Get the most out of the household products you rebuy.
Calculators
Every calculator runs entirely in your browser — no server calls, no data collection. Each one states its assumptions and sources them; where a figure genuinely varies by product, it's a field you fill in yourself rather than a number we guess for you.
Figure out how long a stick of deodorant lasts you, how many you use a year, and when to reorder, from your stick size or how long your last one lasted.
Figure out how many changes, boxes, and reorders your baby's stage actually adds up to each year, based on the American Academy of Pediatrics' own guidance.
How many dishwasher pods do you use in a year? Enter your runs per week and pack size to get pods per year, packs per year, and how often you'll reorder.
Figure out how many servings, bags, and reorders your pet's food actually adds up to each year, based on the same weight-driven formula veterinarians use.
Figure out how often your HVAC filter actually needs replacing and how many you'll go through a year, adjusted for pets, allergies, and filter thickness.
How long does a bottle of laundry detergent last? Enter your loads per week and the loads per bottle to see bottles a year and how often you'll reorder.
Calculate how much toilet paper and paper towel your household uses. Enter rolls per week and get the rolls per year for each, plus how often to reorder.
A garbage bag calculator for your can size. Enter your household and the bags you tie off a week to get gallons and bags a year, starting from EPA waste data.
Figure out how often your pitcher or faucet filter actually needs replacing, based on your household's water use and your filter's own stated capacity.
