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Unit Conversion & Everyday Life

Time Unit Converter

Convert time between seconds, minutes, hours, days, weeks, average months, years, decades and smaller units.

Your inputs

Results

2.5 h in min

150 min

Conversion type
Exact (from defined constants; display rounded to 12 significant figures)
1 h =
60 min

✓Exact calculation — rounded only for display

2.5 h in all time units14 rows
UnitValue
Nanosecond (ns)9,000,000,000,000
Microsecond (µs)9,000,000,000
Millisecond (ms)9,000,000
Second (s)9,000
Minute (min)150
Hour (h)2.5
Day (d)0.1041666667
Week (wk)0.0148809524
Fortnight (fn)0.0074404762
Month (average Gregorian) (mo)0.0034223838
Year (average Gregorian) (yr)0.0002851986
Julian year (a)0.0002851928
Decade (Gregorian) (dec)0.0000285199
Century (Gregorian) (c.)0.000002852

What this calculator does

Convert durations at any scale, from nanoseconds to centuries.

Formula and method

1 min = 60 s, 1 h = 3600 s, 1 day = 86,400 s; average Gregorian year = 365.2425 days; Julian year = 365.25 days.

Worked example

Calculated by this tool with its default inputs:

Inputs

  • Value: 2.5
  • From: Hour (h)
  • To: Minute (min)

Results

  • 2.5 h in min: 150 min
  • Conversion type: Exact (from defined constants; display rounded to 12 significant figures)
  • 1 h =: 60 min

How to read the results

Months and years are averages — calendar months vary from 28 to 31 days.

Assumptions and limitations

  • Leap seconds are ignored.
  • Constants follow NIST SP 811 and the SI Brochure. Conversions marked exact follow from defined values; display is rounded to 12 significant figures.

Questions

How many seconds in a year?

About 31,556,952 for an average Gregorian year.

Sources

Methodology and verification

Result type
Exact mathematical calculation (rounded only for display)
Formula version
1.0
Automated verification
8 reference and validation test cases, checked against independently computed values. The site cannot be built if any of them fail.
Editorial review
Awaiting human editorial review. The explanation was drafted with AI assistance; the formula and examples are verified by the automated tests above.

Privacy

Everything you enter is calculated in this browser and is not sent to Numerith or anyone else. Inputs are added to a share link only if you choose to include them. Privacy policy