Moments to Hours (moment to h)

1 moment equals 0.025 hours exactly.

1 moment = 0.025 hours

How to convert moments to hours

To convert moments to hours, multiply the number of moments by 0.025. This factor is exact. To go the other way, multiply hours by 40.

hours = moments × 0.025

Example: 10 moments = 0.25 hours.

Months and years are not constant. This site uses the average Gregorian year of 365.2425 days, so one 'year' converts to 365.2425 days, not 365; use 'common year' for exactly 365 days.

Approximate value. Standards for the moment varied by place and period, so this converter uses the most commonly cited value. Treat results as estimates, not exact figures.

About these units

Moment (moment)

Medieval EnglishHistorical unit (no longer in standard use)Approximate value

About ninety seconds, one fortieth of a solar hour. A medieval unit of time described by the English monk Bede.

Medieval computists, the scholars who worked out the calendar and the date of Easter, used the moment as a small slice of the hour. The Venerable Bede described it in the 8th century. It was one fortieth of a solar hour, measured by the motion of a sundial shadow, and since the solar hour varied with the season, the moment was not fixed.

On average a moment equalled about 90 seconds, which is the figure used here. Bede's scheme also had the punctum at four per hour, the minutum at ten and the pars at fifteen, so a day held 960 moments. Bartholomeus Anglicus and Roger Bacon later wrote about the system, and Bacon subdivided the moment into 12 ounces of 47 atoms each. The modern phrase a moment is much looser, and the ostent that Bacon mentioned is seen as a forerunner of the modern minute.

1 moment = 90 seconds (approximately).

Sources: Wikipedia: Moment (time)

Hour (h)

Metric (SI)Current unit

60 minutes or 3,600 seconds, one twenty-fourth of a mean solar day.

Egyptian astronomers gave us the twelve. Coffin lids from about 2150 BC show the night divided into exactly 12 intervals, tied to the rising of star groups called decans, and the day was later split into 12 hours with sundials. These were seasonal hours, a twelfth of the daylight, so a summer hour was longer than a winter one. The word itself comes from Greek hora, originally any span of time, through Latin and Old French into English in the 13th century.

Equal hours of 1/24 of a day were probably first proposed by Hipparchus, and mechanical clocks made them the practical choice, since a clock showing seasonal hours had to be readjusted every morning and evening. Today the hour is exactly 3,600 seconds and is a non-SI unit accepted for use with the SI. Civil time still bends it a little: UTC hours have lasted 3,601 seconds 27 times since 1972 to keep clocks within 0.9 seconds of the Earth's rotation. In practice we use it for working shifts, travel times and electricity bills measured in kilowatt-hours.

1 hour = 3,600 seconds (exactly).

Sources: Wikipedia: Hour; BIPM: SI Brochure, 9th edition

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