Time converter
Hours to Days
Hours and Days measure the same quantity in different unit systems. The relationship is 1 hr = 0.04166667 d, which gives 0.04166667 d per hr. Below you can convert any value, check a worked example and read the full chart.
Formula 1 hr = 0.04166667 d
Need the other direction? Days to Hours.
How to convert Hours to Days
An hour is 60 minutes, or 3,600 seconds. A day is 24 hours, or 86,400 seconds, ignoring leap seconds.
To convert Hours to Days, multiply the value in hr by 0.04166667. For example, 10 hr × 0.04166667 = 0.41666667 d. This works because the ratio between the two units is constant for every value in time.
Worked examples
| hr | d |
|---|---|
| 1 hr | 0.04166667 d |
| 2.5 hr | 0.10416667 d |
| 5 hr | 0.20833333 d |
| 10 hr | 0.41666667 d |
| 25 hr | 1.041667 d |
| 50 hr | 2.083333 d |
| 100 hr | 4.166667 d |
Reverse conversion
| d | hr |
|---|---|
| 1 d | 24 hr |
| 5 d | 120 hr |
| 10 d | 240 hr |
| 25 d | 600 hr |
| 50 d | 1,200 hr |
| 100 d | 2,400 hr |
When this conversion is useful
This is the calculation you need when you are planning a project, a sprint or a schedule and need consistent units. Because the factor is fixed, you can use the same number for a single measurement or for a batch: 1,000 hr is 41.666667 d.
Is the conversion exact?
Seconds, minutes, hours, days and weeks are exact. Months and years here use average Julian values (30.4375 days and 365.25 days), so a calendar conversion can differ slightly.
Reference: BIPM SI Brochure and NIST SP 811. Last reviewed: 2026-11-01.
hr to d conversion chart
The chart lists the most requested values. For a value that is not here, use the converter at the top of the page.
| Hours (hr) | Days (d) |
|---|---|
| 1 hr | 0.04166667 d |
| 2 hr | 0.08333333 d |
| 3 hr | 0.125 d |
| 4 hr | 0.16666667 d |
| 5 hr | 0.20833333 d |
| 6 hr | 0.25 d |
| 7 hr | 0.29166667 d |
| 8 hr | 0.33333333 d |
| 9 hr | 0.375 d |
| 10 hr | 0.41666667 d |
| 11 hr | 0.45833333 d |
| 12 hr | 0.5 d |
| 13 hr | 0.54166667 d |
| 14 hr | 0.58333333 d |
| 15 hr | 0.625 d |
| 16 hr | 0.66666667 d |
| 17 hr | 0.70833333 d |
| 18 hr | 0.75 d |
| 19 hr | 0.79166667 d |
| 20 hr | 0.83333333 d |
| 21 hr | 0.875 d |
| 22 hr | 0.91666667 d |
| 23 hr | 0.95833333 d |
| 24 hr | 1 d |
| 25 hr | 1.041667 d |
| 26 hr | 1.083333 d |
| 27 hr | 1.125 d |
| 28 hr | 1.166667 d |
| 29 hr | 1.208333 d |
| 30 hr | 1.25 d |
| 31 hr | 1.291667 d |
| 32 hr | 1.333333 d |
| 33 hr | 1.375 d |
| 34 hr | 1.416667 d |
| 35 hr | 1.458333 d |
| 36 hr | 1.5 d |
| 37 hr | 1.541667 d |
| 38 hr | 1.583333 d |
| 39 hr | 1.625 d |
| 40 hr | 1.666667 d |
| 41 hr | 1.708333 d |
| 42 hr | 1.75 d |
| 43 hr | 1.791667 d |
| 44 hr | 1.833333 d |
| 45 hr | 1.875 d |
| 46 hr | 1.916667 d |
| 47 hr | 1.958333 d |
| 48 hr | 2 d |
| 49 hr | 2.041667 d |
| 50 hr | 2.083333 d |
| 60 hr | 2.5 d |
| 70 hr | 2.916667 d |
| 80 hr | 3.333333 d |
| 90 hr | 3.75 d |
| 100 hr | 4.166667 d |
Frequently asked questions
How many Days are in 1 Hours?
1 hr equals 0.04166667 d.
How do I convert Hours to Days?
Multiply the hr value by 0.04166667. Example: 25 hr = 1.041667 d.
What is 2.5 hr in d?
2.5 hr = 0.10416667 d.
Is the hr to d conversion exact?
Seconds, minutes, hours, days and weeks are exact. Months and years here use average Julian values (30.4375 days and 365.25 days), so a calendar conversion can differ slightly.
Does the calculator work offline?
Yes. The conversion runs in your browser with JavaScript, so it works after the page has loaded, even without a connection.