Funeral Home Directory USA
Cremation · 6 min read

What Happens During Cremation?

Step by step from identification and authorization to the cremation chamber, processing and the return of the remains.

Updated October 6, 2026 · Reviewed by the Funeral Home Directory USA editors

During cremation, the body is placed in a combustible container and moved into a cremation chamber (often called a retort), where intense heat reduces it to bone fragments over a few hours. Those fragments are then cooled, checked for metal, processed into a fine, sand-like material and returned to the family in a temporary container or an urn. Before any of that happens, the crematory must confirm the person's identity and receive written authorization and the permits required by state law.

This guide walks through each step in order, so you know what to expect and what questions to ask a crematory or cremation provider.

Step 1: Authorization and paperwork

Cremation is permanent, so every state requires formal permission before it can take place. The typical sequence:

  1. Authorizing agent signs a cremation authorization form. This is usually the legal next of kin, in an order set by state law (often a designated agent, then a spouse, then adult children, then parents, and so on). Some states require all members of a class, such as all adult children, to agree.
  2. Death certificate is completed. A physician or medical examiner certifies the cause of death, and the funeral director files the certificate. See how to get a death certificate.
  3. Cremation permit is issued. Many states require a separate cremation permit, and many require the medical examiner or coroner to review and authorize cremation, because cremation removes the possibility of a later examination.
  4. Waiting period passes. Many states set a minimum waiting period after death before cremation can occur, often 24 to 48 hours.

Delays at this stage are common and usually involve the death certificate signature or medical examiner review rather than the crematory itself.

Step 2: Identification

Reputable crematories treat identification as the most important part of the process. Practices vary, but commonly include:

  • A family member or the funeral home visually identifying the person, or confirming identity from a photo.
  • A metal identification disc with a unique number assigned when the body arrives. The disc stays with the body through cremation and is placed with the cremated remains afterward.
  • Logs or tracking records that follow the case from intake to release.

It is reasonable to ask the provider exactly how identity is tracked and whether the ID disc will be returned with the remains.

Step 3: Preparation of the body

Preparation for cremation is usually simple:

  • Medical devices are removed. Pacemakers and some other battery-powered implants must be taken out beforehand, because they can explode under high heat and damage the equipment. Tell the funeral home about any implants you know of.
  • Jewelry and personal items are removed unless the family asks otherwise. Anything left on the body will generally not be recoverable, so decide in advance.
  • Embalming is not needed. Embalming is not required for cremation in most cases, though it may be done if there is a public viewing first. See embalming explained.

The body is placed in a rigid, combustible container. Under the FTC Funeral Rule, a funeral home offering direct cremation must make an inexpensive alternative container available (for example, unfinished wood, pressed wood or heavy cardboard), and it cannot require you to buy a casket for cremation. Some families choose a cremation casket or a rental casket for a viewing.

Step 4: The cremation chamber

The container is moved into the cremation chamber, a furnace lined with heat-resistant brick. According to commonly cited figures, including those from the Cremation Association of North America, the chamber operates at roughly 1,400 to 1,800 degrees Fahrenheit, and a cremation typically takes a few hours. Body size and the type of container affect the time.

The heat and evaporation reduce the body to bone fragments. Soft tissue, the container and most organic material are consumed. Most crematories cremate one person at a time, and the chamber is cleared before the next cremation. Ask your provider to confirm this.

Can the family watch?

Many crematories allow a small number of family members to be present when the body is placed into the chamber, sometimes called a witness cremation. Some faith traditions, including many Hindu families, value this step. Not every facility has a viewing room, and there may be an extra fee, so ask early.

Step 5: Cooling and processing

After cremation, the chamber cools, and the operator carefully sweeps out the remaining bone fragments. Then:

  • Metal is removed. Surgical screws, plates, joint replacements and casket hardware are separated, often with a magnet and by hand. Many crematories send recovered metals to specialized recyclers. Ask what the policy is if this matters to you.
  • Fragments are processed. A machine called a processor (or cremulator) reduces the bone fragments to a uniform, coarse powder.

The result is what people call "ashes," although it is really processed bone. Adult cremated remains typically weigh about 3 to 7 pounds, a commonly cited range, depending mainly on the person's bone structure.

Step 6: Return of the remains

The remains are placed in a sealed plastic bag inside a temporary container or the urn the family selected, with the identification disc. The funeral home or crematory then releases them to the authorized person, usually with a certificate of cremation.

How long this takes varies. Many families receive remains within one to two weeks of death, but permits and paperwork can make it longer. For a typical timeline, see how long after death is a funeral.

After cremation: your options

Cremation leaves many choices open, and none must be made right away:

  • Burial in a cemetery plot or urn garden
  • Placement in a columbarium niche
  • Scattering, following state and local rules and permission from property owners
  • Keeping the urn at home
  • Dividing remains among family members in keepsake urns
  • Memorial jewelry containing a small portion of remains

A memorial or funeral service can be held before cremation (with the body present) or afterward with the urn. For the full picture of costs, read how much does cremation cost, and for the simplest option, direct cremation explained.

Questions to ask a crematory

  • Do you own and operate your own crematory, or use a third party?
  • How do you track identity from intake to release?
  • Can family be present for the start of the cremation?
  • How long until remains are returned?
  • What is included in the price, and what are the separate fees (permits, death certificates, medical examiner fees)?
  • What happens to medical devices and recovered metals?

You can compare local providers by browsing crematories and cremation services, or by state on the states page.

Frequently asked questions

Is the body cremated in a casket?

The body is cremated in a rigid, combustible container, which can be a simple alternative container or a cremation casket. The FTC Funeral Rule says a funeral home cannot require you to buy a casket for direct cremation and must make an alternative container available.

Are people cremated one at a time?

In the United States, crematories generally cremate one person at a time, and the chamber is cleared between cremations. Small amounts of residue can remain, which is why reputable crematories follow strict cleaning and tracking procedures. Ask your provider about its practices.

What happens to dental gold, implants and jewelry?

Jewelry is usually removed before cremation unless the family instructs otherwise. Metal implants are separated after cremation, and many crematories send them to a recycler. If you want items returned, tell the funeral home in writing before cremation.

How hot is a cremation chamber?

Commonly cited figures, including from the Cremation Association of North America, put the operating temperature at roughly 1,400 to 1,800 degrees Fahrenheit. The process typically takes a few hours, followed by cooling and processing.

Why is there a waiting period before cremation?

Many states require a waiting period, often 24 to 48 hours, and medical examiner or coroner authorization because cremation is irreversible. These rules give time to confirm the cause of death and the identity of the person and to resolve any objections.