Sperm cell
A sperm cell is a male reproductive cell with a compact head, energy-producing midpiece and a flagellum used for movement.
Also known as: human spermatozoon, spermatozoon
How big is it?
50 µm long
Also 0.001969 in
Representative head-to-tail length · representative
Typical recorded range: 45 µm to 60 µm.
A little perspective
About 1.67 times the characteristic size of Pollen grain.
Pollen grain: A pollen grain carries the male reproductive cells of a seed-producing plant.
Measurements, assumptions & sources +
Sperm cell
A representative human sperm cell 50 µm from head to tail tip. Preparation, motility and individual morphology vary; the scientific diagram is schematic and does not imply a rigid outline.
NCBI Bookshelf — Sperm transport and capacitation
The marked representative head-to-tail length is calibrated. Unmeasured illustration details are representative.
Pollen grain
A chosen 30 µm pollen grain. Plant species produce very different grains.
University of Utah — Cell size and scale
The marked characteristic size is calibrated. Unmeasured illustration details are representative.
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Why this measurement?
Why we use 50 µm
For comparison, this page uses representative head-to-tail length. This is labelled representative; the central value is useful for comparison, while real values or measurement solutions can vary. The recorded range is 45 µm to 60 µm.
A representative human sperm cell 50 µm from head to tail tip. Preparation, motility and individual morphology vary; the scientific diagram is schematic and does not imply a rigid outline.
The marked horizontal span follows the named feature; transparent margins and unmeasured details do not alter it. How calibrated comparisons work →
Recorded properties
Sperm cell dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 50 µm | 45 µm to 60 µm | representative |
Around this scale
Go smaller. Go bigger.
These links use compatible length records, ordered around the selected value.
Nearest lower value · MicroscopicPollen grain30 µmA pollen grain carries the male reproductive cells of a seed-producing plant.
Around the same scale · Everyday thingsSheet of paper100 µmA sheet of paper is a flat material made from cellulose pulp, used for writing, printing or packaging.
Nearest higher value · People70 µm hair70 µmA hair is a slender strand of protein that grows from the skin of humans and other mammals.Sources and method
Want to check the number?
The source records and measurement method remain available for inspection.
- NCBI Bookshelf — Sperm transport and capacitationHuman sperm-cell anatomy and characteristic head-to-tail scale.
There’s always another scale
Follow your curiosity.
MicroscopicRed blood cell7.5 µmA red blood cell is a specialised blood cell that transports oxygen using haemoglobin.
PeopleRed-cell circulation time1 minRed-cell circulation time is the typical duration for a red blood cell to complete a full circuit through the human circulatory system at rest.MicroscopicPollen grain30 µmA pollen grain carries the male reproductive cells of a seed-producing plant.People70 µm hair70 µmA hair is a slender strand of protein that grows from the skin of humans and other mammals.Everyday thingsSheet of paper100 µmA sheet of paper is a flat material made from cellulose pulp, used for writing, printing or packaging.
MicroscopicDust particle10 µmDust is a mixture of tiny solid particles from sources such as soil, fibres, skin and pollen.
MicroscopicSalt crystal300 µmA salt crystal is a small, naturally occurring or manufactured piece of sodium chloride used in food and industry.
Microscopic10 µm cell10 µmA cell is the basic structural unit of living organisms.