Blood Donation Calculator

Check your eligibility to donate blood, calculate when you can donate next, and understand blood type compatibility.

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Important Health Disclaimer

This calculator provides general health information based on standard medical formulas and WHO guidelines. Results are for informational and educational purposes only and should not be considered as professional medical advice, diagnosis, or treatment recommendations.

For health concerns, medical conditions, fitness plans, or dietary decisions, please consult with qualified healthcare professionals, licensed physicians, registered dietitians, or certified fitness trainers who can evaluate your individual health status and medical history.

Individual health needs vary significantly. These calculations are general estimates and may not be appropriate for everyone, especially those with existing medical conditions, pregnant women, children, or elderly individuals.

Not a substitute for professional medical advice

Your Information

years
g/dL

Donation Eligibility

Eligible to Donate

Eligibility Checks

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Weight:70.0 kg meets minimum
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Hemoglobin:14 g/dL meets minimum
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Age:Age 30 is eligible
Blood Volume
170492 mL
Donation Amount
450 mL
Wait Period
56 days
Annual Limit
6 donations

Blood Type: O Positive

Can donate to:O+, A+, B+, AB+
Can receive from:O+, O-
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