UV Safe TanHow Long Does It Take to Get Sunburned? Times by UV Index and Skin Type
Short answer: at a high UV index of 8, unprotected very fair skin (type I) can start to burn in about 17 minutes, fair skin (type II) in about 21, and olive skin (type IV) in about 38. Burn time halves every time the UV index doubles. Sunburn often shows up 4 to 6 hours after the damage, so do not wait to see redness before getting out of the sun.
Estimated minutes to first redness, no sunscreen
| Skin type | UV 3 | UV 6 | UV 8 | UV 10 |
|---|---|---|---|---|
| Type I | 44 min | 22 min | 17 min | 13 min |
| Type II | 56 min | 28 min | 21 min | 17 min |
| Type III | 67 min | 33 min | 25 min | 20 min |
| Type IV | 100 min | 50 min | 38 min | 30 min |
| Type V | 133 min | 67 min | 50 min | 40 min |
| Type VI | 222 min | 111 min | 83 min | 67 min |
How to find your skin type
- Type I: very fair, always burns, never tans, often freckles.
- Type II: fair, burns easily, tans minimally.
- Type III: light, burns moderately, tans gradually.
- Type IV: olive, burns minimally, tans easily.
- Type V: brown, rarely burns, tans deeply.
- Type VI: deeply pigmented, almost never burns, but still takes UV damage.
More detail in our Fitzpatrick skin type guide.
How much longer does sunscreen give you?
SPF 30 in a lab means 30 times the dose to burn. In real life most people apply roughly half the tested amount of 2 mg per square centimetre, which cuts protection sharply. A realistic rule of thumb is to credit about half the number on the bottle, and to reapply every 2 hours regardless. See how often to reapply sunscreen.
Why a fixed number is never quite right
UV rises through the morning, peaks around solar noon and falls through the afternoon. Ten minutes at 1 PM is a far bigger dose than ten minutes at 5 PM. The honest way to estimate burn time is to add up the dose minute by minute against the forecast, which is hard to do in your head on a beach.
Letting UV Safe Tan do the maths
UV Safe Tan does exactly that. Pick your skin type and SPF, turn on the sand or water option at the beach, and it integrates the hourly UV forecast to give you a live countdown. Start the timer and it stretches automatically as the sun drops, with a Live Activity on your Lock Screen so you can see the time left without unlocking.
UV Safe Tan is coming soon
Live UV index for where you are, a burn timer set by your skin type and SPF, reapply reminders, a tan timer that stops before you burn, and Home Screen widgets. For iPhone and iPad.
Coming soon to theApp StoreMore guides
What the UV index means
The 0 to 11+ scale, level by level, and what to do at each number.
Read guideHow often to reapply sunscreen
The 2 hour rule, when to reapply sooner, and how much sunscreen is enough.
Read guideHow to tan without burning
Short sessions, the right hours and a clear stopping point, minus the myths.
Read guide