Kinomap calculates your speed based on the power produced (see this article)
A calibration of the equipment can be very useful to receive the most accurate power from the equipment.
Depending on your equipment, you'll need to install the manufacturer's application to perform this calibration.
Below you'll find the manufacturers offering a calibration application:
Tacx: Use the TACX utility app: IOS - Android
Jetblack: Use the MYJETBLACK app: IOS - Android
Wahoo: Use the Wahoo utility app: IOS - Android
Elite: Use the myETraining app: IOS - Android
Kinetic: Use the Kinetic Fit app: IOS - Android
Bkool: Use the Bkool simulator app: IOS - Android
Note: Some bike trainers can't be calibrated.