Fahrenheit to Celsius Calculator

Converting Fahrenheit to Celsius comes down to one straightforward calculation. You subtract 32 from the Fahrenheit temperature, then multiply the result by 5/9. That's it.

So if you see a temperature in °F and want to know what it feels like on the Celsius scale, just plug it into that two-step process. It works for any temperature, whether you're dealing with a hot summer day, a freezing winter morning, or a precise cooking temperature.

If math isn't your thing right now, scroll down to the conversion chart or reference table. They cover the most common values so you can find your answer without doing any arithmetic at all.

The official formula for converting Fahrenheit to Celsius is:

°C = (°F − 32) × 5/9

Breaking that down: you start by subtracting 32 from your Fahrenheit value. That step accounts for the offset between where the two scales set their zero points. Then you multiply by 5/9 (which is the same as dividing by 1.8) to adjust for the different size of each degree.

A quick example: to convert 77°F to Celsius, subtract 32 to get 45, then multiply by 5/9 to get 25°C. That's a warm, pleasant day in most parts of the world.

If you need to go the other direction and convert Celsius back to Fahrenheit, the reverse formula is: °F = (°C × 9/5) + 32.

Some temperatures come up over and over, so it's worth just knowing them by heart. Here are the ones people look up most often:

• 32°F = 0°C — the freezing point of water
• 50°F = 10°C — cool, jacket weather
• 68°F = 20°C — a comfortable room temperature
• 77°F = 25°C — warm and pleasant outdoors
• 98.6°F = 37°C — normal human body temperature
• 100°F = 37.8°C — fever territory
• 212°F = 100°C — the boiling point of water
• 350°F = 176.7°C — a standard oven baking temperature
• 451°F = 232.8°C — yes, the temperature from the famous novel

Memorizing even two or three of these (freezing, body temp, boiling) gives you solid anchor points for estimating any conversion on the fly.

This chart covers the range you're most likely to encounter in everyday life, from bitter cold to high-heat cooking. If your number isn't listed, use the formula above or a calculator to get the exact value.

Having a few fixed reference points in your head makes it much easier to interpret temperatures in either scale without needing to calculate anything. Think of these as landmarks on a map.

• Water freezes: 32°F / 0°C
• Water boils: 212°F / 100°C (at sea level)
• Comfortable room temperature: around 68–72°F / 20–22°C
• Healthy human body temperature: 98.6°F / 37°C
• A hot summer day: 95°F / 35°C
• Hypothermia risk begins: roughly 95°F / 35°C body temp (below normal)
• Absolute zero: -459.67°F / -273.15°C (the coldest anything can get)

The freezing and boiling points of water are the most useful anchors since they're exact and easy to remember. Once you know those two, you have a 180°F spread (or 100°C spread) to work with as a mental ruler.

The United States, along with a small number of other countries, uses Fahrenheit as the standard for everyday temperature. Most of the rest of the world uses Celsius, which is also the scale used in science globally.

The two scales were developed independently. Daniel Gabriel Fahrenheit introduced his scale in the early 1700s, originally anchoring it to a brine solution freezing point and human body temperature. Anders Celsius came up with his scale a few decades later, deliberately built around water's freezing and boiling points at 0 and 100 degrees, making it more intuitive for scientific work.

One practical difference: Celsius degrees are larger. One degree Celsius equals 1.8 degrees Fahrenheit, which is why temperature swings in Celsius sound smaller. A 10°C difference feels the same as an 18°F difference.

Neither scale is inherently better for daily use. It mostly comes down to what you grew up with. But Celsius has a clear edge in scientific contexts because its scale maps neatly onto the properties of water.

Knowing how to convert between these two scales shows up more often than you'd think. Here are some situations where it genuinely matters:

• Travel: If you're visiting Europe, South America, or most of Asia, weather forecasts will be in Celsius. Knowing that 30°C is a hot day (86°F) helps you pack appropriately.
• Cooking and baking: Many international recipes list oven temperatures in Celsius. A recipe calling for 180°C is asking for about 356°F, which is close to a standard 350°F bake.
• Medical: Thermometers in other countries display Celsius. A reading of 38°C means a fever (100.4°F). Knowing that distinction matters in a medical situation.
• Science and school: Science classes and labs almost always use Celsius (or Kelvin). Students in the US often need to convert temperatures when working with international data or textbooks.
• Weather apps and international news: News coverage of extreme weather events often includes both scales, but not always. Being able to quickly interpret either one keeps you informed.
• Food safety: Safe internal cooking temperatures are sometimes listed in Celsius on international packaging. Chicken should reach 74°C (165°F) internally, for example.

The bottom line: Fahrenheit to Celsius conversion is one of those small practical skills that comes in handy across cooking, travel, health, and work. Once you know the formula and a few key reference points, you'll rarely be caught off guard by an unfamiliar temperature reading.