Most graves in the United States today are dug about 4 to 6 feet deep, and the top of the casket or burial vault usually ends up with roughly 18 inches to 3 feet of soil above it. "Six feet under" is a familiar phrase, but it is not a nationwide legal standard. The actual depth depends on state rules, the cemetery's own regulations, soil and water conditions, and whether the grave is single, double depth or a natural burial.
Where "six feet under" comes from
The phrase is often traced to a 1665 order issued in London during an outbreak of plague, which directed that graves be at least six feet deep. Whether or not that order was widely followed, the idea stuck in English-speaking culture as the "proper" depth for a grave. Early American burial grounds did not follow any single rule, and many 18th and 19th century graves were considerably shallower than six feet.
Today the phrase survives mostly as an expression. Cemeteries focus less on the total depth of the hole and more on how much earth covers the casket or vault.
Typical depths today
| Burial type | Typical depth of excavation | Typical cover over the top |
|---|---|---|
| Standard single grave with vault | About 4.5 to 6 feet | About 18 to 24 inches over the vault |
| Double-depth (stacked) grave | About 7 to 9 feet | Upper casket covered similarly to a single grave |
| Natural or green burial | About 3.5 to 4 feet | About 3 feet of soil over the body |
| Cremated remains (urn) | About 2 to 3 feet | Varies by cemetery |
| Infant or child grave | Shallower than adult graves | Set by cemetery and state rules |
These are general ranges, not rules. A given cemetery may dig deeper or shallower depending on its equipment, soil and regulations.
Why most graves are not a full six feet
A modern grave typically holds an outer burial container: a concrete or metal vault or a simpler liner. The container itself is several feet tall. If the cemetery wants about 2 feet of soil on top, the hole only needs to be deep enough for the vault plus that cover, which usually lands somewhere between 4.5 and 6 feet.
Vaults and liners also keep the ground from sinking as a casket breaks down, which is why most memorial parks and many other cemeteries require them. For more on what these containers cost, see how much does a burial cost.
What state rules require
There is no single federal rule on grave depth. Where states address it, the rules usually set a minimum amount of cover over the casket or container rather than a total depth. Requirements commonly fall in the range of about 18 inches to 3 feet of earth on top, with some states having specific rules for burials without a vault or for burials on private land.
Some states have no specific statewide depth rule at all and leave it to local health codes, zoning, or the cemetery. Because rules vary and can change, anyone planning a home or family burial should check with the county health department and local zoning office before digging. Our section on family cemeteries touches on some of the practical issues with private burial grounds.
Factors that change the depth
Soil and water table
In areas with a high water table, such as parts of the Gulf Coast, Florida and low-lying river areas, deep graves can fill with water. Cemeteries there may dig shallower graves, use sealed vaults, or rely on above-ground burial in mausoleums and tombs. New Orleans is the best known example of a place where above-ground burial became common for this reason. You can compare local options on pages like /florida/ or /louisiana/.
Rock and frost
In rocky ground, digging to a standard depth can require special equipment. In the northern states, frozen ground can make winter digging difficult. Some cemeteries in cold climates hold bodies in a receiving vault over winter and complete burials in spring, although modern equipment has made this less common.
Double-depth graves
A double-depth grave is dug deeper at the first burial so a second casket can later be placed on top. The lower casket might sit 7 to 9 feet down. This option is only possible where soil and water conditions allow. See can two people be buried in one plot for how these arrangements work.
Natural and green burial
Green cemeteries generally bury bodies without vaults, embalming, or metal caskets, using a shroud or biodegradable casket instead. Graves are often shallower, commonly around 3.5 to 4 feet, with about 3 feet of soil over the body. The shallower depth keeps the body in the biologically active layer of soil where decomposition happens naturally, while still providing enough cover to prevent odors and disturbance by animals. Our guide on what is green burial explains the approach in more detail.
Old graves and shallow burials
Genealogists and people restoring old burial grounds sometimes discover that historic graves were shallow, sometimes only a few feet deep. Graves were dug by hand, sometimes in hard or frozen ground, and there were no vaults. Over time, wooden coffins collapsed and the ground above them settled, which is why old cemeteries often have gentle depressions marking unmarked graves.
If you are researching or working in an old cemetery, avoid probing or digging without permission from the landowner and, where relevant, state authorities. Many states protect historic burial sites, and disturbing a grave can be a criminal offense even on private land.
What families should know
For most families, grave depth is handled entirely by the cemetery. You generally do not choose it, and there is no extra benefit to asking for a deeper grave unless you are planning a double-depth burial. It is still reasonable to ask:
- Does the cemetery require a vault or liner, and which kinds?
- Is double-depth burial available in the section you are considering?
- Are there seasonal limits on burials?
- For green burial, what depth and cover does the cemetery use?