Daylight Calculator

Daylight Calculator shows the number of daylight hours for every day of the year at any given latitude. It shows a graph of daylight hours over the entire year. (more...)

Start Daylight Calculator

More about Daylight Calculator

By default the day is set to today's date and the latitude is set to your current location (if geolocation is available). There are a number of ways to change the date.

  • Select a date using the month and day controls
  • Use the slider to select the day of year
  • Click or touch the daylight hours graph and drag to change the day of year

Daylight Calculator is still a work in progress. Send me your suggestions