Page refresh works of course, but if the widget is down the page it becomes awkward.
And while one can just move the sliders, the more configuration options that there are, the more someone has to check that they have in “reset” each one back to a starting position.
Hi @ElfsightBot, 
a small and quick workarount for a Reset Button to refresh the page to reset the calculation 
Add this Code in the Code Editor
<button onclick="location.reload();">Reset</button>
Add a Heading Field to the Field Section
Or for a button in the Result Section
@Sina, Fantastic 
A huge thank you for sharing your tip with us!
Hey everyone!
We’re happy to share that the Reset Button is already available in the widget 
Find more details in this post: Calculator: Let users reset calculation results in one click