Tools
Calculators that show their work — because a number you can't check is just an opinion with a border around it.
These are free, they run entirely in your browser, and they store nothing. Each one prints every step of its arithmetic so you can verify it with a phone calculator rather than take our word for it.
Running-cost calculators are not here yet. They need rated wattage to compute against, and not one of the chillers we compare publishes one. We would rather leave the slot empty than ship a calculator built on a number we made up. In the meantime the cost pages work the arithmetic through by hand at a rate you choose.