Why Use a Vitamin D Calculator?
Vitamin D is unique—it’s produced when your skin is exposed to sunlight. But factors like location, skin tone, season, and time outdoors affect how much you make. Our Vitamin D from sun calculator helps estimate your natural production and dietary needs.
Vitamin D & Sunlight Exposure
Just 10–30 minutes of midday sun several times a week may be enough for lighter skin tones. Darker skin requires longer exposure. Our tool considers your lifestyle to suggest if you need supplements.
Complete Vitamin Profile
Beyond Vitamin D, we calculate needs for B12 (critical for vegans), Iron (higher for women), Calcium, Magnesium, and more—based on your age, gender, diet, and activity.
Frequently Asked Questions
While this tool doesn’t directly measure sun exposure minutes, it estimates your Vitamin D needs based on standard guidelines. For precise sun exposure advice, consult a dermatologist or use a UV index tracker alongside this calculator.
It depends on your location, skin type, time of year, and daily habits. People in northern latitudes or with darker skin often need supplements, especially in winter.
Our estimates follow NIH and WHO guidelines. However, individual needs vary. Always consult a healthcare provider before starting supplements.