What is a Temperature Converter?
Recipes in Fahrenheit, science in Kelvin, weather in Celsius: conversion is constant low-grade friction.
Type once, read all three scales, live.
The reference points worth memorising: water freezes at 0 °C / 32 °F and boils at 100 °C / 212 °F, normal body temperature is 37 °C / 98.6 °F exactly, 40 °C on an Indian summer afternoon is 104 °F, and absolute zero is 0 K, which is −273.15 °C and −459.67 °F. Those four cover most of the conversions anyone does in their head.
Frequently asked questions
What is 180 °C in Fahrenheit for baking?
Exactly 356 °F, which recipes round to 350 °F. The usual oven steps are all rounded the same way: 160 °C / 325 °F, 180 °C / 350 °F, 200 °C / 400 °F and 220 °C / 425 °F. The few degrees lost in the rounding matter for sugar work and almost nothing else.
Why is there a 9/5 in the Fahrenheit formula?
Because the two scales cut the same span into different numbers of steps. Between freezing and boiling, Fahrenheit has 180 degrees (32 to 212) where Celsius has 100, and 180 ÷ 100 is 9/5. The +32 is just the offset between the two zero points.
What are the formulas?
°F = °C × 9/5 + 32; K = °C + 273.15.
Where do the scales cross?
−40 is the same in Celsius and Fahrenheit: the classic party fact.
Why can’t Kelvin be negative?
Kelvin starts at absolute zero, the coldest possible temperature: 0 K = −273.15 °C.
Quick mental approximation?
°C ≈ (°F − 30) ÷ 2 gets you close for weather temperatures.