The time it takes to tan depends on several factors including your skin type, the intensity of the sun, and how long you are exposed to UV rays. Here is a general guideline by skin type and tanning time:

• Very Fair Skin: Burns easily and almost never tans; may take about 6 to 7 cumulative hours of sun exposure.
• Light Skin: Burns often, tans slightly; about 4 to 6 hours spread over several days.
• Medium Skin: Sometimes burns, gradually tans; about 2 to 4 hours.
• Dark Skin: Burns rarely, tans easily; between 1 to 3 hours.
• Very Dark Skin: Almost never burns, tans very easily; from 1 hour and up.

Most people start seeing a light tan within 1 to 2 hours of sun exposure, but it may take multiple days of exposure to develop a noticeable tan. Gradually increasing time in the sun while using sunscreen with appropriate SPF is recommended to tan safely without burning. Additionally, it usually takes 1 to 3 days for a tan to fully develop visibly after sun exposure, as melanin production and transfer to skin cells takes time. In summary, to get a tan you can expect anywhere from about 1 to 6 hours of sun exposure spread over a few days, depending on your skin type and sun intensity. Safe and gradual tanning with sunscreen protection is advised to minimize skin damage risks.