Blink of an eye
A blink of an eye is the quick closing and opening of the eyelid, usually happening involuntarily.
How big is it?
150 ms
Time · reference interval
A little perspective
Heartbeat is about 6.67 times larger on this measurement.
Heartbeat: A heartbeat is the regular contraction of the heart that pumps blood through the body.
Measurements, assumptions & sources +
Blink of an eye
A chosen 150 ms interval, not a universal blink duration.
Defined examples — our methodology
The marked time is calibrated. Unmeasured illustration details are representative.
Heartbeat
One beat per second corresponds to 60 beats per minute; this is a timing example.
Defined examples — our methodology
The marked time is calibrated. Unmeasured illustration details are representative.
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Why this measurement?
Why we use 150 ms
For comparison, this page uses time. This is labelled reference interval: an explicit comparison model rather than a claim that every example has the same value.
A chosen 150 ms interval, not a universal blink duration.
The identifying illustration and the numerical comparison remain separate. How calibrated comparisons work →
Recorded properties
Blink of an eye dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 150 ms | Not recorded | reference interval |
Around this scale
Go smaller. Go bigger.
These links use compatible time records, ordered around the selected value.
Nearest lower value · TimeCinema frame at 24 frames per second41.67 msA cinema frame at 24 frames per second is the time interval between consecutive images in standard film projection.
Nearest higher value · TimeHeartbeat1 sA heartbeat is the regular contraction of the heart that pumps blood through the body.Sources and method
Want to check the number?
The source records and measurement method remain available for inspection.
More ways to see it
Curated comparisons
There’s always another scale
Follow your curiosity.
TimeHuman lifetime80 yearsA human lifetime is the span from a person's birth to their death.
TimeAge of Earth4.54 GyrThe age of Earth is the time that has passed since the planet formed from the solar nebula.TimeAge of the universe13.8 GyrThe age of the universe is the time since the Big Bang, marking the beginning of cosmic expansion.TimeHeartbeat1 sA heartbeat is the regular contraction of the heart that pumps blood through the body.TimeCinema frame at 24 frames per second41.67 msA cinema frame at 24 frames per second is the time interval between consecutive images in standard film projection.TimeCamera flash1 msA camera flash is a brief, intense burst of light used to illuminate a scene for photography.
GravityParabolic-flight microgravity arc0.02 NA parabolic-flight microgravity arc is a flight manoeuvre that creates short periods of near-weightlessness for people and experiments inside an aircraft.GravityTen-metre centrifuge at two rpm0.4387 NA ten-metre centrifuge at two rpm is a rotating device used to simulate artificial gravity by spinning samples at a controlled speed.