Days to Hours Converter (d to h) + Formula
One day equals 24 hours — multiply days by 24 to convert to hours. To reverse it, divide hours by 24. This is fixed by the definition of a standard 24-hour day.
The formula
Multiply your day value by 24 to get hours.
h = d × 24
Example: 7 days × 24 = 168 hoursA calendar day is defined as exactly 24 hours, so the conversion is a simple constant multiplication.
Conversion table
| Days | Hours (h) |
|---|---|
| 1 | 24 |
| 2 | 48 |
| 3 | 72 |
| 5 | 120 |
| 7 | 168 |
| 10 | 240 |
| 14 | 336 |
| 30 | 720 |
| 100 | 2400 |
| 365 | 8760 |
How to convert online
- Type the number of days into the first box.
- Read the equivalent in hours instantly in the second box.
- Enter an hour value instead to convert back to days.
Use the Day to Hour Converter — free and instant in your browser.
Where this conversion is used
Days-to-hours conversion is everyday work in project planning and scheduling, hourly billing and timesheets, service-level agreements, and any calculation that turns a duration in days into the hours needed for staffing, rates or countdowns.
FAQ
How many hours are in a day?
There are exactly 24 hours in one day. For example, 7 days is 168 hours and 30 days is 720 hours.
How many hours are in a week?
A week is 7 days, so 7 × 24 = 168 hours.
Is the conversion exact?
Yes — a standard day is defined as 24 hours, so 24 is an exact factor with no rounding.
How do I convert hours back to days?
Divide hours by 24, or use our Hour to Day converter for the reverse direction.
Related converters
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