Temperature Converter — °C, °F, K

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Temperature Converter — °C, °F, K

An exact converter between Celsius, Fahrenheit and Kelvin, useful for reading thermometers and international health content. Conversions are pure arithmetic; values are rounded only for display.

Common public-health guidance treats about 38.0 °C (100.4 °F) and above in adults as fever, but thresholds vary with the measurement site (oral, axillary, tympanic) and by age group. Interpretation — especially for infants and young children — belongs with a healthcare professional.

Temperature converter

Convert between Celsius, Fahrenheit and Kelvin, with normal-range context.

Kelvin values (up to 500 K) are accepted.

Nothing you enter is stored. Results are computed on request and discarded.

Methodology & references

°F = (°C × 9/5) + 32; K = °C + 273.15. Body-temperature context uses the commonly cited typical oral range of about 36.1–37.2 °C.

References

Limitations

  • Normal ranges differ by measurement site (oral, axillary, tympanic, rectal).
  • The seek-care notes are general education, not a triage protocol.

How to use this calculator

  • Enter the temperature you want to convert.
  • Choose its current unit (°C, °F or K).
  • Press Calculate to see the value in all three scales.

Understanding your result

The converter itself is arithmetic only. For health interpretation, note that fever definitions and urgency thresholds depend on measurement site, age and clinical context — a professional should interpret readings for infants, young children and people with serious conditions.

Methodology & references

°F = (°C × 9/5) + 32; K = °C + 273.15. Body-temperature context uses the commonly cited typical oral range of about 36.1–37.2 °C.

Limitations

  • Normal ranges differ by measurement site (oral, axillary, tympanic, rectal).
  • The seek-care notes are general education, not a triage protocol.

Frequently asked questions

What temperature counts as a fever?

Common public-health guidance defines fever in adults as about 38.0 °C (100.4 °F) or above, but thresholds vary by measurement site (oral, axillary, tympanic) and age. Contact a healthcare professional for interpretation.

When is a fever an emergency?

Seek urgent care when an infant under three months has any fever, or when fever comes with a stiff neck, confusion, breathing difficulty, or does not settle despite usual care. These are examples, not a complete list — when in doubt, contact emergency services or a doctor.

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