Convert Hour to Second (hr to sec)

In next fields, kindly type your value in the text box under title [ From: ] to convert from hour to second (hr to sec). As you type your value, the answer will be automatically calculated and displayed in the text box under title [ To: ].


Hour (abbreviations: hr, or h): is a unit of time, conventionally counted as 1/24 of a day. In the modern metric system, it is equivalent to 3,600 seconds.

Second (abbreviations: sec, or s, or s (SI), or sec (US)): is the base unit of time in the International System of Units (SI, Système International d'Unités). It is the second division of the hour by sixty, where the first division by sixty being the minute.

How to Convert Hours to Seconds

Example: How many seconds are equivalent to 99.31 hours?


1 hours = 3600 seconds

99.31 hours = Y seconds

Assuming Y is the answer, and by criss-cross principle;

Y equals 99.31 times 3600 over 1

(i.e.) Y = 99.31 * 3600 / 1 = 357516 seconds

Answer is: 357516 seconds are equivalent to 99.31 hours.

Practice Question: Convert the following units into sec:

N.B.: After working out the answer to each of the next questions, click adjacent button to see the correct answer.

( i ) 34.64 hr

( ii ) 95.3 hr

( iii ) 91.18 hr

Convert Hour to More Time Units

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