Hour to Second Converter (hr to s)

Use the converter above for an immediate result — it recalculates on every keystroke and works offline once the page has loaded.

Quick answer: one hour equals 3,600 seconds. So to convert hours to seconds, multiply by 3,600.

How to convert hours to seconds

seconds = hours × 3,600

The hour (3,600 seconds) divides the day into 24 parts, a convention inherited from ancient Egyptian astronomy.

The second is the SI base unit of time, defined by 9,192,631,770 oscillations of a cesium atom — the tick behind every clock on Earth.

Hour to Second conversion table

Hour (hr)	Second (s)
0.01 hr	36 s
0.1 hr	360 s
0.25 hr	900 s
0.4 hr	1,440 s
0.75 hr	2,700 s
1.25 hr	4,500 s
1.75 hr	6,300 s
2.5 hr	9,000 s
3.5 hr	12,600 s
4.5 hr	16,200 s
6 hr	21,600 s
8 hr	28,800 s
10 hr	36,000 s
12 hr	43,200 s
14 hr	50,400 s
16 hr	57,600 s
18 hr	64,800 s
20 hr	72,000 s
24 hr	86,400 s
26 hr	93,600 s
30 hr	108,000 s
35 hr	126,000 s
45 hr	162,000 s
55 hr	198,000 s
65 hr	234,000 s
75 hr	270,000 s
85 hr	306,000 s
95 hr	342,000 s
110 hr	396,000 s
125 hr	450,000 s
175 hr	630,000 s
250 hr	900,000 s
350 hr	1,260,000 s
450 hr	1,620,000 s
600 hr	2,160,000 s
750 hr	2,700,000 s
900 hr	3,240,000 s
1,500 hr	5,400,000 s
2,500 hr	9,000,000 s
10,000 hr	36,000,000 s

Need the opposite direction? Use the Second to Hour converter, or read our complete guide to time conversions for every formula in one place.

Frequently asked questions

How many seconds are in one hour?

One hour equals 3,600 seconds. Multiply any hour value by 3,600 to get seconds.

What is 10 hours in seconds?

10 hours equal 36,000 seconds (10 × 3,600).

Is the hour to second conversion exact?

The conversion factor used here (3,600) is based on the internationally agreed definitions of both units, so results are exact up to rounding of the final decimal places.

Is my data stored when I use this converter?

No. The conversion runs entirely in your browser with JavaScript — nothing you type is sent to a server, logged or stored.