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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.

This browser cannot show notifications from websites.
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.

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Waist-to-Height Ratio Calculator

Calculate your waist-to-height ratio as an adult screening measure.

My tools →

Waist-to-height ratio

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Screening range

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Adult screening measure only. It does not diagnose a health condition.

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

How to use the Waist-to-Height Ratio Calculator

  1. 1 Enter the requested details.
  2. 2 Review the estimate and the limitations shown with it.

How the estimate works

Divide waist circumference by height using the same unit. A ratio below 0.5 is commonly described as a lower central-adiposity range; 0.5–0.59 indicates increased central adiposity, and 0.6 or more is a higher range. It is a screening measure, not a diagnosis. Source: NICE guidance.

How to use this calculator

Enter the requested values and review the result alongside the limits of the estimate.

Important limitations

This result is for general information. Individual circumstances can change what is appropriate; consult a qualified professional when making health decisions.

Frequently asked questions

How does this calculator work?

Divide waist circumference by height using the same unit. A ratio below 0.5 is commonly described as a lower central-adiposity range; 0.5–0.59 indicates increased central adiposity, and 0.6 or more is a higher range. It is a screening measure, not a diagnosis. Source: [NICE guidance](https://www.nice.org.uk/guidance/ng246/chapter/Identifying-and-assessing-overweight-obesity-and-central-adiposity).

Is this a diagnosis or personalized advice?

No. This is an informational estimate and does not replace professional advice.

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