Temperature Converter

Converts temperature between Celsius, Fahrenheit and Kelvin. Unlike most unit conversions this one is not a simple multiplication — Fahrenheit is offset as well as scaled (°F = °C × 9/5 + 32), which is exactly why people reach for a converter rather than doing it in their head.

How to use

1. Enter a temperature in any of the three scales.
2. The other two update instantly.
3. For quick intuition: 0 °C is 32 °F, 100 °C is 212 °F, and −40° is where the two scales meet.
4. Kelvin is Celsius plus 273.15 — no degree sign, used in science.

When you actually need this

• Converting a US weather forecast or thermostat setting into Celsius.
• Translating oven temperatures in American recipes — 350 °F is about 175 °C.
• Reading a body temperature quoted in the other scale — 98.6 °F is 37 °C.
• Converting lab or datasheet values between Kelvin and Celsius.

Why temperature conversion has an offset

Celsius pins 0 and 100 to water's freezing and boiling points; Fahrenheit's zero came from an ice-salt brine, putting water at 32 and 212 — same physical world, different anchors, hence the +32 shift that breaks simple ratio thinking. A useful consequence: temperature differences convert by ratio alone, so a rise of 10 °C is a rise of 18 °F, no offset involved. Kelvin starts at absolute zero (−273.15 °C), which is why it appears in physics: doubling kelvins genuinely doubles thermal energy, something neither everyday scale can claim.

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FAQ

How precise are the conversion factors in Temperature Converter?

The factors are the internationally defined exact values — one inch is exactly 25.4 millimetres, one pound is exactly 0.45359237 kilograms, and so on. Results are computed at full floating-point precision and only rounded for display.

Can I convert between metric and imperial units in both directions?

Yes. Enter a value in any field and every other unit updates at once, so the conversion works in either direction without switching modes or pressing a button.

Why does the last decimal place sometimes look off?

Because many conversions are irrational in decimal form and browsers use binary floating point, the final digit can differ by a tiny amount. The displayed value is rounded sensibly for everyday use; for laboratory or engineering work, carry the unrounded figure through your own calculation.