As a runner who also cycles I'm seeing a roughly 3:1 distance ratio and slightly less than 1:1 time ratio in terms of cycling vs running calorie burn estimates (running higher/hr). These seem to be roughly consistent on both my Garmin (Edge & FR235 using HRM) and Apple Watch. All that said, I feel a bunch better after a 2 hour ride than a 2 hour run.
Of course - that's all with my terrain (slightly hilly), at my paces, and with my bike (hybrid). YMMV based on your own particular situation.
Last edited by gpburdell; 09-27-21 at 09:43 AM.