Days To Hours Conversion (day To Hr) - Inch Calculator

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• Days to Hours Converter
• How to Convert Days to Hours
• How Many Hours Are in a Day?
• What Is a Day?
• What Is an Hour?
• Day to Hour Conversion Table

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Joe is the creator of Inch Calculator and has over 20 years of experience in engineering and construction. He holds several degrees and certifications.

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Ethan has a PhD in astrophysics and is currently a satellite imaging scientist. He specializes in math, science, and astrophysics.

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Sexton, J. (n.d.). Days to Hours Converter. Inch Calculator. Retrieved January 8, 2026, from https://www.inchcalculator.com/convert/day-to-hour/

How to Convert Days to Hours

To convert a measurement in days to a measurement in hours, multiply the time by the following conversion ratio: 24 hours/day.

Since one day is equal to 24 hours, you can use this simple formula to convert:

hours = days × 24

The time in hours is equal to the time in days multiplied by 24.

For example, here's how to convert 5 days to hours using the formula above.

hours = (5 d × 24) = 120 hr

How Many Hours Are in a Day?

There are 24 hours in a day, which is why we use this value in the formula above.

1 d = 24 hr

You can use our hours calculator to figure how many hours you work in a day.

Days and hours are both units used to measure time. Keep reading to learn more about each unit of measure.

What Is a Day?

One day is the time it takes for the Earth to complete a single 360-degree rotation about its axis. There are 24 hours in a day.

The day is an SI accepted unit for time for use with the metric system. Days can be abbreviated as d; for example, 1 day can be written as 1 d.

Learn more about days.

What Is an Hour?

The hour is a period of time equal to 1/24 of a day or 60 minutes.

The hour is an SI accepted unit for time for use with the metric system. Hours can be abbreviated as hr (plural hrs); for example, 1 hour can be written as 1 hr, and 2 hours can be written as 2 hrs.

Learn more about hours.

Day to Hour Conversion Table

Table showing various day measurements converted to hours.

Days	Hours
1 d	24 hr
2 d	48 hr
3 d	72 hr
4 d	96 hr
5 d	120 hr
6 d	144 hr
7 d	168 hr
8 d	192 hr
9 d	216 hr
10 d	240 hr
11 d	264 hr
12 d	288 hr
13 d	312 hr
14 d	336 hr
15 d	360 hr
16 d	384 hr
17 d	408 hr
18 d	432 hr
19 d	456 hr
20 d	480 hr
21 d	504 hr
22 d	528 hr
23 d	552 hr
24 d	576 hr
25 d	600 hr
26 d	624 hr
27 d	648 hr
28 d	672 hr
29 d	696 hr
30 d	720 hr
31 d	744 hr
32 d	768 hr
33 d	792 hr
34 d	816 hr
35 d	840 hr
36 d	864 hr
37 d	888 hr
38 d	912 hr
39 d	936 hr
40 d	960 hr

More Day & Hour Conversions

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Clock IconConvert to Hours

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