How long would it take to lose 1 pound on a treadmill?

Losing 1 pound on a treadmill requires burning roughly 3,500 calories, which translates to approximately 7–10 hours of total walking time spread across multiple sessions for most adults at moderate pace.

The exact time depends on body weight, speed, and incline. A 155-pound person walking at 3 MPH on a treadmill burns around 250–300 calories per hour on flat ground. At that rate, reaching a 3,500-calorie deficit through treadmill use alone takes 12–14 hours of walking. Increasing speed to 4–5 MPH or adding incline can push the hourly burn to 400–500 calories, cutting total time to 7–9 hours. Treadmill sessions don't need to be consecutive — daily 45-to-60-minute walks accumulate that deficit over 1–2 weeks.

• Calorie deficit required to lose 1 pound of body fat: approximately 3,500 calories.
• Treadmill calorie burn at 3 MPH (155 lb person, flat): roughly 250–300 calories per hour.
• Treadmill calorie burn at 5 MPH (155 lb person, flat): roughly 450–500 calories per hour.
• Estimated total treadmill time to burn 3,500 calories: 7–14 hours depending on pace and body weight.
• At one 60-minute daily treadmill session, 1-pound loss through exercise alone takes approximately 7–14 days.