How long is that, on the scale of everything?

Human intuition for time covers about six orders of magnitude. The universe covers eighteen. Here is the whole range.

The duration Unit

1.36 × a human lifetime

100 yr is longer than 6 of the 11 references on this page.

Reference figures are measurements and are rounded; the unit conversion behind them is exact.

Every reference on this page, with its size and its ratio to your number
Reference	Size	Yours ÷ theirs	Note
heartbeat	2.73×10⁻⁸ yr	3,669,413,023×
pop song	6.65×10⁻⁶ yr	15,027,120×
feature film	0.000228 yr	438,291×
day	0.00274 yr	36,524×
year	1 yr	100×
human lifetime	73.5 yr	1.36×	The global average, 73.4 years
recorded history	5,070 yr	1/50.7	About 5 000 years
since humans appeared	301,043 yr	1/3,010	About 300 000 years
since the dinosaurs died	65,912,576 yr	1/659,126
age of the Earth	4,531,489,606 yr	1/45,314,896
age of the universe	13,784,601,250 yr	1/137,846,013

If the age of the Earth were one year, all of recorded history would be the last 34 seconds.
Humans have existed for about 0.007% of the age of the universe, and written things down for 0.00004% of it.

Frequently asked

13.79 billion years, from the Planck satellite’s measurement of the cosmic microwave background. The uncertainty is about 20 million years.

4.54 billion years, from radiometric dating of meteorites that formed alongside it. The oldest Earth rocks are about 4.0 billion years old.