Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin in real time.
Conversions run instantly in your browser — nothing is uploaded or stored.
Convert Between Celsius, Fahrenheit & Kelvin
Temperature doesn't convert with a simple multiplier like most units — each scale has its own zero point, so this tool uses the correct formulas to convert between Celsius, Fahrenheit, and Kelvin. Enter a temperature, choose your units, and get the converted value instantly.
Useful for reading a weather forecast from another country, following a recipe or oven setting written in a different scale, or working through a science assignment.
Frequently Asked Questions
What is the formula to convert Celsius to Fahrenheit?
Fahrenheit equals Celsius multiplied by 9/5, plus 32. The converter applies this automatically.
What temperature is 0 Kelvin?
0 Kelvin is absolute zero, equal to -273.15°C or -459.67°F, the coldest theoretically possible temperature.
Is 100°C always 212°F?
Yes, 100°C (water's boiling point at sea level) converts exactly to 212°F.
Can I enter negative temperatures?
Yes, the converter accepts negative values for Celsius and Fahrenheit as well as values below zero Kelvin, though Kelvin has no negative values in physical reality.
Why does the US use Fahrenheit while most countries use Celsius?
It's largely historical convention; the US retained the Fahrenheit scale for everyday use while most of the world adopted the metric-based Celsius scale.
Is there a temperature where Celsius and Fahrenheit are the same number?
Yes, at -40 degrees the two scales cross: -40°C and -40°F are the same temperature.
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