How many hours in a year?

1 year (365.25 days) = 8,766 hours = 525,960 minutes = 31,557,600 seconds.

How many days in a month?

This calculator uses an average month of 30.4375 days (365.25 ÷ 12). Calendar months range from 28 to 31 days.

How many weeks in a year?

1 year = 52 weeks + 1 day (365 days ÷ 7 = 52.14 weeks). A leap year has 52 weeks + 2 days.

What is a millisecond vs a microsecond?

1 millisecond (ms) = 1/1,000 of a second. 1 microsecond (μs) = 1/1,000,000 of a second. 1 nanosecond (ns) = 1/1,000,000,000 of a second. Computer processors typically operate on nanosecond timescales.

Hometime converter

Time Converter

Convert between nanoseconds, seconds, minutes, hours, days, weeks, months, and years.

ValueFrom

Unit	Value
Nanosecond (ns)	3.6000e+12
Microsecond (μs)	3600000000
Millisecond (ms)	3600000
Second (s)	3600
Minute (min)	60
Hour (hr)	1
Day	0.041666667
Week	0.005952381
Month (avg)	0.0013689254
Year (365.25 d)	0.00011407712
Decade	1.1408e-5

Quick time conversion facts

1 minute=60 seconds

1 hour=3,600 seconds

1 day=86,400 seconds

1 week=168 hours

1 year=8,766 hours

1 decade=10 years / 3,652 days

Understanding time units

Nanosecond / microsecond / millisecond — Used in computing, networking, and scientific measurement. A CPU running at 3 GHz performs about 3 billion operations per second (one every ~0.33 ns).
Second / minute / hour — Everyday time units for scheduling, cooking, travel, and clocks.
Day / week — Based on Earth's rotation (day) and the biblical/cultural 7-day week.
Month (average) — This converter uses 30.4375 days (365.25 ÷ 12), accounting for the average across all months including leap years.
Year — Uses 365.25 days to account for leap years. The exact tropical year (solar year) is 365.2422 days.

Frequently Asked Questions

1 day = 24 hours × 60 minutes × 60 seconds = 86,400 seconds.