Every Toolkit

Sunscreen Calculator

Calculate protection time and sunscreen needs based on your skin type and UV conditions

600
Minutes Protected
5
UV Index
Moderate
80
Reapply (min)
SPF 30
Current SPF

Your Information

Enter your details for personalized recommendations

Sometimes burns, tans gradually

Moderate (3-5)

Sun Protection Analysis

Protection Duration

With SPF 30 and your skin type, you're protected for approximately 600 minutes (10.0 hours).

Reapplication

Reapply every 80 minutes

Amount Needed

Body: 1 oz • Face: 0.25 oz
Total: 1.25 oz per application

Recommendations

  • Use SPF 15+ for current UV index (5)
  • Apply sunscreen 15-30 minutes before sun exposure
  • Use about 1 oz (shot glass) for full body coverage
  • Don't forget ears, neck, feet, and hands

Application History (0)

No applications logged yet. Log your first application!

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Understanding Sun Protection

What is SPF?

SPF (Sun Protection Factor) measures how well sunscreen protects against UVB rays. SPF 30 blocks about 97% of UVB rays, while SPF 50 blocks about 98%. No sunscreen blocks 100% of UV rays.

Fitzpatrick Skin Types

Type 1 (Very Fair): Always burns, never tans
Type 2 (Fair): Usually burns, tans minimally
Type 3 (Light): Sometimes burns, tans gradually
Type 4 (Medium): Rarely burns, tans easily
Type 5 (Dark): Very rarely burns, tans very easily
Type 6 (Very Dark): Never burns, deeply pigmented

UV Index Guide

0-2: LowMinimal protection needed
3-5: ModerateWear sunscreen, hat recommended
6-7: HighProtection essential, seek shade midday
8-10: Very HighExtra protection required, avoid sun 10 AM-4 PM
11+: ExtremeTake all precautions, stay indoors if possible

Application Tips

  • Apply 15-30 minutes before going outside
  • Use 1 ounce (2 tablespoons) for full body coverage
  • Reapply every 2 hours or after swimming/sweating
  • Don't forget often-missed spots: ears, feet, back of neck, hands
  • Use lip balm with SPF 15+ for lips
  • Check expiration dates - sunscreen typically lasts 3 years
  • Use broad-spectrum sunscreen (protects against UVA and UVB)

Features

  • Calculate protection time based on skin type and SPF
  • Get personalized reapplication schedules
  • UV index-based recommendations
  • Track sunscreen applications with timestamps
  • Water activity adjustments
  • Amount needed calculations
  • Color-coded UV risk levels
  • Local storage for privacy

Health Disclaimer

This calculator provides general guidance only. Individual sun sensitivity varies. Always consult healthcare professionals for personalized advice. No sunscreen provides 100% protection - use additional protective measures like clothing, hats, and shade.