What Size Cremation Urn Do I Need? A Simple Sizing Guide

The general rule is that you need 1 cubic inch of urn capacity for every pound of the person's healthy body weight. So a standard adult urn holds about 200 cubic inches, which is enough for the ashes of most adults up to around 200 pounds. Choosing an urn size is one of the first practical decisions families face, and it's simpler than it seems once you know this one guideline. Everlife Memorials has helped families choose the right urn since 2000, and this guide walks you through it gently.

The Simple Rule: 1 Pound = 1 Cubic Inch

Cremated remains ("ashes") are measured by volume, in cubic inches. The widely used guideline is:

> **1 cubic inch of urn space for each pound of the person's healthy body weight.**

For example:

A person who weighed about 150 lbs → needs roughly 150 cubic inches

A person who weighed about 200 lbs → needs roughly 200 cubic inches

Because a standard adult urn holds about 200 cubic inches, it fits the majority of adults. When in doubt, sizing up slightly is always safe.

Urn Sizes at a Glance

Special Situations

• Sharing ashes among family: Many families choose one main urn plus several keepsake urns or pieces of cremation jewelry, so each loved one can keep a small portion.

• Two people together: A companion urn is designed to hold two sets of remains, often around 400 cubic inches.

• Only keeping a portion: If ashes will be scattered or divided, you may only need a keepsake-sized piece.

• Pets: Use the same 1-pound-per-cubic-inch rule based on the pet's weight.
  
  

What If I Don't Know the Exact Weight?

You don't need to be precise. Use the person's approximate healthy adult weight, and if you're unsure, choose the next size up, a slightly larger urn is never a problem, while an urn that's too small is. A standard 200-cubic-inch urn is a safe default for most adults.

Choosing the Urn Itself

Once you know the size, you can focus on what matters most, choosing an urn that feels right. Everlife offers urns in wood, ceramic, glass, marble, biodegradable materials, and more, including keepsakes, companion urns, and travel urns. If you'd like help, our team is glad to talk it through with you at 1-361-852-6868.

Frequently Asked Questions

What size cremation urn do I need for an adult?

Most adults need about 200 cubic inches of urn capacity, based on the rule of 1 cubic inch per pound of healthy body weight. A standard adult urn (around 200 cubic inches) fits the majority of adults.

How do you calculate urn size?

Take the person's approximate healthy body weight in pounds, that number is roughly the cubic inches of urn capacity you need. A 160-pound person needs about 160 cubic inches; a standard adult urn holds ~200.

What is a keepsake urn?

A keepsake urn is a small urn (roughly 3–50 cubic inches) that holds a portion of a loved one's ashes. Families often use several so each member can keep a small amount, alongside a main urn.

What size urn do I need for two people?

A companion urn, typically around 350–400+ cubic inches, is designed to hold the remains of two people together.

What size urn do I need for a pet?

Use the same rule, 1 cubic inch per pound of the pet's weight. Everlife offers pet urns sized for animals of all sizes.

Is it better to get a bigger urn than needed?

Yes. If you're unsure, size up. A slightly larger urn holds the remains comfortably, while an urn that's too small won't fit them.