Temperature Converter
Convert Celsius, Fahrenheit, and Kelvin instantly with exact formulas — including absolute zero checks, a live conversion table, and copy/share tools.
Reviewed October 7, 2026 Runs in your browser — inputs are never stored
0 °C = 32 °F
Conversion table — 0 °C equals:
| Scale | Symbol | Value |
|---|---|---|
| Celsiusselected | °C | 0 |
| Fahrenheitselected | °F | 32 |
| Kelvin | K | 273.15 |
Learn more about temperature conversion — read our Temperature Converter guide with formulas, tables, absolute zero, and practical examples.
0 °C = 32 °F = 273.15 K. Water freezes at 0 °C and boils at 100 °C at sea level.
- Below freezing
- Cold to cool
- Mild / room
- Warm to hot
- Very hot
- Boiling and above
This tool provides general unit conversions for everyday and educational use. For regulated, legal, or scientific applications, verify conversion factors against the applicable official standard.
About the Temperature Converter
A temperature converter is a precise tool that translates values between Celsius, Fahrenheit, and Kelvin — the three scales used in weather, science, cooking, and industry. It is built for students verifying chemistry and physics calculations, travellers making sense of foreign weather forecasts, cooks adapting oven settings from international recipes, and engineers working with thermodynamic specifications. Because temperature scales have different zero points, the converter applies the correct offset formulas rather than simple ratios, and it guards against physically impossible values such as negative Kelvin. Alongside the instant result, it shows the exact formula used, a live conversion table across all three scales, and quick-reference points such as freezing, body temperature, and absolute zero. Copy, reset, and share actions make it easy to record or pass on an answer. By removing the manual arithmetic that so often causes errors in offset conversions, the tool delivers accurate, private, and instant results for any temperature you need to understand or communicate.
How to use it
- 1Type the value you want to convert.
- 2Choose the unit you are converting from and the unit you want (for example Fahrenheit to Celsius).
- 3The result updates as you type; use the swap button to reverse the direction.
- 4Copy or share the result with the buttons below it.
Worked example
an oven set to 350 °F is (350 − 32) × 5/9 ≈ 176.7 °C. A body temperature of 37 °C is 98.6 °F, and 0 °C is 273.15 K.
Who it is for
Travellers making sense of foreign weather forecasts, cooks adapting oven temperatures from international recipes, students verifying chemistry and physics calculations, and engineers working with thermodynamic specifications.
Why it helps
Temperature scales have different zero points, so conversions use offset formulas (not simple ratios) that are easy to get wrong by hand — especially the −40 crossover and absolute-zero checks.
Common use cases
- Converting oven temperatures in recipes
- Understanding weather forecasts while travelling
- Converting lab temperatures to Kelvin
Tips for better results
- For a quick mental °C→°F estimate, double the Celsius value and add 30 — close enough for everyday weather.
- Remember −40 is the one temperature where Celsius and Fahrenheit read exactly the same.
- Kelvin never goes below 0 (absolute zero); the tool flags physically impossible inputs for you.
- When adapting oven recipes, convert the temperature then round to the nearest 5° your oven supports.
Common mistakes to avoid
- Treating temperature like a ratio (multiplying °C by 1.8 without adding 32) — this misses the offset entirely.
- Entering a Kelvin value below 0, which is physically impossible (absolute zero is 0 K = −273.15 °C).
- Confusing the direction of conversion and applying the °F→°C formula when you meant °C→°F.
- Forgetting that a 1° change in Celsius equals a 1.8° change in Fahrenheit (different from the absolute conversion).
Frequently asked questions
A:Multiply by 1.8 (or 9/5), then add 32. Formula: °F = (°C × 1.8) + 32. Example: 25 °C = 77 °F.
A:Subtract 32, then divide by 1.8. Formula: °C = (°F − 32) ÷ 1.8. Example: 68 °F = 20 °C.
A:Absolute zero is 0 K, equal to −273.15 °C or −459.67 °F — the lowest theoretically possible temperature.
A:It is the unique temperature where the Celsius and Fahrenheit scales intersect. Solving C = C×1.8+32 gives C = −40.
A:No. Kelvin is an absolute scale starting at absolute zero (0 K). Negative kelvin values are physically invalid.
Reviewed for accuracy · Last updated October 7, 2026
Conversion factors are based on internationally defined SI units and standard metric/imperial equivalence tables.
CalcWisee Editorial Team
Calculator development and formula review
CalcWisee is an independent site founded by Ayman. Every calculator is built from a published formula or official definition, tested against hand-worked examples before it goes live, and corrected promptly when a reader reports an issue to ayman@calcwisee.com.
Expertise: Financial mathematics, Health and fitness formulas, Applied mathematics, Unit conversion standards
References & sources
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