Walking vs Running a Mile: Calories

Running costs about 41 percent more per mile, and close to double once resting comes out#

Running, and by more than the folklore admits. When 24 adults covered 1,600 m under indirect calorimetry — actual gas analysis, not a formula — the run cost 481 ± 20 kJ and the walk cost 340 ± 14 kJ, roughly 115 calories against 81. Repeated on an outdoor track instead of a treadmill, the same comparison came out at 480 and 334 kJ¹. Same distance, same people, a 41 percent premium for the run.

Then the accounting gets strange, and it runs opposite to the way these adjustments normally run. Subtracting the energy you would have spent anyway is the correction that makes nearly every exercise number smaller. Here it makes the gap bigger — because the walk takes twice as long and therefore absorbs twice as much resting metabolism into its total. Make that subtraction and running a mile costs a bit under double what walking one does. A second, entirely separate line of evidence lands on almost exactly the same ratio.

If you arrived from does exercise burn as many calories as you think, nothing here disturbs that conclusion: both figures are smaller than a wrist device reports and both are partly clawed back afterwards. This is only about which of the two is larger, and by how much.

Where "a mile is a mile" came from, and why it survives#

The claim usually arrives in a confident, symmetrical form: it takes the same energy to move your body a mile whether you stroll it or sprint it, so the only thing running buys is time. Half of that is a genuine research finding, and the other half is a mistranslation of it.

The genuine half is within running. Running's cost is paid per unit of distance, so the price of a running mile barely moves with pace — the point worked through in what a running mile actually costs. Walking behaves similarly across ordinary paces, as the walking numbers show. Somewhere in the retelling, a statement about pace quietly became a statement about gait, and the two were flattened into one.

They are not one. Walking and running are mechanically different problems. Walking vaults the body over a stiff leg and recovers energy pendulum-style; running bounces on tendons that store and return it, and pays a launch cost every stride that walking never pays. Nothing guarantees those two solutions price out the same, and measured side by side they don't.

The subtraction that widens the gap#

Both of the neighbouring articles above make the resting deduction — charging a walk or a run only for the energy above what your body was already spending. Neither makes it comparatively, and that is where the interesting number hides.

At the paces Hall's group tested, 1,600 m took about 18.9 minutes on foot and about 9.5 minutes at a run. Assume a resting rate near 1.2 kcal a minute, ordinary for an adult of average size — our assumption, not a figure from the paper — and the ledger looks like this:

	Walking 1,600 m	Running 1,600 m
Time at the tested pace	~18.9 min	~9.5 min
Gross cost, measured	340 kJ ≈ 81 kcal	481 kJ ≈ 115 kcal
Resting metabolism absorbed	~23 kcal	~11 kcal
Net cost of the distance	~59 kcal	~104 kcal
Net cost per minute	~3.1 kcal	~11.0 kcal

Only the gross row is measured; everything below it is our arithmetic on Hall's published values plus a stated resting assumption, and it should be read as an order of magnitude. But the direction is not sensitive to the assumption. Any resting rate you plug in gets charged to the walk for twice as long as it gets charged to the run.

Every other correction in this literature shrinks the exercise number. This one shrinks the walk twice as hard as it shrinks the run, because the walk spends twice as long borrowing calories it was going to spend regardless.

So the gross premium of 41 percent becomes a net premium near 77 percent. The mile you walked was never as expensive as its gross number implied, and it is precisely the correction that walking-calorie tables leave out.

A separate dataset lands on almost the same ratio#

Energetics researchers rarely talk in calories per mile; they use cost of transport, the energy a body spends per kilogram per metre travelled. Measured on 10 runners across a treadmill tilted from −45 to +45 percent, level running came out at 3.40 ± 0.24 J·kg⁻¹·m⁻¹ and, as expected, was independent of speed. Level walking bottomed out at 1.64 ± 0.50 J·kg⁻¹·m⁻¹, at a speed of 1.0 ± 0.3 m/s².

Divide one by the other and running costs 2.07 times what walking costs per metre. For a 70 kg adult over a mile, our conversion of those rates gives roughly 92 calories running against 44 walking.

