Calculator
Skincare replacement-cost calculator
Estimate spending from your own replacement interval. This calculator does not recommend how often to apply or replace a product. Enter what you expect to spend and how long a package lasts in your own planning.
Results
Results appear here after you press Calculate. Nothing you enter leaves this page.
Input rules
- Rows: one to six products; optional plain-text label up to 60 characters.
- Package price: USD 0-10,000, two decimals. Zero supports an already-owned/free item scenario.
- Days per package: integer 1-3,650; required for every active row. No default consumption assumption.
- Optional annual extras: USD 0-10,000 for shipping or other budget allowance; default 0, clearly labeled.
Worked examples
Each example is worked through step by step, so you can check the arithmetic.
One package
- A $12 package every 60 days = $73.00 annualized.
Two packages
- A $20 package every 90 days = $81.1111 annualized.
- Together: $154.11 annually, $12.84 monthly equivalent and $32.00 upfront.
With annual extras
- Add $24 annual extras: $178.11 annually and $14.84 monthly.
- Upfront stays $32.00: extras are not part of the upfront total.
Valid and invalid entries
- Zero price is valid; zero interval is invalid.
- Deleted rows contribute nothing.
Next step
A skincare shopping plan for a fixed budget
Set a spending amount first, then keep upfront and annualized totals separate.
