Cost of bottled water
Bottled water is one of the easiest habits to swap — and the yearly cost versus a refillable bottle is striking.
I spend € each, times a .
Invested at % a year instead, by age 65 that's €0. You're now.
Runs in your browser · nothing stored · estimate: price × frequency × 52, invested as a yearly contribution.
Enter the price of a bottle and how many you buy a week to see the yearly and ten-year total.
A refillable bottle is a near-free swap; the invested figure shows what the difference could become.
Yearly cost = price × times per week × 52. The “if invested” figures assume you put the same amount in each year and it grows at the rate you set (default 7%) — an ordinary annuity. They're estimates to show scale, not guaranteed returns.
Multiply what you pay each time by how often you buy it, then by 52 weeks. The calculator above does it instantly — for many people a regular habit runs into four figures a year.
Enter your real numbers and look at the “invested to age 65” figure. Redirecting even part of the yearly cost into savings compounds into a far larger sum over time.
Yearly cost = price × times per week × 52. The invested estimate assumes the same amount added each year, growing at the rate you set (7% by default). Everything runs in your browser and nothing is stored.