moment.duration(Number, String); moment.duration(Number); moment.duration(Object); moment.duration(String);

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To create a duration, call moment.duration() with the length of time in milliseconds.

moment.duration(100); // 100 milliseconds

If you want to create a moment with a unit of measurement other than milliseconds, you can pass the unit of measurement as well.

moment.duration(2, 'seconds');
moment.duration(2, 'minutes');
moment.duration(2, 'hours');
moment.duration(2, 'days');
moment.duration(2, 'weeks');
moment.duration(2, 'months');
moment.duration(2, 'years');

The same shorthand for moment#add and moment#subtract works here as well.

Key	Shorthand
years	y
months	M
weeks	w
days	d
hours	h
minutes	m
seconds	s
milliseconds	ms

Much like moment#add, you can pass an object of values if you need multiple different units of measurement.

moment.duration({
    seconds: 2,
    minutes: 2,
    hours: 2,
    days: 2,
    weeks: 2,
    months: 2,
    years: 2
});

As of 2.1.0, moment supports parsing ASP.NET style time spans. The following formats are supported.

The format is an hour, minute, second string separated by colons like 23:59:59. The number of days can be prefixed with a dot separator like so 7.23:59:59. Partial seconds are supported as well 23:59:59.999.

moment.duration('23:59:59');
moment.duration('23:59:59.999');
moment.duration('7.23:59:59.999');
moment.duration('23:59');          //added in 2.3.0

As of 2.3.0, moment also supports parsing ISO 8601 durations.

moment.duration('P1Y2M3DT4H5M6S');
moment.duration('P1M');

As of 2.10.7, duration format strings with a space between days and rest is supported.

moment.duration('7 23:59:59.999');

As of 2.13.0, mixed negative and positive signs are supported when parsing durations.

moment.duration('PT-6H3M')