Seconds to Days/Hours/Minutes Converter

How it is calculated

The seconds are split with whole-number division and remainders. days = ⌊s / 86400⌋, then the remainder is divided by 3600 for hours, the next remainder by 60 for minutes, and what is left is seconds. The result is written with the letters d, h, m and s, for example 1d 3h 46m 40s. A unit is left out only at the front: with no days the string starts at hours, and with no hours either it starts at minutes, but once a larger unit is shown, smaller ones appear even when they are 0 (so 3600 gives 1h 0m 0s). The tool also gives the total as decimal hours (s / 3600) and decimal minutes (s / 60), rounded to two decimals. Whole numbers from 0 up to 10¹⁵ are accepted, and 0 simply shows 0s; negative numbers and values with a fraction such as 90.5 give no result. A day is always 86,400 seconds, so clock changes and leap seconds are not considered.

Common mistakes

• Entering minutes or milliseconds. The field is in seconds; 5 minutes must be typed as 300, and milliseconds must be divided by 1000 first.
• Entering a value with a fraction, such as 90.5. Only whole seconds work, so round before entering.
• Reading the total hours as hours and minutes. 27.78 hours is decimal, not 27 hours 78 minutes; the broken-down line gives the real clock time.
• Reading 1h 0m 0s as a missing value. Zero units are shown on purpose once a larger unit appears.
• Using the result for calendar spans. A day here is exactly 86,400 seconds, so the tool does not know about months, daylight saving or leap years.