PRP Platelet
Dose Calculator
Estimate total platelet dose and platelets per mL, plan a blood draw, and calculate the dose in each region from your preparation.
New to PRP dose calculations? Start here.
- Enter the preparation inputs. Use the patient’s platelet count, blood volume excluding anticoagulant, and recovery data for your protocol. The quick-value buttons provide estimates when those data are unavailable.
- Enter the final PRP volume. This is all of the PRP you prepared. Platelets per mL tells you how much platelet dose each milliliter contains.
- Plan the volume you will use. Name each treatment area and enter its PRP volume in the region planner below to see assigned doses and the amount remaining. Review the inputs before copying or printing.
01 / Preparation
Start with your inputs.
The 250,000/µL default represents a rounded average adult platelet count. Use the patient’s CBC when available. Enter platelets per microliter (µL): 250 × 10³/µL or 250 × 10⁹/L equals 250,000 here.
Exclude anticoagulant. For example, a 60 mL collection containing 6 mL anticoagulant has 54 mL of whole blood.
Platelets retained from the blood draw. The 80% default is a planning estimate for higher-recovery preparations; actual recovery varies by system and protocol.
The total PRP volume after preparation, before dividing it into syringes or regions.
02 / Estimated results
Total platelet dose available
6 mL prepared · assign portions in the region planner below
- Platelets per mL
- 2 billionplatelets in each 1 mL of PRP2,000,000 platelets/µL
- Concentration factor
- 8×concentration relative to whole blood
- Platelets in blood draw
- 15 billion
Count: 250,000/µL
Recovery: 80%
Leukocyte content (user-reported): Unknown / not characterized
The 250,000/µL default is a rounded estimate representative of an average adult platelet count. The 80% recovery default is a planning estimate for higher-recovery preparations, not an established average across PRP systems. Use patient-specific and system-specific values when available.
Divide your preparation
See the dose for each region.
Name the treatment area and enter the PRP volume assigned to each region. Use one region for a single injection or add regions to divide the preparation. Estimated doses assume uniform mixing.
Preparation allocation
of 6 mL prepared
2 billion platelets assignedPRP available to allocate
10 billion platelets remaining1 of 6 mL assigned · 5 mL remaining.
Volumes are planning inputs, not recommended doses for a particular condition. Totals include completed regions. Copied and printed summaries include their treatment-area labels and doses, and identify any regions still awaiting a volume.
No patient identifiers needed. Calculator inputs stay in your browser and are not saved.
Plan from a target
How much blood would you need?
Work backward from a target total prepared platelet dose using your whole-blood platelet count and estimated recovery.
The prefilled 10-billion target is an illustrative planning example, not an established treatment threshold.
The total platelets you want in the entire PRP preparation, before dividing it among regions.
250,000/µL · 80% recovery
Illustrative platelet doses by blood-draw volume
These examples assume a whole-blood platelet count of 250,000 platelets/µL and 80% platelet recovery, held constant across blood-draw volumes. Actual recovery may vary with the system, draw volume, and preparation protocol.
| Whole blood collected (excluding anticoagulant) | Estimated prepared platelet dose |
|---|---|
| 30 mL | 6 billion |
| 60 mL | 12 billion |
| 90 mL | 18 billion |
| 120 mL | 24 billion |
These are fixed reference examples and do not change with the calculator inputs above. Final PRP volume changes concentration, but does not change total prepared dose when the recovered platelet quantity stays the same.
Understand the estimate
Dose and concentration answer different questions.
With 250,000 platelets/µL, 60 mL of whole blood, and 80% recovery, the estimated preparation contains 12 billion platelets.
Illustrative PRP comparison
12 billion platelets in each preparation
2 billion/mL platelet concentration
8× whole-blood concentration
4 billion/mL platelet concentration
16× whole-blood concentration
Illustrative whole-blood baseline: 250,000 platelets/µL.
The total prepared dose stays at 12 billion if the same recovered platelets are suspended in a smaller volume. Injecting only 3 mL of a 6 mL preparation delivers an estimated 6 billion platelets, assuming uniform mixing.
Why use 250,000 platelets/µL?
