In terms of relative calorie burn, biking burns roughly 110% more calories than walking.
Below is a more accurate calorie burn for biking vs walking (the difference between the 2).
Calories Burned based on Time and Weight.
Calories Burned in 1 hour
Weight 100lb:191
Weight 120lb:229
Weight 125lb:238
Weight 150lb:286
Weight 175lb:333
Weight 200lb:381
Weight 250lb:476
Weight 300lb:572
Calories Burned in 40 minutes
Weight 100lb:127
Weight 120lb:152
Weight 125lb:159
Weight 150lb:191
Weight 175lb:222
Weight 200lb:254
Weight 250lb:318
Weight 300lb:381
Calories Burned in 40 minutes
Weight 100lb:127
Weight 120lb:152
Weight 125lb:159
Weight 150lb:191
Weight 175lb:222
Weight 200lb:254
Weight 250lb:318
Weight 300lb:381
Calories Burned in 45 minutes
Weight 100lb:143
Weight 120lb:171
Weight 125lb:179
Weight 150lb:214
Weight 175lb:250
Weight 200lb:286
Weight 250lb:357
Weight 300lb:429
Calories Burned in 1 hour 30 mins
Weight 100lb:286
Weight 120lb:343
Weight 125lb:357
Weight 150lb:429
Weight 175lb:500
Weight 200lb:572
Weight 250lb:714
Weight 300lb:857
Calories Burned in 2 hours
Weight 100lb:381
Weight 120lb:457
Weight 125lb:476
Weight 150lb:572
Weight 175lb:667
Weight 200lb:762
Weight 250lb:953
Weight 300lb:1143
