How to Choose the Right Size Cremation Urn: A Simple Guide

Choosing a cremation urn is a deeply personal decision, often made during an emotional time. Beyond style and material, one of the most practical considerations is to ensure you select the correct size. An urn that’s too small won’t hold all the ashes, while one that’s too large might feel impractical or unnecessary. Here’s a straightforward guide to help you get it right.

Understanding Cremation Urn Capacity

Cremation urn sizes are measured in cubic inches, which refers to the volume of space inside. The general rule of thumb is simple: you’ll need about one (1) cubic inch of space for every pound of body weight before cremation. For example, if your loved one weighed 150 pounds before cremation, a 150-cubic-inch urn should be what you need. This accounts for the average volume of cremated remains, which typically ranges from 3 to 9 pounds depending on the person’s size and bone density.

Step-by-Step Process for Buying the Right Size Urn

1. Know the Weight: The most reliable starting point is the individual's pre-cremation body weight.
2. Calculate Capacity: Use the 1:1 ratio (1 pound = 1 cubic inch). If the person weighed 180 pounds, look for an urn with at least 180 cubic inches of capacity.
3. Round-Up if Unsure: If you’re between sizes or uncertain about exact weight, it’s better to choose a slightly larger urn. A little extra space is preferable to not having enough.
4. Check with the Crematory: Cremation providers often include a temporary container (usually around 200 cubic inches). Ask them to confirm the volume of ashes to double-check your estimate.

>> More information on buying a Cremation Urn

Types of Cremation Urns and Their Sizes

Urn sizes vary depending on their purpose:

• Standard Adult Urns: These are typically 175 to 300 cubic inches and are designed to hold a single person’s remains. Most people fall within this range.
• Companion Urns: Built for two people (like a couple), these usually start at 400 cubic inches and go up, assuming combined weights.
• Keepsake Urns: Small urns (3-25 cubic inches) for sharing ashes among family members or keeping a token amount. These are often paired with a larger urn.
• Child or Infant Urns: Sized from 10 to 100 cubic inches, depending on the age and weight of the child.

Pet Urns: Similar to human urns, pet urns follow the same 1:1 rule based on the animal’s weight. It is also important to note that choosing an urn larger than the minimum required size is perfectly acceptable. Many families use the additional space within the urn for their pet's favorite toy or collar.

Other Factors to Consider When Deciding What Size Cremation Urn to Buy

• Scattering Plans: If you plan to scatter most of the ashes and keep only a portion, a keepsake urn might be all you need.
• Display Space: Larger urns take up more room. Consider where the urn will be placed—on a shelf, mantel, or niche. If you purchase niche space, it’s best to check with the cemetery to ensure you know the dimensions that will work in the niche.
• Material Density: What material the urn is made of can impact final capacity. For example, a ceramic or wooden urn may have slightly thicker walls than a metal one. Check product descriptions for exact cubic inches, not just external dimensions.
• Custom Orders: Some providers offer tailored sizes if standard options don’t fit your needs.

Common Mistakes to Avoid

• Guessing Without Measuring: Eyeballing an urn’s size can lead to surprises. Always check the listed capacity. If you are still unsure, contact the seller.
• Forgetting Extra Space: Ashes might come with a bag or container that takes up a bit more room inside the urn. An unusual shape can also affect your ability to insert a plastic bag.
• Overcomplicating It: The 1:1 rule works for 95% of cases—don’t overthink it unless you’re dealing with unusual circumstances.

Final Thoughts

Picking the right size cremation urn doesn’t have to be overwhelming. Begin with the weight, match it to cubic inches, and consider how the urn fits into your broader plans. It’s a small but meaningful way to honor your loved one, ensuring their resting place feels just right. If you’re still unsure, most funeral homes or urn suppliers are happy to guide you—don’t hesitate to ask.

Take your time, and let practicality and sentiment guide you. If you keep the guidelines in mind, you are sure to make the right choice to create the perfect memorial.