Route power planning tool

Hey all,

I am looking for a tool or software where I input a route and tell it I want to do it in x time or x avg speed and it spits out the power output needed to do this. I know Garmin has a ‘power plan’ but it is a little clunky.

There is best bike split and windsock but I am looking for something not so expensive especially when you add in TR and Strava subs.

Any help would be greatly appreciated.