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Celsius to Fahrenheit (°C to °F) Converter

Convert between Celsius and Fahrenheit temperature scales with precise conversion formulas. Essential for international patient care and fever assessment.

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How Temperature Conversion Works

Celsius and Fahrenheit are two different scales for measuring temperature. Both define fixed reference points (freezing and boiling points of water), but at different numerical values. This creates a linear relationship between the two scales with both a slope (9/5 or 1.8) and an intercept (32). Understanding this relationship is crucial for international healthcare where patients and medical literature may use either scale.

Formulas

°C → °F: °F = (°C × 9/5) + 32
°F → °C: °C = (°F - 32) × 5/9

Worked Examples

Example 1: Convert 37°C to °F (normal body temperature)

1

°F = (37 × 9/5) + 32

2

°F = 66.6 + 32 = 98.6

Answer: 98.6°F

Example 2: Convert 38.5°C to °F (high fever threshold)

1

°F = (38.5 × 9/5) + 32

2

°F = 69.3 + 32 = 101.3

Answer: 101.3°F

Example 3: Convert 104°F to °C (high fever in Fahrenheit)

1

°C = (104 - 32) × 5/9

2

°C = 72 × 5/9 = 40

Answer: 40°C

When This Converter Is Used

  • •Assessing and interpreting patient body temperatures in international settings
  • •Converting medication storage temperature requirements from one scale to another
  • •Communicating patient temperatures across countries or healthcare systems

Clinical safety note: Always verify the temperature scale your thermometer uses before interpreting results. When communicating temperatures across systems, always specify the scale (°C or °F) to prevent misunderstandings.

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Body Surface Area

Frequently Asked Questions

Clinical reminder: Always follow local protocols and consult medication information sheets. These examples are for calculation practice only.

References & Sources

These sources establish temperature scale standards and clinical fever definitions used in healthcare.

International

BIPM — International Temperature Scale Standards

International standards for Celsius and Fahrenheit temperature scales.

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United Kingdom

NICE — Fever Management Clinical Guidelines

UK clinical guidelines for fever assessment and management in children and adults.

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Australia

National Measurement Institute Australia

Australian standards for temperature measurement and conversion.

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