footage depends entirely on how deep you go.

• 2 inches deep: about 116 sq ft per ton
• 3 inches deep: about 77 sq ft per ton
• 4 inches deep: about 58 sq ft per ton
• 6 inches deep: about 39 sq ft per ton

These numbers assume a working average of 1.4 tons per cubic yard. That is a reasonable middle-of-the-road figure for common crushed stone. Real density runs anywhere from about 1.2 to 1.7 depending on the material and how wet it is, so treat these as solid estimates rather than gospel. Confirm with your supplier before the truck rolls.

Want the math done for you? Plug your numbers into the Gravel Calculator and skip the arithmetic.

How many tons of gravel do I need for 500 square feet?

For 500 square feet at 4 inches deep, you need about 8.6 tons. That is the most common driveway and path depth, so here is the reverse table for areas people actually build.

• 200 sq ft at 4 inches: about 3.5 tons
• 400 sq ft at 4 inches: about 6.9 tons
• 500 sq ft at 4 inches: about 8.6 tons
• 1,200 sq ft at 4 inches: about 20.7 tons

Notice the pattern. Double the area, double the tonnage. Area scales in a straight line, which makes this table easy to stretch. Need 1,000 square feet at 4 inches? That is two 500s, so roughly 17.2 tons.

Why does depth change coverage so much?

Depth and coverage are inversely proportional. A ton of gravel is a fixed lump of volume, about 19.3 cubic feet. Spread it thin and it goes far. Pile it deep and it stops short. Double the depth and you halve the coverage. Every time.

You can see it right in the chart. At 2 inches, a ton covers about 116 square feet. At 4 inches, double that depth, a ton covers about 58 square feet. Exactly half. The relationship holds at any depth you pick, which is why guessing your depth by eye is the fastest way to order wrong.

This is also why two people can both be right when they quote wildly different coverage numbers. One is talking about a 2 inch decorative bed. The other is talking about a 6 inch base under a driveway. Same ton, three times the difference in coverage.

What is the formula for gravel coverage per ton?

The formula is short. Take the 19.3 cubic feet in a ton and divide by your depth in feet:

coverage_sqft = 19.3 / (depth_inches / 12)

Run it for 3 inches. Divide 3 by 12 and you get 0.25 feet. Divide 19.3 by 0.25 and you land on about 77 square feet. That matches the chart, which is a good sign your math is working.

Going the other direction, when you know your area and want tonnage:

tons = area_sqft x (depth_in / 12) / 27 x 1.4

The 27 converts cubic feet to cubic yards. The 1.4 converts cubic yards to tons at that working average density. If your supplier gives you a different density figure for the exact material you are buying, swap it in for the 1.4. That single number is where most of the wobble lives. For more on that conversion, see tons of gravel in a cubic yard.

Why do coverage numbers vary between suppliers?

Three things move the number: density, stone size, and moisture. None of them are marketing tricks. They are real physical differences in what is sitting in the pile.

Density

Different rock weighs different amounts. Dense trap rock packs more weight into the same volume than lighter limestone or lava rock. Since gravel sells by weight but fills by volume, a denser stone gives you fewer cubic feet per ton. Fewer cubic feet means less coverage.

Stone size and shape

Big angular stone leaves big voids between pieces. All that air counts as volume, so coarse material tends to cover more ground per ton than fine, tightly packing material like crusher run or stone dust. Round pea gravel behaves differently again.

Moisture

Wet gravel weighs more. Water fills the voids and adds weight without adding useful stone. Buy a ton of soaked material after a week of rain and part of what you paid for by weight is water. That is not a scam, it is just how a weight-priced product works outdoors.

So when one supplier says a ton covers 100 square feet and another says 120, both may be telling the truth about their own material. Ask them for the coverage figure on the specific product you are buying, then sanity check it against the Gravel Calculator.

Should I order extra gravel?

Yes. Order about 10 percent extra. Two reasons.

First, compaction. Gravel arrives loose and full of air. Once you run a plate compactor over it or let a few months of traffic do the work, that loose volume can shrink by up to about 20 percent. Your 4 inch layer settles into something noticeably thinner. If you ordered the exact loose volume, you finish short.

Second, the ground is never flat. Low spots, ruts, and soft edges eat material you did not plan for. Nobody has ever regretted a small leftover pile. Plenty of people have regretted a second delivery fee for half a ton.

Adding 10 percent to an 8.6 ton order for 500 square feet puts you around 9.5 tons. Round to what your supplier sells in and move on.

Bottom line

A ton of gravel covers about 116 square feet at 2 inches, about 77 square feet at 3 inches, about 58 square feet at 4 inches, and about 39 square feet at 6 inches. Double the depth, halve the coverage. Those figures assume roughly 1.4 tons per cubic yard, and real density runs from about 1.2 to 1.7, so confirm the material with your supplier and add about 10 percent for compaction and uneven ground.

Working the other way, 500 square feet at 4 inches deep needs about 8.6 tons. Run your own dimensions through the Gravel Calculator for an instant answer, or step back to the full guide on how much gravel do I need if you are still working out depth and material.