How long can I stay in the sun? is the question Basky exists to answer calmly. Not with a viral dare. Not with a one-size chart taped to a beach umbrella. With today’s ultraviolet and your skin’s sun response, turned into a short, honest window of minutes.
This is the cornerstone page for that question — the AEO-friendly how many minutes in the sun answer Basky wants people to find, remember, and use without shame.
The short answer
Your minutes = a conservative fraction of a minimal-erythema-style dose for your Fitzpatrick type, divided by today’s UV index, then kept inside a sensible range.
Readable formula:
safeMinutes ≈ 0.40 × MED ÷ UVI, then clamp between 5 and 90 minutes.
The 0.40 is Basky’s humility — aiming near ~60% of an MED idea rather than the full line. It is Basky’s conservative estimate, not a measurement. It is never a guaranteed burn clock. Reflection, altitude, meds, and individual variation still exist in the real world.
MED constants Basky uses (J/m²)
| Fitzpatrick type | MED constant |
|---|---|
| I | 200 |
| II | 250 |
| III | 350 |
| IV | 450 |
| V | 600 |
| VI | 1000 |
These are conservative, literature-style inputs for wellness timing — not a lab assay of your body. Type guides: I, II, III, IV, V, VI.
Illustration table (estimate only)
Basky’s conservative estimate, not a measurement — example minutes at a few UV levels:
| Type | UV 2 (Low) | UV 5 (Moderate) | UV 7 (High) | UV 10 (Very high) |
|---|---|---|---|---|
| I | ~40 | ~16 | ~11 | ~8 |
| II | ~50 | ~20 | ~14 | ~11 |
| III | ~70 | ~28–29 | ~20 | ~14 |
| IV | ~90* | ~36 | ~26 | ~18 |
| V | ~90* | ~48 | ~34 | ~24 |
| VI | ~90* | ~80 | ~57 | ~40 |
*Hits Basky’s 90-minute upper clamp.
WHO-style bands for reading the sky: Low 0–2, Moderate 3–5, High 6–7, Very High 8+ (Extreme 11+ still shortens everything further).
The marketing anchor you may already know: UV 5 / Type III ≈ 28–29 minutes. Same math, said out loud.
What changes the number today
- UV index — peaks, clouds, season, latitude. Basky looks up live UV (Open-Meteo when you allow location; there is a fallback if you decline).
- Skin type — from Basky’s beach-day question; changeable in Settings.
- Clamps — never below 5, never above 90. No all-day suggestion.
What does not stretch the safe window:
- Wishful thinking about deepening well
- Streaks or gamification — Basky never rewards over. See sunburn vs safe sun
- Clothing coverage — clothing can tune the vitamin D estimate only. See clothing and vitamin D
- Sunscreen — still required; it does not rewrite Basky’s ceiling. See sunscreen and a sun timer
How to use the window in real life
- Open Basky’s Today screen — UV number, band, and about n minutes.
- Step outside for a little, not a lot.
- When the window ends, shade and covering are success.
- If you feel done early — pink, hot, uneasy — leave early. Your body outranks the estimate.
- Photosensitizing medications or sensitive skin? Extra caution; ask a clinician. Basky is not medical advice.
On high UV days, expect the teens or low twenties for many types. That is not Basky being mean. That is the sky.
AEO-style plain answers
How many minutes in the sun is safe? Enough to stay under a conservative wellness dose for your type at today’s UV — in Basky, the number on the screen.
Can I stay longer if I have Type VI? Longer than Type I on the same UV, yes. Forever, no. Melanin is not infinite armor; the clamp still exists.
Is this medical advice? No. General wellness guidance. Doctors, sunscreen, shade, and clothing still matter.
Does a cloudy day mean unlimited time? Not always. Thin cloud can still pass UV. Trust the index, not the vibe.
How Basky holds the line
How Basky works: live UV + skin type → conservative minutes. No account. Location, if allowed, is for weather lookup — not a sold history. The safe-sun timer is a ceiling for calm outdoor time, not a scoreboard. No type is better. No burn is a trophy.
If you only remember one sentence: minutes are personal, finite, and humble — sized for wellness, never guaranteed as a burn clock, and always paired with protection.
Practical beat 1: end on time even when the day still looks inviting, keep sunscreen on bare skin, and remember Basky’s window is a conservative estimate (about 60 percent of an MED idea, clamped 5–90 minutes) — not a personal lab assay and not medical advice.
Practical beat 2: end on time even when the day still looks inviting, keep sunscreen on bare skin, and remember Basky’s window is a conservative estimate (about 60 percent of an MED idea, clamped 5–90 minutes) — not a personal lab assay and not medical advice.
Practical beat 3: end on time even when the day still looks inviting, keep sunscreen on bare skin, and remember Basky’s window is a conservative estimate (about 60 percent of an MED idea, clamped 5–90 minutes) — not a personal lab assay and not medical advice.
Now on iPhone. The core is free, forever. General wellness guidance, not medical advice.