# Select Urns Urn Size Calculator

Canonical URL: https://selecturns.com/pages/urn-size-calculator

Purpose: Estimate the minimum cremation urn capacity needed for an adult, loved one, dog, cat, or other pet based on body weight before cremation.

Primary sizing rule: Use at least 1 cubic inch of internal urn capacity for each 1 pound of body weight before cremation.

Metric conversion: If weight is provided in kilograms, convert kilograms to pounds first using pounds = kilograms * 2.20462. Then estimate the recommended urn capacity in cubic inches.

Calculator formulas:
- Pounds: recommended_capacity_cubic_inches = ceil(weight_pounds)
- Kilograms: recommended_capacity_cubic_inches = ceil(weight_kilograms * 2.20462)

Accepted subjects:
- Adult or loved one
- Pet

Product matching logic used by the page:
- Adult/loved-one urns: products tagged Human and Urn
- Pet urns: products tagged Pet Urn
- Capacity source: product tag formatted as CAP:###
- Match rule: show products whose CAP value is greater than or equal to the entered weight in pounds

Practical guidance:
- Choose an urn whose stated internal capacity is equal to or larger than the calculated estimate.
- Choose slightly larger when unsure, especially if the cremated remains will stay inside the inner bag.
- Check exterior dimensions separately for cemetery niches, vaults, travel containers, or display spaces.
- Capacity guidance is an estimate and does not guarantee an exact fit in every case.

Related pages:
- Adult urns: /collections/adult-urns
- Pet urns: /collections/pet-urns
- Extra large urns: /collections/extra-large-urns
- Keepsake urns: /collections/keepsake-urns