Convert Celsius, Fahrenheit, and Kelvin instantly in your browser — no signup, nothing uploaded.
Why this matters
Temperature scales aren't intuitive. 0°C is 32°F, but 100°C is 212°F — the scales are not linearly related to each other. Most people can't convert in their head, and the formula (°F = °C × 9/5 + 32) is annoying to do for more than one number.
This converter handles Celsius, Fahrenheit, Kelvin, and Rankine instantly. It works both directions and shows the math. Useful for cooking (American recipes use °F), science (Kelvin for absolute temperature), travel (US weather in °F), and HVAC work.
Best uses: converting American recipes to Celsius, reading scientific data in Kelvin, checking weather in foreign units, and HVAC/engineering calculations.
Convert temperature
Type in any field — the other two update live.
How temperature conversion works
Celsius and Fahrenheit share a linear relationship: °F = °C × 9/5 + 32. Kelvin is an absolute scale shifted from Celsius by 273.15, so 0 K is absolute zero. This tool applies those formulas live as you type — useful for recipes, weather apps that mix units, school homework, and lab notes.
India everyday use
Weather in India is usually reported in Celsius. Many imported appliances, US recipes, and older science worksheets still use Fahrenheit. Kelvin shows up in physics and chemistry. Keep this converter open when you need a quick sanity check without hunting for a formula sheet.
Privacy
No values leave your browser. Close the tab and the numbers are gone.
Frequently Asked Questions
Why is Kelvin never negative in normal use?
Kelvin starts at absolute zero (0 K). Negative Kelvin is not used in everyday conversion — if you enter a Kelvin value below 0, the Celsius and Fahrenheit results will still compute mathematically but are not physically meaningful for ordinary temperatures.
Is 37°C exactly body temperature?
It is the commonly cited average. Individual body temperature varies slightly by person, time of day, and measurement method.
