Temperature Converter – °C, °F, K, Rankine & 5+ Scales

A temperature converter instantly transforms readings between Celsius, Fahrenheit, Kelvin, and other scales. Essential for cooking (recipes use different scales), weather (USA uses °F, most countries use °C), medical checks (fever thresholds differ), and engineering (scientific work uses Kelvin).

Formula: °F = (°C × 9/5) + 32. Example: 25°C = 77°F. For quick mental math: multiply °C by 2, add 30 (close approximation: 25 × 2 + 30 = 80). Exact converter: 25 × 1.8 + 32 = 77°F.

Formula: °C = (°F − 32) × 5/9. Example: 98.6°F = 37°C (exact body temperature). Quick: (°F − 32) ÷ 2 ≈ °C (rough estimate). Exact: (98.6 − 32) × 5/9 = 37°C.

Celsius: 0°C = freezing, 100°C = boiling (used globally except USA). Fahrenheit: 32°F = freezing, 212°F = boiling (USA standard). Celsius intervals are larger: 1°C rise = 1.8°F rise. At -40°, both scales equal.

Formula: K = °C + 273.15. Example: 0°C = 273.15 K, 25°C = 298.15 K. Kelvin = absolute scale (starts at zero, never negative). Used in science, physics, engineering, thermodynamics.

Two-step: Convert °F to °C first: °C = (°F − 32) × 5/9, then °C to K: K = °C + 273.15. Example: 68°F = 20°C = 293.15 K. Direct formula: K = (°F − 32) × 5/9 + 273.15.

98.6°F = exactly 37°C. This is normal human body temperature. Fever threshold: above 38°C (100.4°F). Used for medical temperature checks, fever assessments, thermometer readings globally.

37°C = 98.6°F. This is standard human body temperature reference. Medical professionals use: Normal (36.1–37.2°C), Fever (>38°C), Hypothermia (<35°C). Converter handles precise clinical comparisons.

Boiling point: 100°C = 212°F (at sea level, standard pressure). Cooking temperatures depend on altitude: higher elevation = lower boiling point (Denver: ~95°C at 1 mile elevation). Use converter for recipe adjustments.

Freezing point: 0°C = 32°F (at sea level). Ice formation starts at or below 32°F (0°C). Winter weather thresholds: 0°C = dangerous driving (ice risk). Converter helps weather planning.

Kelvin is the SI standard absolute temperature scale used in science. Key difference: Kelvin has no negative values (starts at 0 K = absolute zero). Celsius = relative scale (arbitrary freezing point). Thermodynamics, gas laws, and physics require Kelvin.

Room temperature: 20–22°C = 68–72°F. Comfort zone: 21–23°C (70–73°F). HVAC standards: 21°C ± 2°C. Converter helps set thermostats correctly for comfort vs. Energy savings.

Normal body temp: 36.1–37.2°C (97°F–99°F). Fever: >38°C (>100.4°F). High fever: >39°C (>102.2°F). Converter confirms readings: If thermometer shows 101°F, converter shows 38.3°C = moderate fever, call doctor.

Common conversions: 350°F = 175°C (baking), 375°F = 190°C (roasting), 400°F = 200°C (pizza), 425°F = 220°C (broiling). Use converter for precise matches. Ovens vary: convert & verify with thermometer.

Historical: Fahrenheit developed earlier (1724) in Europe, adopted by USA. Most world switched to Celsius in 1970s–1980s for SI standardization. USA kept Fahrenheit for weather, cooking, medicine. Converter bridges the gap for global communication.

Yes for standard conditions. Formulas match NIST/ISO standards. Accurate for cooking, weather, medical, general engineering. For ultra-precision labs (nanosecond-level thermal measurement, absolute zero experiments), consult specialized tools.

Yes, universal conversion. India/UK/Australia use °C; USA uses °F. Converter instantly compares: 30°C = 86°F (hot day India), 0°C = 32°F (snow UK). Essential for travel, immigration, cross-border weather alerts.