Cremation Weight Calculator
Estimate ash weight after cremation and the recommended urn size. Toggle between pounds and kilograms for international use.
Works for humans and pets (dogs/cats).
Inputs
Quick Examples
Estimated Results
Ashes (estimate)
4.5
lb
Range
3.6–6.3
lb
Recommended urn capacity
180 cu in
Rule of thumb: ~1 cubic inch per 1 lb of body weight
Estimates vary by bone density, age, and equipment. Consult your funeral provider for exact guidance.
Frequently Asked Questions
How much do ashes weigh after cremation?⌄
Ashes typically weigh about 2–3.5% of the body mass. Adult cremains often fall between roughly 4–8 lb (1.8–3.6 kg).
What urn size do I need?⌄
A common guideline is ~1 cubic inch per 1 lb of pre-cremation body weight. This calculator shows the suggested capacity for your input.
Does this apply to pets?⌄
Yes. The same method applies to pets such as dogs and cats—enter their pre-cremation weight in lb or kg.
Urn Size Guide
A common guideline is ~1 cubic inch per 1 lb of pre-cremation body weight. The table below shows examples to help choose the right urn size.
| Pre-cremation weight | Recommended urn size |
|---|---|
| 120 lb (54 kg) | ≈ 120 cubic inches |
| 150 lb (68 kg) | ≈ 150 cubic inches |
| 180 lb (82 kg) | ≈ 180 cubic inches |
| 200 lb (91 kg) | ≈ 200 cubic inches |
| 220 lb (100 kg) | ≈ 220 cubic inches |
Note: Some urn designs list capacity in liters or cubic centimeters; 1 cubic inch ≈ 16.387 cc.