True-cost calculator

A filter's price tag is the down payment; the cartridges are the mortgage. Compare five years of any system against bottled water - prefilled from the prices and running costs we track, and every number is editable.

System System price ($) Filter / upkeep cost per year ($) What your household spends on bottled water per week ($) Compare over (years)

Estimates only: system and filter figures are the tracked prices we publish (checked October 23, 2026); bottled-water spending is your input. Installation, where a system needs it, is extra - see the quotes guide for installed ranges.