What this calculator does
Toilet paper: how long a pack lasts works out how many days a pack of toilet roll lasts a household, from usage per person. Enter your own figures above and the answer updates as you type: nothing is fixed in the code, so the result reflects exactly the numbers you supply.
The formula this calculator evaluates is printed under the tool and explained below, so you can check the working by hand or reuse it in a spreadsheet.
The formula
FormulaTotal sheets = rolls × sheets per roll; days = total sheets / (people × sheets per use × uses per day)
The inputs explained
| Field | What to enter |
|---|---|
| Rolls in the pack | A number. Starts at 24. |
| Sheets per roll | A number. Starts at 200. |
| People in the household | A number. Starts at 4. |
| Sheets used, per use | A number. Starts at 6. |
| Uses per person, per day | A number. Starts at 5. |
Worked examples
Every figure in the tables below is produced by this page’s own calculator at build time, so the numbers and the tool always agree. Select any row to load that scenario.
How the answer changes with rolls in the pack
Every other input is held at the calculator’s starting values while rolls in the pack varies. Select any row to load that scenario into the calculator.