Red-cell lifespan
Red-cell lifespan is the average time a human red blood cell remains in circulation before being removed from the bloodstream.
Also known as: red blood cell lifespan, erythrocyte lifespan
How big is it?
120 days
Typical circulating lifespan · representative
Typical recorded range: 100 days to 130 days.
A little perspective
About the same scale as Venus solar day.
Venus solar day: A Venus solar day is the interval between two successive sunrises at the same location on Venus, which is much longer than an Earth day.
Measurements, assumptions & sources +
Red-cell lifespan
A typical human red blood cell circulates for about 120 days, or 10.368 million seconds, before removal. Lifespan varies with cell condition and health; this is not a transit time.
NCBI Bookshelf — Red blood cell physiology
The marked typical circulating lifespan is calibrated. Unmeasured illustration details are representative.
Venus solar day
One Venus solar day lasts about 116.75 Earth days, approximately 10.09 million seconds. This differs from Venus’s longer retrograde sidereal rotation period.
The marked solar day is calibrated. Unmeasured illustration details are representative.
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Why this measurement?
Why we use 120 days
For comparison, this page uses typical circulating lifespan. This is labelled representative; the central value is useful for comparison, while real values or measurement solutions can vary. The recorded range is 100 days to 130 days.
A typical human red blood cell circulates for about 120 days, or 10.368 million seconds, before removal. Lifespan varies with cell condition and health; this is not a transit time.
The identifying illustration and the numerical comparison remain separate. How calibrated comparisons work →
Recorded properties
Red-cell lifespan dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 120 days | 100 days to 130 days | representative |
Around this scale
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These links use compatible time records, ordered around the selected value.
Nearest lower value · TimeVenus solar day116.8 daysA Venus solar day is the interval between two successive sunrises at the same location on Venus, which is much longer than an Earth day.
Nearest higher value · TimeHuman lifetime80 yearsA human lifetime is the span from a person's birth to their death.Sources and method
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The source records and measurement method remain available for inspection.
- NCBI Bookshelf — Red blood cell physiologyHuman erythrocyte circulation and approximately 120-day lifespan; circulation time varies with physiology.
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.TimeVenus solar day116.8 daysA Venus solar day is the interval between two successive sunrises at the same location on Venus, which is much longer than an Earth day.TimeMoon phase synodic cycle29.53 daysThe Moon phase synodic cycle is the average time between identical lunar phases, such as from one full moon to the next.TimeHuman lifetime80 yearsA human lifetime is the span from a person's birth to their death.TimeA century100 yearsA century is a period of one hundred years.TimeA workday8 hA workday is a typical period during which people perform paid employment.TimeGeostationary satellite orbit23.93 hA geostationary satellite orbit is a circular path above Earth's equator where a satellite moves at the same rate as Earth's rotation, appearing stationary over one longitude.