How much do Cremation Ashes weigh?

The weight of cremation ashes is actually fairly simple to calculate as it correlates to the weight of the body being cremated. In the cremation industry, there is a general rule that cremated ashes weigh approximately 3.5% of the deceased body's weight.

Of course this can vary and there are a number of factors that can affect the 3.5% rule such as bone content. Men and young adults usually have more solid bones than women, children and the elderly, therefore this will affect the overall weight of the person's ashes, but 3.5% is a good estimate to work off so that you know what size cremation urn that you need.

What size cremation urn for ashes will I need?

Cremation urns generally come in sizes that are labelled as 'small', 'medium' or 'large'. Alternatively, they can come named as for 'child' ashes or 'adult ashes'. Although these terms give you a general idea of what size urn is suitable for your loved one's ashes, it is recapacity of the urn and the ashes of body weight which is suitable to fit inside.

For example:

  • Approx Capacity: 3.1 (ltr) / 189 (cu in)
  • Suitable for ashes of body weight up to 86 (kg) / 189 (lbs)
  • Suitable for: Adult
  • For one of our 'medium' sized urns, it may look like this:
  • Approx Capacity: 2.1 (ltr) / 128 (cu in)
  • Suitable for ashes of body weight up to 58.1 (kg) / 128 (lbs)
  • Suitable for: Young adult, infant, pet. 
As you can see our medium urn specs hold the ashes of a body weight much less than the adult urn and we have specified that this is suitable for a 'young adult'.