All 13 PartCaddy tools

Each one answers a single question with real reference data — part numbers and their aliases, published dimensions, manufacturer intervals — and shows the table it used. Free, no sign-up, and the maths runs in your browser.

Refrigerator water filters

Match your fridge to the exact filter part number, its aliases, and whether a generic fits.

Refrigerator water filters Fridge Filter Finder Enter your refrigerator brand and model — or the part number on your current filter — and get the exact compatible water-filter part number, cross-references, and generic options.

HVAC & furnace filters

Get the nominal size to order, and how often that filter actually needs changing.

HVAC & furnace filters Air Filter Size Checker Measure your furnace or AC filter and get the exact nominal size to order — the number stores actually use — plus its true dimensions and the right MERV rating. HVAC & furnace filters Air Filter Replacement Schedule Your filter thickness, pets, allergies and how hard your HVAC runs → how often to actually change the filter, your next-change date, and what a year of filters costs.

Vacuum bags & filters

Find the bag type or replacement filter your vacuum model takes.

Vacuum bags & filters Vacuum Bag & Filter Finder Enter your vacuum's brand and model and get the exact bag type or replacement filter it uses — part numbers, cross-references, and bagged-vs-bagless, all in one place.

Home comfort

Size a dehumidifier or humidifier to the room rather than guessing from a box claim.

Home comfort Dehumidifier Size Calculator Your square footage and how damp the space actually is give you the pints-per-day capacity to buy — on today's post-2019 rating scale, with the old-to-new conversion so you don't buy by the number on your old unit. Home comfort Humidifier Size Calculator Room volume plus how dry your air actually is gives you the output in gallons per day and the tank size to look for — sized to EPA's 30–50% humidity band, with the physics shown rather than a retailer's coverage claim.

Appliance decisions

The buy-or-fix and will-it-fit questions, answered against real dimensions and lifespans.

Appliance decisions Appliance Repair or Replace Calculator Enter the appliance, its age, the repair quote and what a new one costs — get a clear repair-or-replace call using the 50% rule and published appliance life expectancies. Appliance decisions Refrigerator Size Calculator Household size plus how you shop gives you the capacity in cubic feet — then we check your kitchen opening against real dimensions for every fridge type to tell you which ones actually fit. Appliance decisions Washer & Dryer Dimensions Checker Real washer and dryer dimensions from the ENERGY STAR certified datasets, checked against your opening — side by side, stacked, in a closet or under a counter, with the clearances and vent limits listings leave out.

Kitchen appliances

Adjust for what your appliance actually is, not what the recipe assumed.

Kitchen appliances Microwave Wattage Converter The recipe says 3 minutes at 1000 W but your microwave is 700 W. Enter both and get the corrected cooking time, plus the same time converted across every common wattage.

Home electronics

Programming codes and the steps that go with them.

Home electronics Universal Remote Code Finder Your remote's code list plus the device you're programming gives you the codes to try in order, the exact programming steps for that remote, and the auto-search fallback for when no published code works.

Outdoor equipment

Measure the part you have so you can match it.

Outdoor equipment Lawn Mower Blade Measuring Guide Measure your blade three ways and this builds the exact search specification — length, centre hole, profile and count — then checks it against your deck width and tells you what to confirm. It does not guess a part number, and we explain why.

Home office

Work out what a consumable really costs you per use.

Home office Printer Ink Cost Calculator Your cartridge price and its page yield give you the real cost per page, per month and per year — plus what XL or third-party cartridges would actually change, and when the answer is a different printer.