Second to Days and Hours Converter (and vice versa)

Created by: tinycalcs.com/en
Number of supported units: 2
Last update: 2026

This converter allows you to convert seconds [s] to days & hours or days & hours to seconds [s]. Calculations are performed in both directions. The calculation result and the entered value are displayed with up to 20 decimal places for maximum accuracy.

Converting decimal seconds to days and hours

The conversion of decimal seconds to days [d] and hours [h] is best explained with an example. 108,000 decimal seconds are used as the starting point for the calculation example. First, this value is divided by 86,400 to calculate the number of decimal days. The result of this calculation is 1.25 decimal days. The number to the left of the decimal point is the integer part, which in this example is 1. This number can be taken unchanged and corresponds to the final result of 1 day. The number to the right of the decimal point must still be converted into hours [h] by multiplying it by 24. 0.25 * 24 equals 6 hours [h]. In total, 108,000 decimal seconds thus correspond to 1 day and 6 hours [h].


Converting days and hours to decimal seconds

To convert days [d] and hours [h] to decimal seconds, multiply the days [d] by 24 and add them to the hours [h]. The result of this calculation must then be multiplied by 3,600.

  • Decimal seconds = (days [d] * 24 + hours [h]) * 3,600