Temperature Converter

Convert between Celsius (°C), Fahrenheit (°F), and Kelvin (K) temperature units.

Convert from Celsius to another temperature unit

Temperature Value

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Precision:

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Quick Conversion Table

Common temperature references for quick lookup

Description	Celsius (°C)	Fahrenheit (°F)	Kelvin (K)
Absolute Zero	-273.15	-459.67	0
Liquid Nitrogen	-196	-320.8	77.15
Dry Ice (Solid CO₂)	-78.5	-109.3	194.65
Very Cold Winter Day	-40	-40	233.15
Freezer Temperature	-18	0	255.15
Cold Winter Day	-10	14	263.15
Water Freezes	0	32	273.15
Cool Day	10	50	283.15
Room Temperature	20	68	293.15
Comfortable Room	22	72	295.15
Warm Day	25	77	298.15
Hot Summer Day	30	86	303.15
Very Hot Day	35	95	308.15
Human Body Temperature	37	98.6	310.15
Extremely Hot Day	40	104	313.15
Death Valley Record	54	129	327.15
Hot Coffee	60	140	333.15
Hot Bath	40-45	104-113	313-318
Sauna	70-100	158-212	343-373
Water Boils	100	212	373.15
Oven - Low Heat	150	300	423.15
Oven - Medium Heat	180	350	453.15
Oven - High Heat	220	425	493.15
Pizza Oven	250-300	480-570	523-573
Paper Burns	233	451	506.15
Lead Melts	327	621	600.15
Aluminum Melts	660	1220	933.15
Copper Melts	1085	1985	1358.15
Gold Melts	1064	1947	1337.15
Iron Melts	1538	2800	1811.15
Sun's Surface	5500	9932	5773.15

💡 Tip: The highlighted rows show key reference points - absolute zero, water's phase changes, body temperature, and the sun's surface temperature.

Master Temperature Conversions with Step-by-Step Math

Learn step-by-step how to convert between different temperature scales with practical examples from science, cooking, and everyday life

1. Celsius to Fahrenheit Conversion

For Fraction Users

°F = (°C × 9/5) + 32

Example: 25°C → (25 × 9/5) + 32 = 45 + 32 = 77°F

For Decimal Users

°F = (°C × 1.8) + 32

Example: 25°C → (25 × 1.8) + 32 = 45 + 32 = 77°F

Key Factor: 9/5 = 1.8 (Fahrenheit degrees are smaller)

The +32 adjusts for different zero points (0°C = 32°F)

Purpose:

Convert from the scientific Celsius scale to Fahrenheit.
“What is 25°C in Fahrenheit?”

Benefits:

Essential for cooking, weather understanding, and international communication when working with US measurements.

Steps:

1. Multiply Celsius temperature by 9/5 (or 1.8)
2. Add 32 to account for the different freezing point
3. Add °F unit to your result

Fraction Method: 25°C to Fahrenheit

Step 1: 25 × 9/5 = 45

Step 2: 45 + 32 = 77

Result: 77°F

Decimal Method: 25°C to Fahrenheit

Step 1: 25 × 1.8 = 45

Step 2: 45 + 32 = 77

Result: 77°F

Result:

25°C = 77°F (a nice warm day)

Example:

“The weather forecast shows 25°C. That's 77°F - perfect for outdoor activities!”

2. Fahrenheit to Celsius Conversion

For Fraction Users

°C = (°F - 32) × 5/9

Example: 77°F → (77 - 32) × 5/9 = 45 × 5/9 = 25°C

For Decimal Users

°C = (°F - 32) ÷ 1.8

Example: 77°F → (77 - 32) ÷ 1.8 = 45 ÷ 1.8 = 25°C

Key Factor: 5/9 ≈ 0.556 (inverse of 9/5)

Subtract 32 first to remove the offset, then scale down

Purpose:

Convert from Fahrenheit to the scientific Celsius scale.
“What is 77°F in Celsius?”

Benefits:

Essential for scientific work, international travel, and understanding global weather reports.

Steps:

1. Subtract 32 from the Fahrenheit temperature
2. Multiply the result by 5/9 (or divide by 1.8)
3. Add °C unit to your result

Fraction Method: 77°F to Celsius

Step 1: 77 - 32 = 45

Step 2: 45 × 5/9 = 25

Result: 25°C

Decimal Method: 77°F to Celsius

Step 1: 77 - 32 = 45

Step 2: 45 ÷ 1.8 = 25

Result: 25°C

Result:

77°F = 25°C (room temperature)

Example:

“The thermostat shows 77°F. That's 25°C - a comfortable indoor temperature.”

3. Celsius to Kelvin Conversion

Temperature Conversion = °C + 273.15

Example: 100°C → 100 + 273.15 = 373.15K

Key Point: Simple addition (same degree size)

Kelvin uses the same degree intervals as Celsius, just shifted to absolute zero

Purpose:

Essential for scientific calculations where absolute temperature matters.
“What is 100°C in Kelvin?”

Benefits:

Critical for physics, chemistry, and engineering calculations. Kelvin scale starts at absolute zero, making thermodynamic calculations possible.

Steps:

1. Simply add 273.15 to the Celsius temperature
2. Add K unit to your result
3. Verify result is positive (Kelvin cannot be negative)

Example: Convert the boiling point of water (100°C)

Calculation: 100 + 273.15 = 373.15

Result: 373.15K

Result:

100°C = 373.15K (water's boiling point in absolute temperature)

Example:

“In the lab, water boils at 100°C, which equals 373.15K - the standard reference point for scientific calculations.”

Tips & Best Practices for Temperature Conversions

Memory Aid: 0°C = 32°F, 100°C = 212°F

Use these reference points to check if your conversion seems reasonable

Quick Check: Room temperature ≈ 20°C ≈ 68°F ≈ 293K

Use this common reference to verify your calculations

Essential Tips:

• Remember: Kelvin never negative
• Use parentheses in complex calculations
• Round to appropriate significant figures
• Know your local temperature scale
• Practice with familiar temperatures

Best Practices:

• Use dimensional analysis for accuracy
• Learn approximate mental conversion tricks
• Understand temperature differences vs absolute values
• Know when precision matters most
• Practice with extreme temperatures

Real-Life Applications:

• Weather forecasting and reporting
• Cooking and baking (oven temperatures)
• Scientific research and experiments
• Medical and health applications
• Industrial and engineering processes

Watch Out For:

• Using the wrong formula direction
• Forgetting to add/subtract 32 for F↔C
• Negative Kelvin values (impossible)
• Rounding too early in calculations
• Mixing up multiplication and division