Free home calculators
Every calculator below is free, runs in your browser, and needs no signup.
All free home calculators
Fridge Matcher
Tell us your trip length, group size, power and budget. Get the right capacity and the fridges that fit, ranked by our score.
Match my tripBattery Runtime Calculator
How many hours a battery or power station runs your fridge at your temperatures — and how much solar keeps it going.
Calculate runtimeFridge vs Ice Cost
What you spend on ice and spoiled food each year, and how many trips it takes a 12V fridge to pay for itself.
Do the mathFrequently asked questions
Are the home calculators free to use?
Yes. Every calculator on Portable Fridge Guide runs entirely in the browser, needs no account or email, and shows the full result without a paywall. Nothing you type is sent to us — the math happens on your device.
How accurate are the home calculators?
They use the published specifications and price ranges from our comparison data, with the same assumptions stated on each tool page. Results are estimates for planning, not a substitute for a site survey, a licensed installer or the manufacturer's own sizing table. Check the current spec sheet before you buy.
Can I link to a specific calculator instead of embedding it?
Yes — linking is always welcome and needs no permission. Each tool has a permanent page under /tools/ with the method and assumptions written out, so a link stays useful even if our embed programme changes.