Free tools
Free skincare tools
Four calculators for the questions people ask most about skincare: what you can mix, what order it goes on, how much sunscreen you need, and when a product has had its day.
Can I mix these? Skincare ingredient checker
Pick any two skincare ingredients to see whether they work together, belong at different times of day, or should not be layered at all.
Open the tool →
Skincare routine order builder
Tick the products you use and get them in the right order for morning and evening, with a note wherever two of them belong on different days.
Open the tool →
Sunscreen calculator: how much do you need?
Work out how much sunscreen to use on your face or body, how long a bottle lasts, how many to pack for a trip, and whether yours fits in a carry-on.
Open the tool →
Skincare expiry calculator
Enter the day you opened a product and the symbol on its pack to see the date to use it by, and what the small open-jar number actually means.
Open the tool →