Temperature Conversion Table
Free temperature conversion chart and quick reference table for Celsius (°C), Fahrenheit (°F), Kelvin (K), and Rankine (°R). Switch ranges for everyday weather, oven temperatures, and scientific conversions.
Switch ranges to see practical reference points for weather, baking, and lab work.
Temperature conversion chart (values shown for the selected range).
Tap/click any value to copy.
Extreme cold, same temperature in °C and °F
#1Typical home freezer temperature
#2Water freezing point
#3Cool weather
#4Comfortable room temperature
#5Warm summer day
#6Normal human body temperature
#7Very hot summer day
#8Dangerously hot weather
#9Water boiling point (sea level)
#10Built on International StandardsSI (Kelvin) • ISO 80000-5 • Updated 2026 • Engineering Grade
This temperature conversion chart uses exact, widely accepted definitions for Celsius, Fahrenheit, Kelvin, and Rankine. It’s designed for quick reference in recipes, weather reports, and engineering notes, while keeping conversions consistent for scientific work.
Formulas and offsets are verified annually (2026) using authoritative standards so you can reuse the same conversions across spreadsheets, reports, and checklists with consistent rounding.
How the main temperature scales evolved
Temperature Conversion Formulas
From Celsius
To Fahrenheit
°F = (°C × 9/5) + 32
To Kelvin
K = (°C + 273.15)
To Rankine
°R = (°C + 273.15) × 9/5
From Fahrenheit
To Celsius
°C = (°F - 32) × 5/9
To Kelvin
K = (°F - 32) × 5/9 + 273.15
To Rankine
°R = °F + 459.67
How to Use This Temperature Conversion Table: A Step-by-Step Guide
How to Convert Celsius to Fahrenheit Without Calculator
Quick Mental Math Method
- Double the Celsius value
- Add 30
- Adjust slightly (this gives you ±2°F accuracy)
Example: 20°C → (20 × 2) + 30 = 70°F (actual: 68°F)
How to Read the Oven Temperature Conversion Chart
When following international recipes, look up your recipe’s temperature in the °C column, then read the equivalent °F value in the same row.
- Round to the nearest 25°F increment for oven dials (most ovens adjust in 25° steps).
- Use the table as a quick reference temperature chart next to your oven.
- 180°C = 350°F (standard baking)
- 200°C = 400°F (roasting)
- 220°C = 425°F (high heat)
How to Use Kelvin for Scientific Calculations
When to use Kelvin instead of Celsius
- Thermodynamic equations (PV=nRT)
- Material science calculations
- Absolute temperature measurements
- Preventing negative temperature issues
Quick conversion: K = °C + 273.15
Real-World Temperature Conversion Examples: From Kitchen to Laboratory
Perfecting International Baking Recipes
- Used conversion formula: (150 × 9/5) + 32 = 302°F
- Rounded to nearest oven increment: 300°F
- Adjusted baking time by monitoring texture
Weather Forecast Translation for Travelers
- 32 × 2 = 64
- 64 + 30 = 94°F
- Actual: 89.6°F (close enough for packing)
Laboratory Temperature Calibration
- Room temp: 72°F
- Convert to Celsius: (72 − 32) × 5/9 = 22.2°C
- Convert to Kelvin: 22.2 + 273.15 = 295.35 K
Use Cases for Temperature Conversions
Cooking & Baking
Use this celsius fahrenheit conversion table for cooking to translate oven settings in international recipes. Ideal as a temperature conversion table for baking and quick kitchen reference.
Weather & Climate
Translate weather forecasts and climate datasets across regions. Perfect for travelers who need quick celsius to fahrenheit weather conversion.
Scientific Research
Use Kelvin for thermodynamics and lab work where absolute temperature is required. Helpful for scientific temperature conversion calculator workflows and calibration notes.
Industrial Applications
Monitor equipment temperatures for process control, safety thresholds, and global manufacturing handoffs across °C/°F/K references.
Test Your Skills
Challenge yourself with our interactive conversion game!
Fun Facts
Water Freezes
0°C = 32°F = 273.15 K
Body Temperature
37°C = 98.6°F = 310.15 K
Water Boils
100°C = 212°F = 373.15 K
Sun Surface
5,778 K = 5,505°C = 9,941°F
❓Temperature Conversion FAQ
How to convert Celsius to Fahrenheit without a calculator?
Use the “double and add 30” trick: multiply Celsius by 2, then add 30. Example: 20°C → (20 × 2) + 30 = 70°F (actual: 68°F). For precision, use (°C × 9/5) + 32.
What temperature does water boil in Fahrenheit and Celsius?
Water boils at 100°C (212°F) at sea level under standard atmospheric pressure. At higher altitudes, boiling point decreases—roughly 1°C per 300 meters elevation gain.
How do you convert oven temperature from Celsius to Fahrenheit for baking?
Use (°C × 9/5) + 32. Common baking conversions: 160°C = 320°F (low), 180°C = 350°F (moderate), 200°C = 400°F (hot), 220°C = 425°F (very hot). Round to your oven’s nearest 25°F increment.
Why is -40 degrees the same in Celsius and Fahrenheit?
-40°C and -40°F are the intersection point where both scales meet. It occurs when you solve the conversion equation (°C × 9/5) + 32 = °C for the point where °C = °F.
What is 100 degrees Celsius in Fahrenheit for cooking?
100°C equals 212°F—the boiling point of water at sea level. In cooking, this temperature is used for simmering liquids, blanching vegetables, steaming foods, and early candy-making stages.
How to convert temperature difference (delta T) vs absolute temperature?
For temperature changes (ΔT), skip the offset: Δ°F = Δ°C × 9/5 (no +32). For absolute temperatures, use the full formula: °F = (°C × 9/5) + 32.
When should I use Kelvin instead of Celsius in calculations?
Use Kelvin for thermodynamic equations (gas laws), temperature ratios, avoiding negative temperatures in formulas, and scientific reporting (SI standard). Convert: K = °C + 273.15.
What is normal body temperature in Celsius and Fahrenheit?
A common reference is 37°C (98.6°F) orally, but normal ranges vary (about 36.1–37.2°C / 97–99°F). Fever typically starts around 38°C (100.4°F).
How to use a printable temperature conversion chart for recipes?
Print the common range (-40°C to 250°C), laminate it for kitchen durability, look up the °C value in your recipe, read the matching °F in the same row, and keep it near your oven for quick reference.
What is the difference between Kelvin and Celsius scale?
Kelvin starts at absolute zero (-273.15°C), uses the same interval size as Celsius (1 K = 1°C change), and relates by K = °C + 273.15. Kelvin is used for science; Celsius is common in daily life.
How hot is 25 degrees Celsius in Fahrenheit (room temperature)?
25°C = 77°F, often considered a warm room temperature. Reference points: 20°C = 68°F (cool room), 22°C = 72°F (typical office), 25°C = 77°F (warm comfort), 28°C = 82°F (getting hot).
Can I use the same conversion for Celsius to Kelvin and Fahrenheit?
No. Celsius to Kelvin is simple addition: K = °C + 273.15. Celsius to Fahrenheit needs multiply + offset: °F = (°C × 9/5) + 32.
What temperature should I set my oven for 180 Celsius recipes?
180°C = 350°F, the most common baking temperature. Set your oven to 350°F (or the nearest setting your oven supports).