Convert days to hours instantly. Enter a value below, or use the formula and reference table further down the page.
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How to convert days to hours
Multiply the value by 24.
h = d × 24Example: 10 d = 240 h.
Days to Hours conversion table
| Days (d) | Hours (h) |
|---|---|
| 1 d | 24 h |
| 2 d | 48 h |
| 3 d | 72 h |
| 4 d | 96 h |
| 5 d | 120 h |
| 10 d | 240 h |
| 15 d | 360 h |
| 20 d | 480 h |
| 25 d | 600 h |
| 50 d | 1200 h |
| 100 d | 2400 h |
Frequently asked questions
How many hours is 1 day?
1 day equals 24 hours.
What is the formula to convert d to h?
To convert d to h, multiply the value by 24. The full formula is: h = d × 24.
How do I convert hours back to days?
Use the same calculator above and type your value into the hours field instead — it converts in both directions. Or use the reverse formula: d = h ÷ 24.
Is the d to h conversion exact?
The conversion factor used here (24) is the standard internationally defined value. Results on this page are rounded to four decimal places for readability.