h to s Conversion Calculator
Click on the following link if you want to convert seconds to hours – s to h
History
The concept of dividing the day into 24 hours dates back to ancient Egypt, where people tracked time using sundials and stars.
The system of 60 minutes per hour and 60 seconds per minute was later adopted from the Babylonian base-60 system and has been used ever since.
In modern science, the second became the base unit of time in the International System (SI), while the hour remains a convenient, larger unit for daily life.
Common Usage
- Hours (h) are used to measure working time, travel duration, and events.
- Seconds (s) are used for precision measurements, such as timing races or scientific experiments.
For example, a 3-hour drive lasts 10,800 seconds.
Hours to Seconds Conversion Formula
Each hour contains 3,600 seconds (60 minutes × 60 seconds).
s = h × 3,600
Example:
Convert 4.5 hours to seconds.
4.5 × 3,600 = 16,200 seconds
So, 4.5 hours equals 16,200 seconds.
Conversion Table
| Hours (h) | Seconds (s) |
|---|---|
| 0.5 h | 1,800 s |
| 1 h | 3,600 s |
| 2 h | 7,200 s |
| 3 h | 10,800 s |
| 4 h | 14,400 s |
| 5 h | 18,000 s |
| 6 h | 21,600 s |
| 8 h | 28,800 s |
| 12 h | 43,200 s |
| 24 h | 86,400 s |
Fun Facts
- There are 31,536,000 seconds in a year (365 days).
- The average workday of 8 hours equals 28,800 seconds.
- A 90-minute football match lasts 5,400 seconds.
Frequently Asked Questions
1. How many seconds are in 1 hour?
Exactly 3,600 seconds.
2. How do I convert hours to seconds?
Multiply the number of hours by 3,600.
3. How many seconds are in 2.5 hours?
2.5 × 3,600 = 9,000 seconds.
4. Why does one hour have 60 minutes?
The 60-based system was inherited from ancient Babylonian astronomy.
5. What’s the symbol for seconds?
The lowercase s.