That 2.07 and the 1.77 from Hall's data are not in conflict, and the thing separating them is specific: walking speed. Minetti's walking figure is the minimum of a U-shaped curve, taken at about 2.2 mph — a stroll. Cost of walking climbs steeply on either side of that optimum, and Hall's walkers were moving at 1.41 m/s, closer to 3.2 mph. Walk briskly and you close part of the gap; amble and you widen it. Two studies, two walking speeds, one consistent picture: running the mile costs somewhere between about 1.8 and 2.1 times what walking it does, net.

How much of the run's edge is afterburn?#

A third study measured recovery as well as the effort. Thirty adults of average fitness (15 women, 15 men, mean VO₂max 41.5 ml·kg⁻¹·min⁻¹) covered 1,600 m walking at 86 m/min and running at 160 m/min. During the effort itself: 372.54 ± 78.16 kJ for the walk, 471.03 ± 100.67 kJ for the run. Adding the post-exercise period, the totals became 463.34 ± 80.38 kJ and 664.00 ± 149.66 kJ³.

Read as reported, the recovery term widens the run's advantage from 26 percent to 43 percent — the run picks up about 46 extra calories to the walk's 22. Read against the same study's recovery clock, it shrinks: expenditure was back at resting values 15 minutes after the run and 10 minutes after the walk. Whatever that term is measuring, it is measuring minutes, not the hours the afterburn gets sold in — which is the whole argument of the afterburn effect. It nudges the ranking in running's favour and it cannot carry a diet.

The loosest number here is the walking one#

Worth knowing before you spend any of these figures: the uncertainty is not evenly distributed. Prediction equations for walking are noticeably worse than the confidence with which apps quote them. Against 127 aggregated laboratory values, the ACSM and Pandolf equations underpredicted nearly all of them⁴. Taken outdoors onto a 6,415 m mixed-terrain course with seven subjects, the same equations swung the other way: ACSM overpredicted by 13 percent, Pandolf by 17, Looney by 20, while a mechanics-based model landed within 4 percent — and between-equation differences reached 37 percent in simulation⁵.

Thirty-seven percent, purely from which model your app happens to use. That band is wide enough to swallow the difference between a stroll and a brisk walk. It is not wide enough to swallow a factor of two.

The comparison that actually decides your week#

Almost nobody budgets in miles. You budget in the half-hour you can find.

On the net figures above, thirty minutes of walking at Hall's pace covers about 1.6 miles for roughly 93 calories. Thirty minutes of running at Hall's pace covers about 3.2 miles for roughly 329 calories. Per unit of time — the unit your calendar actually issues — running is about three and a half times the walk, not 77 percent more, because it wins twice: dearer per mile and more miles per hour.

Which is the argument for running, and also its limit. That 3.5× multiplier applies only to the minutes you can actually sustain, at an impact cost walking never charges. Walking's case has never been per-minute density; it is that you will do it tomorrow, and the day after, and for decades — the reason step counts predict what they do. The mile is running's fight and running wins it. The week is a different fight.

FAQ#

Is it true that walking and running a mile burn the same calories?#

No. Measured directly in 24 adults, running 1,600 m cost 481 kJ against 340 kJ walking it — about 41 percent more, gross. Subtract the resting energy each takes on board and the gap grows, because the walk lasts twice as long: roughly 104 calories against 59 on our arithmetic. A separate cost-of-transport dataset puts running at 2.07 times walking per metre. The claim is popular and it is wrong by roughly a factor of two.

If I only have half an hour, is walking or running the better use of it?#

Running, by a wide margin, if calories are the only criterion. On the net figures here, thirty minutes of running is worth roughly 329 calories against 93 for thirty minutes of walking — about three and a half times, because running is both dearer per mile and covers more miles in the time. That ratio only applies to minutes you can genuinely sustain, and it ignores the impact load, so it is an argument about arithmetic rather than about what you should do.

Does running's afterburn make the mile worth much more than the walk?#

A little, and only briefly. In the one study here that measured recovery, the post-exercise period added about 46 calories after the run and 22 after the walk — but expenditure was back at resting values within 15 minutes of the run and 10 of the walk. It tilts the comparison slightly toward running and is far too small and too short to be a reason to choose one over the other.

Sources#

This article was researched and drafted with AI assistance and reviewed for accuracy by the BurnWeek team. It is general information, not medical advice. How we research and correct our articles →