Calculateur des coûts de routine de soins de la peau

The Skincare Routine Cost Calculator computes the total annual, monthly, and daily cost of your complete skincare routine across all product categories: cleanser, toner/essence, AM serum, PM serum, moisturizer, sunscreen, and treatment products like retinol or chemical exfoliants. The calculator accounts for each product's purchase price and how long it lasts at typical usage, then aggregates per-product monthly costs to a complete routine total. Modern routines following Western dermatology, K-beauty (Korean), or J-beauty (Japanese) conventions can include 6-10+ products and easily exceed $1,500-$2,500 annually — making this calculator essential for understanding the true financial commitment of a comprehensive skincare routine. Skincare spending has grown dramatically since 2015, driven by social media (TikTok skincare influencers, Instagram before/after content), aging Millennial consumers focused on prevention, and the rise of premium 'derm-recommended' brands like Skinceuticals, La Mer, SkinMedica, and Augustinus Bader. The global skincare market reached $145 billion in 2023 with Americans averaging $313/year on skincare alone — more than any other personal care category. Heavy users (those following influencer routines or 'high-functioning' regimens) can spend $1,500-$5,000+ annually on skincare products. The calculator's value lies in revealing per-product monthly costs that aggregate to surprising totals. A reasonable-looking routine of 7 mid-tier products at $25-60 each can total $400-700 annually. Premium routines using brands like SkinCeuticals C E Ferulic ($182), La Mer ($380 moisturizer), or Augustinus Bader ($295 cream) easily exceed $2,000 annually for a 5-7 product routine. Understanding these totals enables informed decisions: is the premium product genuinely better, or am I paying for marketing? Can I substitute drugstore alternatives (CeraVe, La Roche-Posay, The Ordinary) for the same actives at 10-30% of premium prices? This calculator helps you audit your current routine, model different brand/tier combinations, and make conscious decisions about which products genuinely contribute to results vs which are habits or impulse purchases. Enter price and expected duration for each routine slot. The calculator outputs total monthly cost, annual cost, daily cost, products count, and a 10-year invested projection (showing the opportunity cost of routine spending vs investing the difference). Use the comparison feature to test alternative routines (premium vs budget, simplified vs comprehensive) and see the financial impact before making changes.

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1. 1Step 1 — List Every Product in Your Routine: Walk through your AM and PM routines and identify every product used. Common slots: cleanser (AM+PM), toner/essence, AM serum (vitamin C, hyaluronic acid), PM serum (retinol, peptides), moisturizer (AM+PM if different), sunscreen (AM, every 2 hours outdoors), and weekly/biweekly treatments (chemical exfoliants, masks). Most routines have 5-8 active products.
2. 2Step 2 — Enter Price for Each Product: Use your typical purchase price including any sales or membership discounts you regularly access. Most users buy from Sephora, Ulta, Amazon, or brand direct websites. If you typically buy on sale (15-20% off), use the sale price. Don't enter retail price you never actually pay.
3. 3Step 3 — Estimate How Long Each Product Lasts: Be realistic, not optimistic. Most people use products faster than they expect. Cleanser at twice-daily use with quarter-size dollop: ~2-3 months for 150ml bottle. Serum at twice-daily 2-3 drops: ~2-3 months for 30ml bottle. Moisturizer: similar to cleanser. Sunscreen used properly (1.25ml face): ~1-2 months for 50ml tube.
4. 4Step 4 — Note Period After Opening (PAO) Constraints: Products labeled '6M' open jar PAO last only 6 months after opening regardless of physical contents remaining. If you finish in 4 months, no waste. If you take 9 months, the last 3 months provide reduced efficacy. Many users discard products past PAO; build this into your duration estimates.
5. 5Step 5 — Calculator Computes Per-Product Monthly Cost: For each product: Monthly Cost = Price / Months Lasting. Example: $45 moisturizer lasting 3 months = $15/month. The calculator sums these across all products for total monthly routine cost.
6. 6Step 6 — Review Total Routine Cost: Monthly × 12 = annual cost. Divided by 365 = daily cost. Most users find annual cost surprising — a 'reasonable' routine often totals $500-1,500/year. Premium routines easily $2,000+. The calculator categorizes: under $300 (basic), $300-800 (standard), $800-1,500 (comprehensive), $1,500+ (premium/luxury).
7. 7Step 7 — Review 10-Year Invested Projection: Calculator shows what annual routine cost invested at 7% return would compound to over 10 years. A $750 annual routine compounded becomes $10,365 over 10 years. This framing helps evaluate whether the routine provides $10k+ of value or is partly habit/impulse spending.

• !Overestimating shelf life — products labeled '12 months after opening' lose potency in 4-6 months for actives like vitamin C and retinol.
• !Not factoring in unfinished products thrown away due to spoilage, change of routine, or trends that come and go.
• !Ignoring the cost of seasonal additions — heavier moisturizers in winter, more sunscreen in summer add 15-25% to annual cost.
• !Counting sample sizes — calculate based on full-size products you actually purchase regularly, not samples that don't reflect ongoing cost.
• !Stretching products beyond reasonable use — applying smaller-than-optimal amounts of expensive products to make them last reduces both efficacy and value.