if i burned off 150 kilocalories on a bike how much did I really burn off?

Question

on a exercise bike.

i was on it for about 40-50 minutes, going about a steady 18 mph.

Answer 1

dont count calories burned since they are not precise
if you want to lose weight you have to do cardio 4-6times a week for 30-50min and light weight training

Answer 2

that going to be 150 kilo.cal *1000= 150000 i think but it seems like to much to burn how long have you been on the bike

Answer 3

150 "dietitian's calories" or, just 150 normal calories. The actual normal calorie is very, very small compared to a food calorie.