Reticulocyte count optimal range and reference range
Compiled by Alina Radu, founder of Sera, from the published sources below · Last reviewed November 9, 2026
Sera's bands for Reticulocyte count:
- Optimal 30 – 110 ×10⁹/L (30 – 110 ×10³/μL); out of range below 30 or above 110 ×10⁹/L.
Evidence grade: Published reference interval. A band that primarily reflects a published adult laboratory or population reference interval. It is not necessarily applicable to every assay or laboratory.
All units
| Unit | Optimal | Sufficient | Out of range |
|---|---|---|---|
| ×10⁹/L | 30 – 110 | — | below 30 or above 110 |
| ×10³/μL | 30 – 110 | — | below 30 or above 110 |
| K/μL | 30 – 110 | — | below 30 or above 110 |
| /mm³ | 30,000 – 110,000 | — | below 30,000 or above 110,000 |
| x E9/L | 30 – 110 | — | below 30 or above 110 |
No separate Sufficient band is currently defined for this marker.
What the evidence says
The band is the adult laboratory reference interval (Mayo Clinic Laboratories: 30.4 to 110.9 ×10⁹/L). It is a reference interval, not an outcome-based target, and it only means something read against the haemoglobin: a count inside the band is an inadequate marrow response when the client is anaemic.
Sources
- Reticulocyte Profile, Blood (Test ID RETB) — Mayo Clinic Laboratories, 2026 · Laboratory / reference-interval sourceAdult absolute reticulocyte reference values are 30.4 to 110.9 ×10⁹/L. This matches Sera's band of 30 to 110.
What Reticulocytes (Absolute) measures
The number of brand-new red blood cells in circulation, counted directly. This is the more reliable of the two reticulocyte measures.
Shows how hard your bone marrow is working to make red blood cells, and it only means something read against your haemoglobin. A normal count alongside a low haemoglobin means the marrow is not responding as it should. A rise 7 to 10 days after starting iron, B12, or folate is expected and is a good sign.
Related blood cell health markers
- RBC # (Red Blood Cell Count)
- Hemoglobin (HGB)
- Hematocrit (HCT)
- Mean Corpuscular Volume (MCV)
- Mean Corpuscular Hemoglobin (MCH)
- Mean Corpuscular Hemoglobin Concentration (MCHC)
- RDW (Red Cell Distribution Width)
- WBC # (White Blood Cell Count)
- Neutrophils #
- Lymphocytes #
- Monocytes #
- Eosinophils #
- Basophils #
- Neutrophils %
- Lymphocytes %
- Monocytes %
- Eosinophils %
- Basophils %
- Immature Granulocytes %
- Platelets (Thrombocytes)
- PCT (Plateletcrit)
- Reticulocytes (%)
- Ferritin
- Iron (Serum)
- Transferrin
- TIBC (Total Iron Binding Capacity)
- Transferrin Saturation
- UIBC (Unsaturated Iron Binding Capacity)