Talking about the weather with someone in the US, setting an American oven or air fryer, following a US recipe or reading a thermometer set to Fahrenheit all require converting Celsius to Fahrenheit. The two scales differ in both step size and starting point, so a single multiplier is not enough.
Formula: °F = °C × 1.8 + 32. Example: 25 °C = 77 °F. Table values are rounded to two decimal places (one for temperatures); use the converter above for more precision.
Double the Celsius and add 30 for a quick estimate: 25 °C is about 80 °F (exactly 77 °F). It is only a few degrees off around room temperature but drifts further as temperatures rise, so use the exact formula for baking. Handy anchors: 0 °C = 32 °F, 20 °C = 68 °F, 37 °C = 98.6 °F, 100 °C = 212 °F.
