Margin Calculator is not working at all for last few days. Even after 8-9 hours of adding the options, still it is waiting for result. Please look at the end of the below screenshot of the page F&O margin calculator - Zerodha Margin Calculator.
You can click Reset or refresh the page and it should start working.
Probably you missed this statement. It’s not for one day, For last few days I am facing this issue. And I have already done the below before creating the post - refreshing page, clearing browser cache.
Not sure what was the change, but it started working even without a refresh or clear cache today.