Hours Of Daylight Calculator

Latitude: Day of Year: Calculate

Result:

Introduction

The Hours Of Daylight Calculator is a useful tool for determining the approximate number of daylight hours at a specific latitude and on a particular day of the year. Understanding daylight hours is crucial for various applications, including agriculture, outdoor activities, and energy management.

Formula

The calculation is based on the solar declination angle and the latitude of the location. The formula used is:

Daylight Hours=215×Hour AngleDaylight Hours=152​×Hour Angle

Where the Hour Angle is determined by the solar declination angle and the latitude of the location.

How to Use

1. Enter the latitude of the location in the ‘Latitude’ field. Valid range is from -90 to 90 degrees.
2. Enter the day of the year in the ‘Day of Year’ field. Valid range is from 1 to 365.
3. Click the ‘Calculate’ button to see the result instantly.

Example

Suppose you want to find the daylight hours for New York City (latitude 40.71°) on the 150th day of the year:

• Enter 40.71 in the ‘Latitude’ field.
• Enter 150 in the ‘Day of Year’ field.
• Click ‘Calculate’.

The result will be displayed as “Result: XX.XX hours.”

FAQs

1. Q: Can I enter decimal values for latitude?
   • A: Yes, latitude can be entered as a decimal, for example, 37.5.
2. Q: What happens if I enter an invalid latitude or day of the year?
   • A: The calculator will alert you with an error message, prompting for valid input.
3. Q: Is there a limit to the latitude range I can enter?
   • A: Latitude must be between -90 and 90 degrees.
4. Q: Can I use negative values for latitude?
   • A: Yes, negative values represent locations in the southern hemisphere.
5. Q: Does the calculator account for daylight saving time?
   • A: No, the calculator provides standard time calculations.
6. Q: How accurate is the calculation?
   • A: The calculation provides a good approximation, but actual daylight duration may vary due to atmospheric conditions.
7. Q: Is there a mobile-friendly version of the calculator?
   • A: Yes, the calculator is responsive and can be used on mobile devices.
8. Q: Can I use the calculator offline?
   • A: No, this calculator requires an internet connection to function.
9. Q: Can I calculate daylight hours for any location on Earth?
   • A: Yes, as long as you provide a valid latitude.
10. Q: What unit is used for the result?
    • A: The result is displayed in hours.

Conclusion

The Hours Of Daylight Calculator simplifies the process of determining daylight hours, providing a valuable tool for various fields. Whether for agricultural planning or outdoor event scheduling, this calculator offers a quick and accurate solution for understanding daylight duration throughout the year.