Sunscreen Usage Calculator
Select Body Areas
User Reviews
“I love this calculator! It’s super easy to use and gives me the right amount of sunscreen to apply every time.” – Sarah, Type III Skin
“As a person with fair skin, this tool helps me make sure I’m applying enough sunscreen for long days outdoors.” – Emily, Type II Skin
“The sunscreen calculator has been so helpful in planning my beach trips. Highly recommend!” – John, Type IV Skin
More Online Free Tools Here
How to Use the Sunscreen Calculator – A Step-by-Step Guide
Our Sunscreen Calculator helps you determine the exact amount of sunscreen needed for optimal sun protection. Follow these simple steps to get accurate results:
Step 1: Enter Your Body Details
- Select your skin type as sunscreen needs may vary slightly based on skin type.
- Input your height and weight for a personalized calculation based on body surface area.
Step 2: Choose The Time of Sun Exposure
- Enter your time duration for which you are exposed in sunlight.
- Enter the value of Ultra Violet ( UV ) Index, as this affects the quantity of sunscreen.
Step 3: Select Skin Exposure Areas
- Check the body parts exposed to the sun (face, arms, legs, torso, etc.).
- The calculator adjusts the recommended sunscreen quantity based on coverage.
Step 4: First calculate BSA and then Sunscreen needed
First calculate the BSA by entering Height in cm and weight in kg above then you can select the body parts for calculating amount of sunscreen required for your body.
Step 5: Get Your Sunscreen Amount
- Click "Calculate" to see the exact milliliters (mL) or grams (g) of sunscreen needed.
- The results will also suggest reapplication frequency (every 2 hours or after swimming/sweating).
Pro Tips for Best Results:
✔ Use the "Two-Finger Rule" for face application (a line of sunscreen on two fingers).
✔ Don’t miss spots like ears, neck, and back of hands.
✔ Reapply every 2 hours for continuous protection.
Why Use Our Sunscreen Calculator?
- Prevents Under-Application – Most people use only 25–50% of the required sunscreen.
- Avoids Waste – No guesswork; apply just the right amount.
- Customized for You – Adjusts for body size, SPF, and activity level.
Try it now and protect your skin perfectly with help of this sunscreen calculator ! Also read the science behind the sunscreen
1. How much sunscreen should I use on my face?
For full protection, use ½ teaspoon (approx. 1.25 mL) for your face, as per dermatologists. Our sunscreen calculator personalizes this based on your face size and SPF.
2. How often should I reapply sunscreen?
Reapply every 2 hours, or immediately after swimming/sweating. The sunscreen calculator factors in activity levels for precise reapplication timing.
3. What’s the difference between SPF 30 and SPF 50?
SPF 30 blocks ~97% UVB rays, while SPF 50 blocks ~98%. Higher SPF offers marginal extra protection but requires the same amount (2 mg/cm²)—use our sunscreen calculator to measure correctly.
4. Can I use the same sunscreen for face and body?
Yes, but facial sunscreens are often less greasy/non-comedogenic. For exact quantities per zone, check our sunscreen calculator.
5. Do I need sunscreen on cloudy days?
Up to 80% of UV rays penetrate clouds. Use the calculator to adjust for weather conditions.
6. Is sunscreen necessary for dark skin?
Absolutely. Dark skin can still burn and suffers UV damage. Our calculator recommends amounts for all skin tones.
7. Does sunscreen expire?
Yes! Most expire after 3 years (check the packaging). Expired sunscreen loses effectiveness—calculate fresh needs via our calculator.
8. Can I mix sunscreen with moisturizer?
Not ideal—it dilutes SPF. Apply sunscreen separately (use the calculator for layering tips).
9. What’s the best sunscreen for acne-prone skin?
Opt for oil-free, non-comedogenic SPF 30+. The calculator adjusts amounts to avoid clogging pores.