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Check if your computer can handle it before you install.

Four free calculators, no sign-up and no cookies. They tell you which AI models fit on your machine, how much RAM, CPU and disk the repos you want to host ask for, what the electricity for a home server costs, and whether it is better to self-host or keep paying the subscription.

By Jorge Aguilar · Reviewed October 29, 2026

The calculators

Local AI Which AI model runs on my computer? Pick your machine (Mac, PC with or without a GPU), your memory and the context you want. I show you which open models fit, with which quantization and an approximate speed. Use it if: you want to run an AI model and do not know whether your Mac or PC can handle it. Open the calculator Home server Can my machine handle these repos? Tick the repos you want to self-host and add up the RAM, CPU and disk they ask for. Compare with a Raspberry Pi, a mini PC, a VPS or your own machine. Use it if: you already know which repos you want to install and need to know whether your machine (or a VPS) has the RAM, CPU and disk. Open the calculator Electricity How much does it cost to keep a server on 24/7? Enter the watts of your mini PC, Raspberry Pi or NAS and your price per kWh (with the Tarifa 1 rates from CFE, Mexico's state electricity utility). You get the cost per month, per year and per hour. Use it if: you want to know how much your electricity bill goes up with a server at home. Open the calculator Costs Is it worth self-hosting, or should you pay the subscription? Enter what you pay today, the cost of the hardware, electricity and your time. I tell you which month it pays off and how much you have spent at 12, 24 and 36 months. Use it if: you are thinking of replacing Google Photos, iCloud or Dropbox with Immich or Nextcloud. Open the calculator

How to use them well.

The results are estimates. They come from public data (each model's configuration and each repo's documentation) and simple formulas that we explain on each page. They help you decide whether something makes sense on your machine before downloading several gigabytes; they do not replace a real test.

  • If there is memory to spare, the model or repo should run comfortably.
  • If it is tight, it will work, but with less context or slower, and you should close other apps.
  • If it does not fit, the calculator suggests a smaller version or a bigger machine.

When a repo has a fact sheet, its license and the source of its requirements are there. Before installing anything, go through the 7-step guide.

Frequently asked questions.

  1. How accurate are the calculators?They are estimates. They use each model's published configuration and each repo's official documentation; real speed and power use change with the engine, the driver, the context and whatever else you have open.
  2. What matters most for running an AI model at home?The memory the model fits in (VRAM on a GPU, or unified memory on a Mac) and its bandwidth, which sets how fast it generates text.
  3. Do the calculators save my data?No. Everything is calculated in your browser and nothing is sent to any server; the site uses no cookies or analytics. The values you choose stay in the URL: if you share it, they travel with it. See privacy (in Spanish).
  4. How do I know if a repo is open source?Check its license: only those approved by the Open Source Initiative count as open source. There are source-available repos with restrictions; each fact sheet states the license. Guide to checking repos.