Celsius to Fahrenheit Converter
Instantly convert Celsius to Fahrenheit (°C to °F) and back. Also supports Kelvin and Rankine. Free, accurate, and 100% private — no signup, no uploads.
All conversions happen locally in your browser. No data is sent to any server. No signup, no tracking, no storage.
Convert Celsius to Fahrenheit Instantly
Our Celsius to Fahrenheit converter is the simplest way to convert temperature from °C to °F. Whether you're checking the weather, cooking, or doing science homework, this tool gives you instant, accurate results. It also supports reverse conversion (Fahrenheit to Celsius) and the scientific scales Kelvin and Rankine — all in one place.
Optimized for the °C → °F conversion, with clear results and formula display.
Convert from any scale to any other. See all four results at once.
Uses the standard formula: °F = (°C × 9/5) + 32, with 4‑decimal precision.
All calculations run locally in your browser — no uploads, no servers.
Use the tool instantly. No registration, no email, no payment.
Responsive design works on desktop, tablet, and mobile.
How to Convert Celsius to Fahrenheit
1. Make sure "Celsius (°C)" is selected in the "From" dropdown.
2. Enter the temperature in Celsius.
3. The Fahrenheit value will appear instantly in the results panel.
4. You can also reverse the conversion by selecting Fahrenheit in "From" and Celsius in "To".
Formula: °F = (°C × 9/5) + 32
For example: 25°C × 9/5 + 32 = 77°F.
Complete Temperature Conversion Formulas
Celsius (°C)
- To Fahrenheit: (°C × 9/5) + 32 = °F
- To Kelvin: °C + 273.15 = K
- To Rankine: (°C + 273.15) × 9/5 = °R
Fahrenheit (°F)
- To Celsius: (°F − 32) × 5/9 = °C
- To Kelvin: (°F − 32) × 5/9 + 273.15 = K
- To Rankine: °F + 459.67 = °R
Kelvin (K)
- To Celsius: K − 273.15 = °C
- To Fahrenheit: (K − 273.15) × 9/5 + 32 = °F
- To Rankine: K × 9/5 = °R
Rankine (°R)
- To Celsius: (°R − 491.67) × 5/9 = °C
- To Fahrenheit: °R − 459.67 = °F
- To Kelvin: °R × 5/9 = K
Frequently Asked Questions
Learn how to use this tool correctly by reading our step-by-step tutorial.
