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All Calcs.com licenses work on a floating concurrency model - i.e. they are ‘shared’ by default. (Note, if you are on a historical individual plan, please contact us to

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How many can access Calcs.com at once?

Only as many users may be logged in and working on a project in Calcs.com at any one time as you have subscribed shared licenses. So for example, if you have one shared license, one person may use the software at a time. We only measure users actively working on projects and calculations, so IT and billing administrators do not count towards your limit.

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How many users can I add?

You may add as many users as you would like to Calcs.com, so everyone still gets the benefit and security of their own account and projects.

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What happens if I go over my user limit?

If too many users log in at once, you don’t need to worry - we’ll give a friendly warning that you’re over your limit, and if this happens repeatedly we may show upgrade options or contact you to discuss subscribing for additional licenses.