# Fahrenheit to Celsius Converter

Convert Fahrenheit to Celsius instantly. Also shows Kelvin and Rankine. Exact formula °C = (°F - 32) × 5/9 with common temperature.

## What this calculates

Convert any Fahrenheit temperature to Celsius using the exact formula °C = (°F - 32) × 5/9. This converter also displays Kelvin and Rankine equivalents for scientific and engineering use.

## Inputs

- **Temperature in Fahrenheit** (°F) — min -459.67 — Enter a temperature in degrees Fahrenheit.

## Outputs

- **Celsius** (°C) — Temperature in degrees Celsius.
- **Kelvin** (K) — Temperature in Kelvin.
- **Rankine** (°R) — Temperature in degrees Rankine.

## Details

Fahrenheit is the primary temperature scale in the United States, while Celsius is used throughout most of the world and in all scientific contexts. The conversion formula is: °C = (°F - 32) × 5/9. Subtract 32 to remove the offset between the two scales' zero points, then multiply by 5/9 to adjust for the different degree sizes.

Common Fahrenheit to Celsius Conversions

Fahrenheit
Celsius
Description

-40°F
-40°C
Scales intersect

0°F
-17.78°C
Fahrenheit zero

32°F
0°C
Water freezes

68°F
20°C
Room temperature

98.6°F
37°C
Body temperature

212°F
100°C
Water boils

350°F
176.67°C
Common oven temp

400°F
204.44°C
High oven temp

Quick Mental Math Shortcut: Subtract 30, then divide by 2. This gives a rough estimate (e.g., 98°F ≈ 34°C, actual is 36.67°C). For exact conversions, use the 5/9 formula or this converter.

## Frequently Asked Questions

**Q: What is the formula to convert Fahrenheit to Celsius?**

A: The exact formula is °C = (°F - 32) × 5/9. Subtract 32 from the Fahrenheit temperature, then multiply by 5/9 (or approximately 0.5556). For example, 98.6°F = (98.6 - 32) × 5/9 = 66.6 × 5/9 = 37°C.

**Q: What is 72 degrees Fahrenheit in Celsius?**

A: 72°F equals 22.22°C. This is a comfortable room temperature. The calculation: (72 - 32) × 5/9 = 40 × 5/9 = 22.22°C.

**Q: What is normal body temperature in Celsius?**

A: Normal body temperature is 98.6°F, which converts to exactly 37°C. However, normal can range from 97°F to 99°F (36.1°C to 37.2°C) depending on the individual and time of day.

**Q: How do I convert oven temperatures from Fahrenheit to Celsius?**

A: Use the formula °C = (°F - 32) × 5/9. Common baking conversions: 325°F = 163°C, 350°F = 177°C, 375°F = 191°C, 400°F = 204°C, 425°F = 218°C, 450°F = 232°C.

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Source: https://vastcalc.com/calculators/conversion/fahrenheit-to-celsius
Category: Conversion
Last updated: 2026-04-21