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Convert between time units instantly. Our free online time converter supports seconds, minutes, hours, days, weeks, months, and years with precise, real-time results.

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Time Converter

Free Time Converter, Convert Seconds, Minutes, Hours, Days, Weeks & Milliseconds Instantly

Convert time durations between any units instantly with OmniConverter's free time converter. 1 hour equals 3,600 seconds, 1 day equals 24 hours, and 1 week equals 7 days. Supports seconds, minutes, hours, days, weeks, months, years, and milliseconds. Whether you need to convert project timelines or calculate how many seconds are in a year (31,536,000), our tool delivers fast, accurate results.

How It Works

Convert in three simple steps.

1

Enter the Time Duration

2

Select Your Source and Target Time Units

3

Receive Your Converted Time Duration

Popular Time Conversions

Hours to MinutesMinutes to HoursDays to HoursHours to DaysMinutes to SecondsSeconds to MinutesDays to WeeksWeeks to DaysMonths to WeeksWeeks to MonthsYears to MonthsMonths to YearsYears to DaysDays to YearsMilliseconds to SecondsSeconds to MillisecondsHours to SecondsSeconds to HoursYears to HoursHours to YearsWeeks to HoursHours to WeeksMonths to DaysDays to Months

Common Benchmarks

Reference

1 s → s

1 s

Reference

1 s → ms

1000 ms

Reference

1 s → min

0.0166666667 min

Reference

1 s → h

0.0002777778 h

Reference

1 s → d

0.0000115741 d

Reference

1 s → wk

0.0000016534 wk

Reference

1 s → mo

3.802571e-7 mo

Reference

1 s → yr

3.168809e-8 yr

Real-World Use Cases

Time duration conversion is used in project management (converting sprint lengths or deadlines), software development (calculating timeouts, latency, and expiry in different units), academic research (converting experimental durations), fitness (converting workout durations between minutes and hours), astronomy (planetary periods in days vs years), and finance (converting loan terms and interest periods).

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Frequently asked questions

Quick answers to common conversion questions

How do I convert hours to minutes?+

Multiply hours by 60 to get minutes.

What is the relation between days and weeks?+

One week is 7 days, so divide by 7 to convert days to weeks.

How many seconds are in a day?+

There are 86,400 seconds in one day.

Can I convert months to days?+

Yes, the converter uses a standard average month length for approximate conversions.

What is a leap year?+

A leap year has 366 days instead of 365 to keep the calendar aligned with Earth’s orbit.

How do I convert milliseconds to seconds?+

Divide milliseconds by 1,000 to get seconds.

Is one year always 365 days?+

A civil year usually has 365 days, while leap years add one extra day.

How do I convert years to months?+

Multiply years by 12 for a simple calendar approximation.

What are common time units in science?+

Seconds, milliseconds, microseconds, and nanoseconds are common in technical work.

Can I convert between UTC and local time?+

Yes, use the timezone converter for that kind of scheduling and offset comparison.

Latest Blog Posts

Tips, guides, and insights about unit conversions

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Quick Answer: Time Converter

Convert time instantly — enter any value and get all units at once. Common time conversions include hours to minutes (1 hr = 60 min), days to hours (1 day = 24 hr), and weeks to days (1 wk = 7 days). Time conversion is essential for project planning, scheduling, travel, sports timing, and scientific calculations.

How the Time Converter Works

Our time converter converts between seconds, minutes, hours, days, weeks, months, and years using standard time conversion factors. Results are calculated instantly.

Formula & Sources

SI second defined by cesium-133 (BIPM). Calendar conversions use Gregorian mean year 365.2425 days.

Worked Example

Example: 3 days to hours — 3 × 24 = 72 h. 90 minutes = 1.5 hours = 5400 seconds.

Common Time Conversions

Common time conversions include hours to minutes (1 hr = 60 min), days to hours (1 day = 24 hr), and weeks to days (1 wk = 7 days).

When to Use Time Conversion

Time conversion is essential for project planning, scheduling, travel, sports timing, and scientific calculations.

Accuracy & Common Mistakes

All factors are stored unrounded and computed in double precision. We avoid cumulative rounding by converting via a base unit. Always verify critical results with a second source for safety-critical tasks.

Frequently Asked Questions

How many seconds in a day?

86,400 seconds (24 × 60 × 60). Excluding leap seconds.

How many days in a year?

365 days common, 365.2425 mean Gregorian year. Use for long-range planning.

How many weeks in a year?

52 weeks + 1 day (common) or +2 in leap year.

Popular Time comparisons

Jump directly to a side-by-side comparison — no typing needed. Also discoverable via search.

Second → Millisecond→Second → Minute→Second → Hour→Second → Day→Millisecond → Minute→Millisecond → Hour→
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