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Sync settings

Choose what your account keeps in step on every device where you are signed in.

  • My tools

    Always synced: the tools on your board, their order and size.

  • The windows open on your start page, including what you typed in them.

  • Every note in the notepad – on the notepad page, on your board and in windows.

  • Every list of website shortcuts – on the shortcuts page, on your board and in windows.

  • Every grid in the cover grid maker – on its page, on your board and in windows.

  • Every list of bookmarked organisations in the OIN lookup – on its page, on your board and in windows.

  • Keeps your pipeline and saved recipes on all your devices. Your files are never synced – only the steps and settings.

Turning something off removes it from your account straight away. Your devices keep their own copy.

Notifications

Tools that can tell you about something new while a Synsi tab is open, even when you are in another tab or app. Choose them for this browser.

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Notifications are blocked for this site. Allow them in your browser’s site settings (the icon left of the address), then switch them on here.
  • Says “New message” while a Synsi tab is open – never who wrote it or what.

Your choice is stored in this browser only. Notifications never show personal content such as a message or a number. They work while a Synsi tab is open; closed tabs get none.

Convert Fahrenheit to Celsius (°F to °C)

Convert degrees Fahrenheit to degrees Celsius instantly.

My tools →
Result –

Runs in your browser – your data never leaves your device Also available via our free API

Conversion table: Fahrenheit (°F) to Celsius (°C)

Fahrenheit (°F) Celsius (°C)
-40 -40
-20 -28.8889
-10 -23.3333
0 -17.7778
10 -12.2222
20 -6.6667
25 -3.8889
30 -1.1111
37 2.7778
40 4.4444
50 10
100 37.7778

How to use the Fahrenheit to Celsius

  1. 1 Choose a category, such as length or temperature.
  2. 2 Enter the value and pick the unit to convert from and to.
  3. 3 Read the result; use the ⇄ button to swap the units.

Formula

°C = (°F − 32) × 5/9

Subtract 32 first, then multiply by 5/9 (about 0.556). For example, 100 °F − 32 = 68, × 5/9 = 37.8 °C.

Oven temperatures

°F °C Use
325 °F 163 °C slow baking
350 °F 177 °C cakes, cookies
400 °F 204 °C roasting vegetables
450 °F 232 °C pizza, bread

Many European ovens are set in steps of 10 °C, so round to the nearest setting.

Frequently asked questions

What is 100 °F in Celsius?

100 °F is 37.8 °C – a mild fever in body-temperature terms.

What is 350 °F in Celsius?

350 °F is 176.7 °C, usually set as 175–180 °C.

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