Is there a weight requirement to donate blood?
What this means
- The common minimum is 110 pounds (50 kilograms).
- Donors aged 16 to 18 may need to meet a height and weight table.
- The requirement helps keep donation safe for you.
What to do next
If you are near the minimum, confirm the exact requirement with the center.
When to call the center: Call if you are a younger donor unsure about the height and weight table.
Why this rule exists
Minimum weight helps ensure donating a standard amount is safe for your body.
This is general educational guidance, not a final eligibility decision. Donation centers make final eligibility decisions during confidential screening. Rules may vary by center, donation type, location, and current policy.
Find a place to donate
Search by city, ZIP, state, or center name, or use your location to see the closest centers.
Related questions
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Read the full pledgeSources and review
The guidance on this page reflects published criteria from these organizations. Eligibility and procedures vary by center and country, so confirm specifics with your donation center.
- American Red Cross
- AABB (Association for the Advancement of Blood & Biotherapies)
- U.S. Food and Drug Administration, Blood Donation
- Canadian Blood Services
- Last reviewed:
- Next review due:
- Reviewed by:
- Reviewed against American Red Cross, AABB, and U.S. FDA donor guidance
- Confidence:
- High confidence