Korean beauty value: compare size without mixing units
A practical method for comparing product prices when sizes are stated in grams or millilitres.
A practical method for comparing product prices when sizes are stated in grams or millilitres. This guide is written by THE CAST, a Korean beauty retailer.
Match the product role
Compare products used for the same purpose and read the full directions; a wash and a lotion perform different jobs.
Calculate only comparable units
For two products both measured in grams, divide price by grams and multiply by 10 for a per-10g comparison. Use the same method for millilitres but do not convert grams to millilitres.
Include the real order total
Unit price is not a measure of quality or suitability. Add delivery and any applicable import costs and check current options before ordering.