Estimate sun exposure risk from UV index, skin sensitivity, exposure time, sunscreen SPF, shade level, cloud cover, and reflective surfaces. This calculator gives rough burn-time, SPF-adjusted time, and protection guidance.
UV index:
Enter the forecast or observed UV index for your location and time of day.
Exposure time:
Enter how long you plan to be outside.
Skin sensitivity:
Select a general burn sensitivity level. More sensitive skin has a shorter estimated burn time.
Protection factors:
Sunscreen, shade, clouds, altitude, and surface reflection adjust the exposure estimate.
A sun exposure calculator is useful for beach days, pool time, outdoor work, sports, gardening, hiking, travel, snow activities, and planning how much sun protection you may need.
This calculator is a rough planning tool. Real sunburn risk varies by skin, medication, time of day, latitude, altitude, clouds, shade, sweat, water, and sunscreen use.
Your result compares planned exposure time with estimated burn time and SPF-adjusted time. If planned exposure is above the estimated burn time, sun protection is especially important.
This calculator adjusts UV index for shade, clouds, altitude, and reflection, then compares exposure time with an estimated burn time.
No. SPF protection depends on applying enough sunscreen, reapplying it, sweating, swimming, rubbing, and individual skin sensitivity.
Yes. Shade lowers direct exposure, but reflected and scattered UV can still reach your skin.
No. Clouds can reduce UV, but UV can still pass through clouds and cause sunburn.