BodyCalThe short answer
A pound of body fat stores roughly 3,500 calories, and walking burns very approximately 100 calories per mile for an average adult. Since about 2,000 steps make up a mile, that works out to somewhere around 35,000 to 40,000 steps to burn a single pound of fat — the equivalent of roughly 18 to 20 miles of walking.
Spread over a week, that's about 5,000 to 6,000 extra steps a day to lose a pound a week from walking alone — on top of whatever you already do, and assuming your eating stays the same.
Why the number varies
That 100-calories-per-mile figure is an average, not a rule. Heavier people burn more per step because they're moving more mass; taller people cover more ground per stride; and walking faster or uphill raises the burn. A 90 kg person might burn 130 calories a mile while a 55 kg person burns 70.
Our steps calculator estimates your personal figure from your weight and height, so you get a number that actually reflects your body rather than a one-size-fits-all guess.
You can't outwalk your fork
Here's the catch: it's far easier to eat 300 calories than to walk them off. A single muffin can wipe out 6,000 steps of effort in about ninety seconds. That's why walking alone is a slow way to lose fat if your diet isn't in check — the maths just favours the fork.
This isn't a reason to skip the steps; it's a reason to pair them with a modest calorie deficit. Together they work; on its own, walking struggles to keep up with a careless diet.
The smart way to use steps for fat loss
Treat steps as a powerful supporting act. Adding 2,000 to 4,000 steps a day creates a real, sustainable calorie burn without a formal workout, and unlike hard exercise you can do it every single day without needing to recover. Combine that with a small deficit — a few hundred calories below maintenance — and the two add up quickly.
The bonus is that walking does far more than burn calories: it lowers stress, improves mood and sleep, and gets you outside. Use our steps calculator to set a target and the calorie deficit calculator to plan the eating side, and let them work together.