We already have a feature request for introducing a standalone RadCalculator
control which may support all of the listed required functionalities. You can track the feature request's progress, subscribe for status changes and add your comments on the following link - https://feedback.telerik.com/winforms/1370530-add-new-control-add-radcalculator-as-a-standalone-control-that-can-be-hosted-in-a-form
Make sure that you cast your vote for it since it will increase its priority.
I hope this information helps. If you need any further assistance please don't hesitate to contact me.
Dess | Tech Support Engineer, Sr.
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