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Time Converter

56 conversions available

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

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Seconds → Milliseconds Seconds → Minutes Seconds → Hours Seconds → Days Seconds → Weeks Seconds → Months Seconds → Years Milliseconds → Seconds Milliseconds → Minutes Milliseconds → Hours Milliseconds → Days Milliseconds → Weeks Milliseconds → Months Milliseconds → Years Minutes → Seconds Minutes → Milliseconds Minutes → Hours Minutes → Days Minutes → Weeks Minutes → Months Minutes → Years Hours → Seconds Hours → Milliseconds Hours → Minutes Hours → Days Hours → Weeks Hours → Months Hours → Years Days → Seconds Days → Milliseconds Days → Minutes Days → Hours Days → Weeks Days → Months Days → Years Weeks → Seconds Weeks → Milliseconds Weeks → Minutes Weeks → Hours Weeks → Days Weeks → Months Weeks → Years Months → Seconds Months → Milliseconds Months → Minutes Months → Hours Months → Days Months → Weeks Months → Years Years → Seconds Years → Milliseconds Years → Minutes Years → Hours Years → Days Years → Weeks Years → Months

Most popular time conversions

The most searched time conversions are hours to minutes, days to hours, and seconds to minutes. There are 60 seconds in a minute, 60 minutes in an hour, 24 hours in a day, and 168 hours in a week. Converting across large spans is where chaining these factors matters.

Understanding time units

Time is unique because it isn't decimal: 60 seconds per minute, 60 minutes per hour, 24 hours per day. Converting between distant units like seconds and days requires chaining several factors, which this converter handles automatically.

Quick reference

1 minute = 60 s · 1 hour = 3,600 s · 1 day = 86,400 s · 1 week = 604,800 s · 1 year ≈ 365.25 days. Use the converter for any exact value.

Quick reference: time unit equivalences

1 minute	60 seconds
1 hour	3,600 seconds
1 day	86,400 seconds
1 week	604,800 seconds
1 year	365.25 days (8,766 h)
1 millisecond	0.001 s
1 microsecond	10⁻⁶ s
1 fortnight	14 days

Frequently asked questions

Why is a year 365.25 days for calculations?

Earth's orbit takes about 365.2422 days. The Julian average of 365.25 is why we add a leap day every four years, with century corrections in the Gregorian calendar.

How many seconds are in a day?

86,400 — that is 24 hours × 60 minutes × 60 seconds. A week is 604,800 seconds.

What uses milliseconds and microseconds?

Human reaction time is ~200–300 ms; screen refresh frames at 60 Hz last 16.7 ms; computer operations and network latency are measured in micro- and milliseconds.