Temperature Converter
The Temperature Converter converts between Celsius, Fahrenheit, and Kelvin using exact conversion formulas, with a built-in check to prevent temperatures below absolute zero.
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How This Tool Works
Enter a temperature value and choose your source and target scale for an instant conversion.
Formula & Method
°F = °C × 9/5 + 32. °C = (°F − 32) × 5/9. K = °C + 273.15.
Example Calculation
100°C (boiling point of water) converts to 212°F or 373.15 K.
Frequently Asked Questions
What is absolute zero?+
Absolute zero is 0 Kelvin, or -273.15°C, the theoretical lowest possible temperature — the calculator will flag any conversion that falls below this.
Why does Fahrenheit use 32 and 9/5?+
The Fahrenheit scale sets water's freezing point at 32°F and boiling point at 212°F (a 180-degree span), compared to Celsius's 0–100 range, producing the 9/5 ratio and 32-degree offset.
Where is Kelvin commonly used?+
Kelvin is the standard unit in scientific contexts, particularly physics and chemistry, since it has no negative values.
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