๐ฑ Gardening
Sunlight Hours Calculator
Day length depends only on latitude and the date, following a curve that changes fastest around the equinoxes. A garden at 55 degrees north gains over four minutes of daylight a day in March but almost nothing in late June, which is why spring growth suddenly accelerates.
How it works
Latitude
Date
Clock offset from solar time
Hours of daily shade (walls, trees)
Daylight
Sunrise
Sunset
Solar noon
Change in daylight per day
Usable direct sun
Season
What this means
Frequently asked questions
How do I use the Sunlight Hours Calculator?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.