🌤️Weather & Climate Applications
International Weather Reports
European Weather to US
Munich forecast: High 28°C, Low 15°C
High:
Low:
US equivalent: High 82°F, Low 59°F
US Weather to Celsius
Phoenix forecast: High 115°F, Low 85°F
High:
Low:
Metric equivalent: High 46°C, Low 29°C
Comfort Zones & HVAC
Comfortable Range
68-72°F
20-22°C
Energy Saving
78°F (Summer)
25.6°C
Winter Setting
68°F
20°C
🍳Cooking & Food Safety
Safe Internal Temperatures
Poultry
165°F = 74°C
Ground Beef
160°F = 71°C
Whole Cuts Beef
145°F = 63°C
Pork
145°F = 63°C
Fish
145°F = 63°C
Eggs
160°F = 71°C
Baking Temperature Guide
International Recipe Conversion
European recipe: "Bake at 180°C"
US oven: Set to 350-360°F
Common Oven Settings
Low: 300°F (150°C)
Moderate: 350°F (175°C)
Medium-high: 400°F (200°C)
Hot: 450°F (230°C)
Very hot: 500°F (260°C)
🔬Scientific & Industrial Applications
Laboratory Measurements
Chemical Reaction Conditions
Lab protocol requires 298 K
Room temperature: ~25°C or 77°F
Cryogenic Storage
Liquid nitrogen: 77 K
Extremely cold: -196°C or -321°F
Manufacturing & Quality Control
Metal Heat Treatment
Steel tempering: 400-600°C
Low end:
High end:
Range: 752-1112°F
Plastic Molding
Process temperature: 350°F
Process: 177°C
❌Common Temperature Conversion Mistakes
Mistake #1: Forgetting the +32 or -32
Wrong: 20°C = 20 × 9/5 = 36°F
Right: 20°C = (20 × 9/5) + 32 = 68°F
Always remember the offset! Fahrenheit zero is not the same as Celsius zero.
Mistake #2: Wrong Order of Operations
Wrong: 100°F = 100 - 32 × 5/9 = 82.2°C
Right: 100°F = (100 - 32) × 5/9 = 37.8°C
Use parentheses! Subtract 32 FIRST, then multiply by 5/9.
Mistake #3: Using Wrong Kelvin Offset
Wrong: 25°C = 25 + 273 = 298 K
Right: 25°C = 25 + 273.15 = 298.15 K
Kelvin offset is 273.15, not just 273. The .15 matters for precision!
🧠Quick Mental Conversion Tricks
Celsius to Fahrenheit (Easy)
Step 1: Double the Celsius
Step 2: Subtract 10% of doubled value
Step 3: Add 32
Example: 20°C → (20×2) - (40×0.1) + 32 → 40 - 4 + 32 = 68°F
Key Reference Points
0°C = 32°F (Water freezes)
10°C = 50°F (Cool day)
20°C = 68°F (Room temperature)
30°C = 86°F (Hot day)
40°C = 104°F (Very hot)
Fahrenheit to Celsius (Easy)
Step 1: Subtract 32
Step 2: Cut in half
Step 3: Subtract 10% of half
Example: 68°F → (68-32) ÷ 2 - (18×0.1) → 18 - 1.8 ≈ 16°C (exact: 20°C)
Temperature Estimation
Negative temps: Very cold = below 0°C/32°F
Comfortable: 15-25°C = 60-75°F
Hot: 35°C+ = 95°F+
Body temp: ~37°C = ~98.6°F