Days to Hours
1 day = 24 hours · 1 h = 0.041667 d
1 day = 24 hours
How it’s calculated
h = d × 24
- Multiply the value in days by 24.
- To go back, divide by 24 (or multiply by 0.04166666667).
- 1 d = 24 h · 1 h = 0.04166666667 d
Show worked solutionFactor, unit cancellation and rounding, step by step
Find the conversion factor
By definition 1 d = 86400 s and 1 h = 3600 s, so 1 d = 24 h. Source: BIPM SI Brochure (9th ed.) (SI prefixes and accepted units).
Multiply by the factor written as a fraction
Put d in the denominator so it cancels, leaving h.
Calculate (unrounded)
Round the answer
Rounded to 5 significant figures.
Answer: 24 h
1 d in other units
Batch convert d → h
Results
- 1 d = 24 h
- 5 d = 120 h
- 10 d = 240 h
- 25 d = 600 h
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Quick examples
- 1 day = 24 hours
- 5 days = 120 hours
- 10 days = 240 hours
- 25 days = 600 hours
- 100 days = 2,400 hours
About these units
Day (d)
SI (metric)
1 d = 86400 s
Source: BIPM SI Brochure (9th ed.) (SI prefixes and accepted units)
Hour (h)
SI (metric)
1 h = 3600 s
Source: BIPM SI Brochure (9th ed.) (SI prefixes and accepted units)
Days to hours conversion table
| Days (d) | Hours (h) |
|---|---|
| 0.1 d | 2.4 h |
| 0.5 d | 12 h |
| 1 d | 24 h |
| 2 d | 48 h |
| 3 d | 72 h |
| 4 d | 96 h |
| 5 d | 120 h |
| 6 d | 144 h |
| 7 d | 168 h |
| 8 d | 192 h |
| 9 d | 216 h |
| 10 d | 240 h |
| 15 d | 360 h |
| 20 d | 480 h |
| 25 d | 600 h |
| 30 d | 720 h |
| 40 d | 960 h |
| 50 d | 1,200 h |
| 75 d | 1,800 h |
| 100 d | 2,400 h |
| 250 d | 6,000 h |
| 500 d | 12,000 h |
| 1,000 d | 24,000 h |
Related conversions
Frequently asked questions
How do I convert days to hours?
Use h = d × 24. Multiply the value in days by 24.
How many hours are in 1 day?
1 day (d) equals 24 hours (h).
How many days are in 1 hour?
1 hour (h) equals 0.041667 days (d); more precisely 0.04166666667.
What is 10 d in h?
10 days = 240 hours.
Formula: h = d × 24. Factors last reviewed 2026-10-27.