Plateletcrit 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 Plateletcrit:

Optimal 0.15 – 0.35 % (0.002 – 0.004 L/L); sufficient 0.1 – 0.4 % (0.001 – 0.004 L/L); out of range below 0.1 or above 0.4 %.

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
%	0.15 – 0.35	0.1 – 0.4	below 0.1 or above 0.4
L/L	0.002 – 0.004	0.001 – 0.004	below 0.001 or above 0.004

What the evidence says

The product of count and mean volume, so it captures total platelet mass rather than number. Most useful when count and MPV move in opposite directions and it is not obvious what happened to the total. Not procalcitonin, which shares the abbreviation and is a different test entirely. The optimal band is close to a UK reference interval measured on a Sysmex analyser (0.16 to 0.35% in men, 0.18 to 0.37% in women). The wider acceptable band has no published source, and because plateletcrit depends on the analyser's MPV, the reporting laboratory's interval takes precedence.

Sources

Sex-divided reference intervals for mean platelet volume, platelet large cell ratio and plateletcrit using the Sysmex XN-10 automated haematology analyzer in a UK population — Ali U, Gibbs R, Knight G, Tsitsikas D — Hematology, Transfusion and Cell Therapy, 2019 · Peer-reviewed publicationUK reference intervals on a Sysmex XN-10: plateletcrit 0.16 to 0.35% in men and 0.18 to 0.37% in women. Close to Sera's optimal band of 0.15 to 0.35%.

What PCT (Plateletcrit) measures

The fraction of blood volume occupied by platelets — the platelet equivalent of the haematocrit.

The product of platelet count and mean volume, so it captures total platelet mass where the count alone captures only number. Rarely acted on by itself; useful when count and MPV move in opposite directions and it is not obvious which way total platelet mass has gone. Not to be confused with procalcitonin, which shares the abbreviation.

Related blood cell health markers

See Plateletcrit in the full list of biomarker ranges

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.