Temperature Converter
Reference Points
| Reference | °C | °F | K |
|---|---|---|---|
| Absolute Zero | -273.15 | -459.67 | 0 |
| Water Freezes | 0 | 32 | 273.15 |
| Body Temp | 37 | 98.6 | 310.15 |
| Water Boils | 100 | 212 | 373.15 |
About Temperature Converter
What Is a Temperature Converter?
A temperature converter transforms temperature readings between different scales. The three most common scales are Celsius (used worldwide for everyday temperatures), Fahrenheit (used in the United States), and Kelvin (used in science). Unlike other unit conversions that use simple multiplication, temperature conversion requires both multiplication and addition because the scales have different zero points and different degree sizes.
Temperature Conversion Formulas
The key formulas are: C to F: F = (C x 9/5) + 32. F to C: C = (F - 32) x 5/9. C to K: K = C + 273.15. K to C: C = K - 273.15. Notable reference points: water freezes at 0C / 32F / 273.15K and boils at 100C / 212F / 373.15K. Normal body temperature is 37C / 98.6F / 310.15K.
How to Use This Converter
Enter a temperature value and select the source scale. Click Convert to see the equivalent temperature in all three scales simultaneously. The converter also shows common reference point comparisons.
Frequently Asked Questions
At what temperature are Celsius and Fahrenheit equal?
Celsius and Fahrenheit are equal at -40 degrees. This is the only point where both scales intersect: -40C = -40F.
What is absolute zero?
Absolute zero is 0 Kelvin, -273.15C, or -459.67F. It is the theoretical lowest possible temperature where molecular motion stops. It has never been fully achieved in practice.
Why does the US use Fahrenheit?
The Fahrenheit scale was developed by Daniel Gabriel Fahrenheit in 1724 and was widely adopted before the Celsius scale was created. The US retained it due to established infrastructure, industry standards, and public familiarity.
