Monocyte percentage 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 Monocyte percentage:

  • Optimal 3 – 7 %; sufficient 2 – 8 %; out of range below 2 or above 8 %.

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

UnitOptimalSufficientOut of range
%3 – 72 – 8below 2 or above 8

What the evidence says

The acceptable band of 2% to 8% is the reference interval MedlinePlus gives. Laboratories differ widely here, and some print an interval as high as 5% to 15%, so the laboratory's own range should be checked before a result just above 8% is treated as raised. The optimal band of 3% to 7% has no published source. The absolute monocyte count is the more meaningful figure, since a percentage shifts whenever another cell type changes.

Sources

  • Blood differential test — MedlinePlus Medical Encyclopedia, US National Library of Medicine, 2025 · Government / public-health guidanceNormal monocytes are 2% to 8% of white cells, the same as Sera's sufficient band.
  • AUTO DIFF (test catalog entry) — MHCC Laboratory, test catalog powered by Mayo Clinic Laboratories, 2026 · Laboratory / reference-interval sourceAdult monocytes 5% to 15%, a higher interval than Sera's 2% to 8%. The page shows no review date; 2026 is the copyright year.

What Monocytes % measures

The share of your white blood cells that are monocytes.

Raised in long-term infections and inflammatory conditions.

Related blood cell health markers

See Monocyte percentage in the full list of biomarker ranges

About the author

Alina Radu is the founder of Sera and a software engineer. The idea started with her own Hashimoto's tests, scattered across years without the big picture. She is not a clinician: these ranges are compiled from the published sources linked on each page, with every source named. Alina Radu on LinkedIn

This page is a reference for practitioners, not medical advice. Sera's bands are practitioner targets for structured review, not diagnostic thresholds, and Sera does not diagnose or recommend treatment. Read a result alongside the interval printed by the issuing laboratory and the client's history and symptoms. Range set: Sera Production, version 1.0, last reviewed November 9, 2026.