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Celsius to Fahrenheit
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// about this tool

Celsius to Fahrenheit Online

Updated 2026-07-09

Convert Celsius to Fahrenheit online for free. Enter a temperature in °C and SnapTools shows the exact value in °F instantly, in your browser — nothing is uploaded.

To convert, multiply by 1.8 (9/5) and add 32. For quick reference: 0 °C = 32 °F, 20 °C = 68 °F, 37 °C = 98.6 °F, 100 °C = 212 °F, and −40 °C = −40 °F (the point where both scales meet). Enter any value above for the precise figure, or use the full Temperature Converter to include Kelvin.

// how to use

  1. 1 Type a temperature in Celsius into the input.
  2. 2 SnapTools shows the value in Fahrenheit instantly as you type.
  3. 3 Copy the result, or open the Temperature Converter to include Kelvin.

// examples

Boiling water
Input
100
Output
212
Body temperature
Input
37
Output
98.6

// common uses

Reading a Celsius weather forecast in Fahrenheit Following a recipe or oven temperature across scales Checking a body temperature reading Converting scientific data to Fahrenheit

// faq

No. The conversion runs entirely in your browser, so nothing you enter leaves your machine.
Multiply the Celsius value by 9/5 (which is 1.8) and add 32. So 20 °C becomes 20 × 1.8 + 32 = 68 °F. This tool does it instantly, including decimals.
Double the Celsius value and add 30 for a rough figure — 20 °C is about 70 °F. For an exact answer use the full formula, which this tool applies.
At −40 degrees. Minus forty Celsius is exactly minus forty Fahrenheit, the one point where the two scales meet.
The Fahrenheit scale sets the freezing point of water at 32 and boiling at 212, so converting needs both a multiply (by 1.8) and an add (of 32), unlike a simple factor conversion.

// related

Fahrenheit to Celsius Temperature Converter Kilometers to Miles Kilograms to Pounds Number Base Converter

Use this via API

Get a free API key → 
curl -X POST https://snaptools.dev/api/v1/tools/celsius-to-fahrenheit \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"value":"100"}'
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