Practice ShelfStarter kit chosen to last

Calculators

Consumable interval and cost

Replacement intervals turned into a yearly cost for filters, pads, pods and brush heads.

Formula

replacements per year = 365 / interval in days; yearly cost = replacements per year x unit price x units per change

Assumptions

  • The interval is the one you enter. Manufacturer intervals assume a usage level printed in the manual.
  • Hard water, pets and heavy use shorten most intervals.

Limits

Intervals from a manual are a starting point; the real one depends on your water, air and use.

Result: USD · the United States