Time Converter

Convert durations between seconds, minutes, hours, days, weeks, months, and years with clear fixed-duration assumptions.

Convert instantly

Enter a value and choose the units. Your answer updates as you type.

Value

From

Result

0.001 Second (s)

Quick reference

Millisecond (ms)0.001 base units
Second (s)1 base units
Minute (min)60 base units
Hour (h)3600 base units
Day (24 hours)86400 base units
Week (7 days)604800 base units
Month (30 days)2592000 base units

About the Time Converter

Duration conversion is straightforward for seconds, minutes, hours, days, and weeks because those units have fixed definitions. Months and years vary on a calendar, so this tool clearly uses a 30-day month and a 365-day year for arithmetic duration estimates rather than pretending every calendar interval has one length.

Use the instant result for schedules, project estimates, study plans, and science problems—for example, 2.5 hours equals 9,000 seconds. When you need a date-aware calculation, use the existing Date Calculator; for travel rates, combine a duration with the Speed Converter and Length Converter.

Frequently asked questions

How many seconds are in a day?

A standard 24-hour day contains exactly 86,400 seconds.

How long is a month here?

For fixed-duration conversion, this page defines a month as 30 days. Calendar months should be handled with a date-aware tool.

How many weeks are in a year?

Using a 365-day year, the result is approximately 52.142857 weeks; a calendar year is not an exact whole number of weeks.

Take this calculation further

Browse the converters calculators collection for more tools in this subject.

For a related calculation, use Acceleration Converter to convert linear acceleration between meters per second squared, feet per second squared, standard gravity, and centimeters per second squared. Alternatively, use Speed Converter to convert speed between meters per second, kilometers per hour, miles per hour, knots, feet per second, and Mach.

For the underlying method, read Length Conversion Without Guesswork: Metric, Imperial, and Precision.