How many seconds are in one hour?

One hour equals 3,600 s. The formula is s = h × 3,600.

How do I convert hours to seconds?

Multiply the value in hours by 3,600. For example, 100 × 3,600 = 360,000 — so 100 h = 360,000 s.

Pair · linear · factor 3,600

hours to seconds

Active unit

hours · ≈ 360,000 s (base)

All units

8 results

Click to activate · Ctrl-click to set target

hhour100

How we calculated this

Target:

Frequently asked questions

A glowing emerald clock face dissolving into Babylonian cuneiform marks and a zodiac ring, against a cosmic nebula in violet and magenta

Time

Why does an hour have 60 minutes, not 100? The legacy of Babylon

The whole world counts in tens — except on the clock. An hour splits into 60 minutes, a minute into 60 seconds, a circle into 360 degrees, because four thousand years ago the Sumerians counted on the joints of their fingers. Here is why the Babylonian order outlived revolutions, empires, and the digital age.

11 min