Next Eligible Donation Date
Enter the date of your most recent donation and donation type to learn when you can safely donate again according to standard interval guidelines.
Standard whole blood donation. Minimum 8 weeks (56 days) between donations.
How to Use This Calculator
Record your last donation
Choose the calendar date of your most recent donation. If unsure, reference your donor card or center app.
Select donation type
Intervals differ for whole blood, double red cell, platelet, and plasma donations. Pick the procedure you underwent.
Plan your next appointment
Review the calculated eligibility date and schedule with your local blood center. Ensure you meet all health criteria before donating.
Formula
Next eligible date = Last donation date + Interval (days)
Intervals: Whole blood 56 days; Double red 112 days; Platelet 7 days; Plasma 28 days.
Full Description
Donation intervals protect donors by allowing adequate time to replenish blood components. Regulatory guidelines vary slightly by country and collection agency. Whole blood donors typically wait 8 weeks, whereas apheresis procedures have shorter or longer intervals depending on the component removed. Always verify requirements with your collection center, especially if you have medical conditions or recent travel exposures.
Frequently Asked Questions
What if I donated multiple component types?
Follow the longest required interval. For example, after a double red donation you must wait 112 days even if platelets can be donated sooner.
Do medical conditions change the interval?
Some conditions or medications require longer deferrals. Always review eligibility questionnaires from your collection center.
Can I donate early if I feel well?
No. Minimum intervals are mandated to protect donor health. Schedule at or after the calculated date.
How do time zones affect the date?
The calculator uses your device’s local time. Eligibility is based on calendar days; donating on the next calendar day after the interval is acceptable.