Formats, units, and options for Temperature Converter
Temperature Converter is a calculator tool — it works with numbers you type in, not uploaded files. Knowing the supported scales and how conversions are calculated makes your workflow smoother.
Supported scales (5 total)
- Celsius (°C) — the SI derived unit, water freezes at 0 °C and boils at 100 °C
- Fahrenheit (°F) — Imperial scale, water freezes at 32 °F and boils at 212 °F
- Kelvin (K) — absolute scale, 0 K is absolute zero; water boils at 373.15 K
Additional supported scales:
- Réaumur (°Ré) — historical scale, 0 °Ré = freezing, 80 °Ré = boiling of water
- Rankine (°R) — absolute Fahrenheit scale, 0 °R = absolute zero
Conversion formulas
The tool uses the correct linear formula for each pair, with built-in offset handling:
- °F = °C × 9/5 + 32
- °C = (°F - 32) × 5/9
- K = °C + 273.15
- °C = K - 273.15
- °Ré = °C × 4/5
- °R = (°C + 273.15) × 9/5
Because these formulas include constants (the +32, the +273.15), the tool's offset handling ensures they are applied correctly — not missed as a pure ratio would.
Options and accuracy
Results are shown with appropriate decimal precision (up to 10 significant figures where needed). The tool accepts negative numbers and zero, which are meaningful in temperature conversion — for example, -40 °C equals -40 °F, and -273.15 °C equals 0 K (absolute zero).
Getting the best results
- Enter the temperature in the scale you are converting from, then read every other field
- Check negative values carefully — the offset formulas shift the zero point, so a simple ratio would give wrong answers
- All results compute locally in your browser with no waiting and no upload
Verdict
Temperature Converter handles 5 scales with correct offset-based formulas and precise results, all computed locally with no data ever leaving your device.