Temperature Converter

Convert temperatures between Celsius, Fahrenheit, and Kelvin instantly. Free online temperature conversion calculator.

Last updated: June 1, 2026

From

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Value (°C)

Result (°F)

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What is Temperature Converter?

A temperature converter translates values between Celsius (°C), Fahrenheit (°F), and Kelvin (K) — the three temperature scales used worldwide. Celsius is the global scientific and everyday standard, Fahrenheit is used in the United States for weather and cooking, and Kelvin is the SI unit used in physics, chemistry, and engineering (where 0K is absolute zero). This tool handles the non-linear conversion formulas instantly, eliminating the mental math that's notoriously easy to get wrong.

How It Works

The tool applies the standard conversion formulas: Celsius to Fahrenheit: °F = (°C × 9/5) + 32. Fahrenheit to Celsius: °C = (°F - 32) × 5/9. Celsius to Kelvin: K = °C + 273.15. The conversion updates in real-time as you type, and shows the result with appropriate decimal precision. It handles negative temperatures correctly (important for Celsius/Fahrenheit where scales cross at -40°) and prevents invalid Kelvin values (can't go below 0K).

Examples

Celsius to Fahrenheit

Input

100°C

Output

212°F

Fahrenheit to Celsius

Input

72°F

Output

22.22°C

Tips & Best Practices

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Celsius and Fahrenheit scales cross at exactly -40° — it's the same temperature in both systems.

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Room temperature is approximately 20-22°C (68-72°F). Body temperature is 37°C (98.6°F).

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Absolute zero (0K = -273.15°C = -459.67°F) is the lowest theoretically possible temperature.

Quick Reference

Description	Celsius	Fahrenheit	Kelvin
Absolute zero	-273.15°C	-459.67°F	0 K
Water freezes	0°C	32°F	273.15 K
Room temperature	20°C	68°F	293.15 K
Body temperature	37°C	98.6°F	310.15 K
Water boils	100°C	212°F	373.15 K

Common Use Cases

•Converting weather temperatures between Celsius and Fahrenheit for international travelers
•Translating cooking temperatures between Fahrenheit (US recipes) and Celsius (international ovens)
•Converting scientific temperature measurements between Kelvin and Celsius for lab work
•Understanding temperature specifications in product datasheets using different scales
•Converting body temperature readings between scales for medical reference
•Translating HVAC and thermostat settings when working with equipment using different scales