Fever Temperature Chart Guide
Quick reference guide for Celsius to Fahrenheit fever temperatures with medical recommendations
What Temperature Is Considered a Fever?
A body temperature of 38.0°C (100.4°F) or higher is generally considered a fever for adults and children. Temperatures between 37.6°C and 37.9°C are often classified as a low-grade or slight fever.
Quick Temperature Converter
Convert between Celsius and Fahrenheit for any temperature value:
Fever Temperature Levels
Reference chart showing different fever levels with Celsius to Fahrenheit conversions and medical advice:
✅ Normal Temperature
Healthy body temperature range. No medical intervention needed.
- Maintain normal activities
- Stay hydrated
- Monitor for changes
⚠️ Slightly Elevated
Borderline temperature. May indicate early illness.
- Monitor symptoms
- Increase fluid intake
- Rest if feeling unwell
🌡️ Low-Grade Fever
Official fever threshold. Body is fighting infection.
- Rest and hydrate
- Consider fever reducers
- Monitor closely
🔥 Moderate Fever
Significant fever requiring attention.
- Seek medical advice
- Use fever medication
- Monitor for worsening
🚨 High Fever
Potentially dangerous fever level.
- Seek medical care
- Emergency for children
- Immediate treatment needed
💀 Dangerous Hyperpyrexia
Medical emergency requiring immediate attention.
- Call emergency services
- Cooling measures
- Hospitalization likely
Age-Specific Fever Guidelines
👶 Infants (0-3 months)
Fever threshold: Any temperature ≥38.0°C (100.4°F) requires immediate medical attention.
- Rectal temperature is most accurate
- Even low-grade fever can be serious
- Contact pediatrician immediately
🧒 Children (3 months - 12 years)
Fever threshold: ≥38.0°C (100.4°F) - monitor closely and consult doctor if concerned.
- Watch for behavior changes
- Use age-appropriate medication
- Seek care if fever >39.0°C (102.2°F)
👨⚕️ Adults (12+ years)
Fever threshold: ≥38.0°C (100.4°F) - usually manageable at home unless severe.
- Rest and hydration usually sufficient
- Seek care if fever >39.4°C (103°F) or lasts >3 days
- Watch for concerning symptoms
Temperature Measurement Methods
Different methods yield slightly different results. Here's what you need to know:
Oral
Normal range: 36.5-37.5°C
Wait 30 minutes after eating/drinking for accurate reading.
Ear (Tympanic)
Normal range: 35.8-38.0°C
Quick and convenient but can be affected by earwax.
Forehead (Temporal)
Normal range: 35.8-37.8°C
Good for screening but less accurate than other methods.
Axillary (Armpit)
Normal range: 35.9-36.7°C
Least accurate method, typically 0.5-1.0°C lower than core temperature.
Download Printable Fever Temperature Chart
Get our comprehensive one-page PDF reference guide for quick access at home or medical facility.
📄Download PDF ChartPDF includes: Fever temperature ranges, conversion chart, age-specific guidelines, and emergency contacts.
Important Medical Disclaimer
Disclaimer: This fever temperature chart is for educational purposes only and should not replace professional medical advice, diagnosis, or treatment. Always consult with a healthcare provider for medical concerns, especially for infants, young children, or individuals with compromised immune systems.