Temperature converter: °C ⇄ °F ⇄ K
A temperature converter tuned for cooling shoppers: instant °C, °F and Kelvin conversion, plus the comfort reference points that turn spec-sheet claims into “will I actually feel this?”.
Exact formulas: °F = °C × 9/5 + 32 · K = °C + 273.15.
Comfort reference points
| 18–22°C / 64–72°F | Typical sleep-comfort band |
|---|---|
| 23–26°C / 73–79°F | Daytime comfort band in most standards |
| +4–10°C drop | Evaporative outlet-air claims, best case in dry air |
| 10–12°C drop | Coolzy-class refrigerated stream vs room air (stated) |
Sizing a room instead of a stream? That is the BTU calculator’s job.
Why cooling specs mix both scales
This category is sold across markets that never agreed on a unit, so a single product page routinely carries both. The American offers we cover state a target of 60 °F and a heating ceiling of 86 °F; the German and French pages for the same class of device talk about 16 °C and 30 °C. Those are the same numbers wearing different clothes, and converting them is the only way to compare two offers honestly.
Watch the difference between a temperature and a temperature difference, because they convert differently. A room at 30 °C is 86 °F, but a drop of 30 °C is a drop of 54 °F — the 32-degree offset applies to the reading, not to the gap. Marketing copy mixes the two often enough that it is worth checking which one a claim means before comparing it with another.
What a claimed drop is measured against
Almost every temperature claim in personal cooling describes the air leaving the unit, not the room. A stream that comes out 8 °C cooler than the air going in is a real and useful thing at arm’s length; it is not the same statement as “this lowers your room by 8 °C”, which would require moving heat out of the room entirely.
The ceiling on any evaporative drop is the wet-bulb temperature, which rises with humidity. Converting a claim into your own scale is step one; checking it against the humidity where you live is step two.
Frequently asked questions
What formulas does the temperature converter use?
The exact ones: °F = °C × 9/5 + 32; K = °C + 273.15. This temperature converter applies them instantly in both directions with no rounding tricks.
What indoor temperature counts as comfortable?
Most standards put summer comfort around 23–26°C (73–79°F) and sleep comfort a notch cooler, ~18–22°C (64–72°F) — the targets worth sizing equipment against.
How much can an evaporative cooler lower air temperature?
Claims in the class run 4–10°C (7–18°F) of outlet-air drop, entirely humidity-dependent — dry air delivers the top of that range, muggy air almost none. Context in our explainer.