I have two unrelated questions on tracking performance.

Speed question, specifically as it relates to a Kickr Bike. When you begin a video and Bluetooth connects to the bike, you have two speed options to choose from. One is the speed the bike records and the other is the Wahoo calculated speed. For those who have a Kickr Bike, any feel for which might be a more accurate representation of what your effort would yield in speed out on the road?

Power question, specifically calculating power when riding out on the road. I don’t have a power meter so I don’t have anything that calculate power when I am out on the road. Is there a calculator out on the web or is there a formula for calculating your power? I have the usual info to work with; distance, time, total climb.

Thanks in advance.