728 × 90 Leaderboard

320 × 100 Mobile Banner

Temperature Converter

Convert between Fahrenheit, Celsius, and Kelvin instantly.

Last updated: June 13, 2026

Calculator

Temperature

From

Results

Fahrenheit72.00 °F

Celsius22.22 °C

Kelvin295.37 K

How to Use This Calculator

1Enter the temperature value.
2Select the unit you are converting from.
3View all three temperature scales at once.

Formula Explanation

Temperature scales can be converted using simple linear formulas. Fahrenheit and Celsius intersect at -40°.

°F to °C: (°F - 32) × 5/9 °C to °F: (°C × 9/5) + 32 °C to K: °C + 273.15 K to °C: K - 273.15

Variables:

°FFahrenheit — used in the US

°CCelsius — used worldwide

KKelvin — absolute temperature scale used in science

Worked Examples

72°F to Celsius

1. (72 - 32) × 5/9
2. 40 × 0.5556
3. = 22.22°C

Result: 72°F = 22.22°C = 295.37 K

100°C to Fahrenheit

1. 100 × 9/5 + 32
2. 180 + 32 = 212

Result: 100°C = 212°F (boiling point of water)

Why Use This Calculator

Convert between all three major temperature scales.
Shows all conversions simultaneously.
Useful for cooking, science, weather, and travel.
Handles negative temperatures correctly.

336 × 280 Large Rectangle

300 × 250 Medium Rectangle

Tips & Best Practices

Key reference points: Water freezes at 32°F/0°C/273.15K and boils at 212°F/100°C/373.15K.
Room temperature is approximately 72°F / 22°C / 295K.
Fahrenheit and Celsius are equal at -40° — the only point where both scales match.
Kelvin cannot be negative — 0K is absolute zero (-459.67°F / -273.15°C).

Common Mistakes to Avoid

❌ Forgetting to subtract 32 before multiplying when converting F to C.

✅ The formula is (°F - 32) × 5/9. Subtract 32 FIRST, then multiply. Common error: 72 × 5/9 - 32 = wrong.

❌ Using Kelvin with a degree symbol.

✅ Kelvin does not use a degree symbol. Write "300 K" not "300°K". It is an absolute scale.

Frequently Asked Questions

What is absolute zero?

Absolute zero is 0 Kelvin (-273.15°C / -459.67°F). It is the lowest possible temperature where all molecular motion theoretically stops. It has never been reached in a laboratory.

Why does the US use Fahrenheit?

The US adopted Fahrenheit in the colonial era. Most other countries switched to Celsius during metrication in the 1960s-70s. Fahrenheit offers more precision for everyday weather temperatures without decimals.

336 × 280 Large Rectangle

300 × 250 Medium Rectangle

Embed This Calculator

Add the Temperature Converter to your website for free. Copy the code below and paste it into your HTML.

Width

Height

<iframe src="https://redicalc.com/embed/math/temperature-converter" width="100%" height="600" style="border:none;border-radius:12px;box-shadow:0 1px 3px rgba(0,0,0,0.1);" title="Temperature Converter — RediCalc.com" loading="lazy" allowtransparency="true"></iframe>

Preview embedFree to use · Attribution link included

Disclaimer: This calculator is provided for informational and educational purposes only. Results are estimates and should not be used as a substitute for professional advice. RediCalc.com makes no guarantees regarding the accuracy, completeness, or suitability of any calculations. Always consult a qualified professional before making financial, health, construction, or other important decisions.

160 × 600Skyscraper