It is a rounded estimate representative of an average adult count, not a fixed value for every patient. A U.S. population analysis of 17,969 adults reported a mean of approximately 236,000/µL. Counts vary among individuals and with age, sex, and health status. Use the patient’s CBC when available. Wongsaengsak et al. (2019).
How are the numbers calculated?
Whole-blood platelets = count (platelets/µL) × blood volume (mL) × 1,000.
Prepared platelets = whole-blood platelets × recovery (%) ÷ 100.
Platelets per mL = prepared platelets ÷ final PRP volume (mL).
To express PRP concentration per µL, divide platelets per mL by 1,000. One mL contains 1,000 µL.
Concentration factor = PRP platelets per µL ÷ whole-blood platelet count per µL.
Dose in a region = platelets per mL × PRP volume used in that region (mL).
Required blood (mL) = target total prepared platelets ÷ [count × 1,000 × recovery fraction]. One billion is 1,000,000,000 platelets.
What does platelet recovery mean?
Recovery describes the proportion of platelets in the blood draw captured in the final preparation. It differs from the concentration factor: a small final volume can create a high concentration even when recovery is modest.
The 80% default is a planning estimate, not an established average across common systems. In a small comparison of five commercial systems, mean recovery ranged from approximately 56% to 94% across the tested preparations, including two settings for one device. System, settings, and preparation technique matter. Degen et al. (2017).
Published PRP characterization frameworks distinguish injected dose from preparation efficiency. Recovery depends on the system and preparation process. Magalon et al., DEPA classification (2016).
What do leukocyte-poor and leukocyte-rich mean?
Leukocytes are white blood cells. LP-PRP generally has a lower leukocyte concentration than baseline whole blood; LR-PRP generally has a higher concentration. Classification conventions vary, so measured cell counts provide more detail than the label alone. Magalon et al., DEPA classification (2016).
Use measured counts or reliable characterization data for your specific system and preparation protocol. Reporting neutrophil and red-cell content adds useful information alongside platelet and leukocyte counts. PRP characterization consensus (2023).
The optional selection records the type you report. This tool does not measure leukocytes or confirm LP-PRP or LR-PRP, and neither label determines platelet dose or recovery.
What can this calculator tell me clinically?
It estimates platelet quantities from the inputs you provide. It does not measure the final product, establish a therapeutic dose, or predict treatment response. Patient-specific blood counts and reliable system or protocol recovery data improve the relevance of the estimate.
The model assumes uniform platelet distribution and no additional losses after preparation. It does not characterize leukocytes, red cells, platelet function, activation, growth factors, or other product attributes. Blood collection volume must also fit the patient and the device protocol.
If a valid final PRP platelet concentration is available, calculate dose directly from that measurement. A count reported per µL must be multiplied by 1,000 to convert it to platelets per mL; then multiply by the injected volume in mL.
Calculation summary
MSK Logic | PRP Platelet Dose Calculator Whole-blood platelet count: 250,000 platelets/µL Whole blood collected: 60 mL, excluding anticoagulant Platelet recovery: 80% Final PRP volume: 6 mL Leukocyte content (user-reported): Unknown / not characterized. This type is not calculated or verified by the tool. Estimated platelets in blood draw: 15,000,000,000 Estimated platelets prepared: 12,000,000,000 (12 billion) Estimated platelets per mL: 2 billion (2,000,000,000 platelets/mL) Equivalent PRP concentration: 2,000,000 platelets/µL (8× baseline) Regional allocation from the full preparation (assuming uniform mixing): Region 1: 1 mL = 2 billion platelets Assigned: 1 mL (2 billion); remaining: 5 mL (10 billion) Illustrative target total prepared dose: 10 billion; estimated whole blood required: 50 mL, assuming the same platelet count and recovery. The 250,000/µL default is a rounded estimate representative of an average adult platelet count. The 80% recovery default is a planning estimate for higher-recovery preparations, not an established average across PRP systems. Use patient-specific and system-specific values when available. Mathematical estimates, not measured PRP characteristics or a treatment recommendation. Assumes uniform platelet distribution and no additional losses after preparation. https://msklogic.com/tools/prp-dose-calculator
Understand the reasoning behind the calculation.
Review platelet dose versus concentration and a worked PRP example.
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