Convert Temperature
Converted Value (click to copy)
32.00
All conversions happen locally — instant and private.
Temperature Scales Compared
Celsius, Fahrenheit, and Kelvin side by side
Boiling (100°C / 212°F / 373.15 K) — Body (37°C / 98.6°F / 310.15 K) — Room (20°C / 68°F / 293.15 K) — Freezing (0°C / 32°F / 273.15 K) — Absolute zero (-273.15°C / -459.67°F / 0 K)
Common Reference
| Point | Celsius | Fahrenheit | Kelvin |
|---|---|---|---|
| Absolute Zero | -273.15°C | -459.67°F | 0 K |
| Freezing Point | 0°C | 32°F | 273.15 K |
| Room Temperature | 20°C | 68°F | 293.15 K |
| Body Temperature | 37°C | 98.6°F | 310.15 K |
| Boiling Point | 100°C | 212°F | 373.15 K |
100% Private & Secure: All conversions are calculated locally in your browser. No data is ever sent to a server.
How to Use This Temperature Converter
Getting a conversion takes about two seconds:
- Enter a value in the "Value" field — for example, 37 for body temperature.
- Pick the source unit from the first dropdown (e.g., Celsius).
- Pick the target unit from the second dropdown (e.g., Fahrenheit).
- Read the result — the green box updates live as you type.
Click the result box to copy the value to your clipboard, ready to paste into any document or chat.
💡 Pro tip: When traveling between countries, remember that temperature differences that feel "small" in one scale can feel "large" in another. A 10°C drop is a 18°F drop — always convert before comparing.
Temperature Conversion Formulas
Use these formulas to convert manually:
Celsius → Fahrenheit
°F = (°C × 9/5) + 32
Fahrenheit → Celsius
°C = (°F − 32) × 5/9
Celsius → Kelvin
K = °C + 273.15
Kelvin → Celsius
°C = K − 273.15
Fahrenheit → Kelvin
K = (°F + 459.67) × 5/9
Kelvin → Fahrenheit
°F = (K × 9/5) − 459.67
Common Uses of a Temperature Converter
- Travel and weather. Check what a "22°C" forecast means in Fahrenheit before you pack for a trip.
- Cooking. Recipes often specify oven temperatures in °C or °F depending on the country of origin.
- Science and lab work. Thermodynamics calculations require Kelvin (absolute scale), not Celsius or Fahrenheit.
- Medicine. Body temperature is usually recorded in °C in most countries, but °F in the US — converting helps you understand a fever or hypothermia.
- Engineering. Material properties like melting points or thermal expansion coefficients are often specified in Kelvin.
- HVAC and refrigeration. HVAC techs switch between scales depending on the equipment's country of origin.
Common Mistakes to Avoid
- Using the wrong formula for the direction. Celsius → Fahrenheit adds 32 after multiplying; Fahrenheit → Celsius subtracts 32 before multiplying.
- Writing "°K" instead of "K". Kelvin is an absolute unit and never uses the degree symbol. The correct form is "300 K", not "300 °K".
- Forgetting that Kelvin is absolute. Kelvin has no negative values — 0 K is the coldest anything can be, and there is nothing below it.
- Assuming a 1°F change equals a 1°C change. A 1°C change equals a 1.8°F change. This matters when reading temperature differences or thermal tolerances.
- Rounding mid-conversion. Round only at the final step. Our converter keeps full precision through the calculation and only rounds for display.
Why We Built This Tool
Temperature conversions come up constantly — checking a recipe, reading a weather forecast, doing physics homework, or working with international equipment. Most online converters either bury the answer in ads, use sloppy rounding, or fail on mobile.
Ours runs entirely in your browser, uses the exact conversion formulas with proper precision, and works offline once loaded. If you spot a bug, or you'd like a new feature — like a Celsius/Fahrenheit "feels like" calculator, or a preset for oven temperatures — drop us a note using the contact link below.
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Frequently Asked Questions
Multiply the Celsius value by 9/5 (that is, 1.8) and add 32. For example, 20°C = (20 × 1.8) + 32 = 68°F. Our converter handles this instantly — just enter the value, choose Celsius as the source, and Fahrenheit as the target.
Absolute zero is the lowest possible temperature, where molecular motion stops completely. It equals 0 Kelvin, -273.15°C, or -459.67°F. Nothing can be colder than absolute zero — it is a fundamental limit imposed by thermodynamics.
Daniel Fahrenheit chose 0°F as the coldest temperature he could achieve in his lab (a mixture of ice, water, and salt) and 96°F as the human body temperature. Later this was refined so that water freezes at 32°F and boils at 212°F — a difference of exactly 180 degrees. His scale is still used in the US, Bahamas, and a few other countries.
Kelvin is the SI base unit of temperature. It starts at absolute zero, so there are no negative Kelvin values — the coldest anything can be is 0 K. Unlike Celsius and Fahrenheit, Kelvin does not use the degree symbol: you write "300 K" not "300 °K". This is because Kelvin is an absolute scale, not a relative one.
Subtract 32 from the Fahrenheit value, then multiply by 5/9. For example, 98.6°F = (98.6 − 32) × 5/9 = 37°C, which is normal body temperature. To go from Celsius to Fahrenheit, reverse it: multiply by 9/5 and add 32.
At -40°. That is, -40°C equals -40°F. This is the only temperature where the two scales give the same number. It's a useful sanity check: if you ever convert and both numbers look identical, you know you're at the crossover point.
The widely accepted average is 37°C, which equals 98.6°F or 310.15 K. In practice, normal body temperature fluctuates between 36.1°C and 37.2°C (97°F to 99°F) throughout the day, with the lowest readings in the early morning and the highest in the late afternoon.
The converter runs entirely in your browser using JavaScript, so no values are ever transmitted or stored on a server. It works fully offline once the page has loaded, and all conversions use exact formulas with proper rounding to two decimal places.