The number of miles you need to ride a bicycle to burn the same amount of calories as walking depends on several factors, including your weight, the speed at which you’re walking and cycling, and the terrain. Generally, cycling tends to burn more calories per unit of distance traveled compared to walking, primarily due to the increased effort and muscle engagement required.

On average, a person burns around 30-40 calories per mile when walking at a moderate pace (about 3-4 miles per hour). Cycling, on the other hand, can burn around 40-60 calories per mile when riding at a moderate speed (about 12-14 miles per hour). These calorie estimates can vary based on individual factors.

So, to provide a rough comparison:

• If you burn 40 calories per mile walking, you would need to cycle around 0.67 to 1 mile to burn the same amount of calories.
• If you burn 30 calories per mile walking, you would need to cycle around 0.5 to 0.75 miles to burn the same amount of calories.

Remember that this is a general estimation and the actual calories burned can vary based on your personal characteristics, intensity of exercise, and other factors.