X VS Y COMPARISON #92 · SPORTS · HEALTH
Same route, two very different workouts. At the defaults — 160 lb over 3 miles — running at 6 mph burns 356 kcal in 30 minutes, while walking at 3 mph burns 240 kcal in 60 minutes. Running wins on every measure, but the per-mile gap is smaller than most people expect: about 119 vs 80 kcal per mile, roughly 49% more, not double. Enter your own numbers and see where your tradeoff lands.
Both sides cover the distance you enter. Calories use the MET method: calories = MET × weight in kg × hours. Running at 6 mph carries a MET of 9.8 and walking at 3 mph a MET of 3.3 (Compendium of Physical Activities values); other speeds are interpolated between published anchors, so a brisk 4 mph walk uses MET 5.0.
Running beats walking on calories per minute, calories per mile, and time — but the honest headline is the size of the per-mile gap. At the defaults, running burns 356 kcal and walking 240 kcal over the same 3 miles. That is 119 vs 80 kcal per mile, a ratio of about 1.48 to 1. Running does not burn double the calories per mile, despite feeling twice as hard. Where running truly dominates is the clock: it finishes the route in 30 minutes instead of 60, so in a fixed 30-minute window it burns 356 kcal to walking’s 120 kcal — nearly three times as much, because it covers twice the distance at a higher intensity.
Setup: 160 lb (72.57 kg), 3 miles, run at 6 mph (MET 9.8), walk at 3 mph (MET 3.3).
Line 1 — the times. Running: 3 ÷ 6 = 0.5 hours = 30 minutes. Walking: 3 ÷ 3 = 1 hour = 60 minutes.
Line 2 — running calories. 9.8 × 72.57 × 0.5 = 356 kcal, or 119 kcal per mile.
Line 3 — walking calories. 3.3 × 72.57 × 1.0 = 240 kcal, or 80 kcal per mile.
Line 4 — the gap. 356 − 240 = 116 kcal over the route, and running saves 30 minutes. The per-mile ratio is 119 ÷ 80 = 1.48 — about 49% more per mile.
Same speeds, bigger body and route: running burns 741 kcal in 50 minutes and walking 499 kcal in 100 minutes. The absolute gap grows to 242 kcal, but the per-mile ratio is unchanged — weight and distance scale both sides equally, so the 1.48 ratio is a property of the speeds, not the person.
Walk the same 3 miles at a brisk 4 mph and walking burns 272 kcal in 45 minutes against running’s 356 kcal in 30 minutes. Brisk walking closes more than a quarter of the calorie gap and cuts 15 minutes off the casual-walk time. If running hurts or bores you, walking faster is the highest-value change you can make — it keeps most of the benefit with far less impact.
When time, not distance, is the budget, running pulls away: in 30 minutes a runner covers 3.0 miles and burns 356 kcal, while a walker covers 1.5 miles and burns 120 kcal. This is the branch that matters for busy people — running is roughly three times as productive per minute of free time, because it combines a higher burn rate with twice the distance.
As general guidance, running loads each stride with roughly 2.5 times body weight, while walking loads about 1.2 times body weight — so running roughly doubles the peak force per step, and takes those steps faster. That does not mean running damages healthy knees: impact is also how bones and tendons stay strong, and many long-term studies find runners no worse off than walkers. It does mean the injury risk per outing is higher, especially with sudden mileage jumps, worn shoes, or hard surfaces. Walking’s lower impact is its quiet superpower — it is repeatable daily, at almost any age, with minimal recovery. This page gives general information only, not medical advice; if you have joint pain or a medical condition, talk to a clinician before changing your routine.
| Output | Formula | What it means |
|---|---|---|
| Running calories | METrun × kg × hours | 356 kcal at the defaults — 9.8 × 72.57 × 0.5. |
| Walking calories | METwalk × kg × hours | 240 kcal at the defaults — 3.3 × 72.57 × 1.0. |
| Calories per mile | MET × kg ÷ mph | 119 vs 80 — the honest per-mile comparison, about 49% apart. |
| Time for the route | distance ÷ speed | 30 vs 60 minutes — running halves the time for the same route. |
| Fixed-30-minute burn | MET × kg × 0.5 | 356 vs 120 kcal — running wins nearly 3 to 1 when time is fixed. |
| Joint load per stride | general guidance, not computed | ~2.5× vs ~1.2× body weight — running roughly doubles peak force per step. |
MET values are population averages from the Compendium of Physical Activities, not measurements of your body: fitness, terrain, hills, wind, and running form all shift the real burn by 10–20% either way. Speeds between published anchors are interpolated, and the calculator assumes a flat route at a steady pace. Joint-load figures are widely cited general guidance, not a diagnosis of your joints. General information only — not medical advice. Error policy: weight outside 50–500 lb, distance at or below 0 or above 100 miles, non-positive speeds, or a run speed no faster than the walk speed are reported as errors rather than modeled.
Bright Side Kit. "Running vs Walking: Calories, Time & Joint Impact 2026." https://brightoolbox.com/running-vs-walking/ Accessed October 24, 2026.Data sourcesNo — about 49% more, not double. At the defaults, running burns 119 kcal per mile and walking 80, a ratio of 1.48. The “double” myth comes from comparing a fixed time window, where running does burn nearly three times as much because it covers twice the distance. Per mile, the gap is real but modest.
Yes, if you do enough of it. A 3-mile walk burns 240 kcal at the defaults; done daily, that is 1,680 kcal a week, roughly half a pound of fat per week before any diet change. Walking’s advantage is consistency: it is easy to repeat daily without soreness or injury layoffs that erase a runner’s week.
About 119 kcal per mile at 160 lb and 6 mph. The rule of thumb is roughly 0.75 kcal per pound per mile for running, which gives 120 kcal at 160 lb — right in line with this calculator. Heavier runners burn more per mile; lighter runners burn less.
For healthy knees, the evidence says no. Running loads each stride at about 2.5 times body weight versus 1.2 times for walking, but impact also strengthens bone and tendon, and long-term studies generally find runners have no higher rates of knee arthritis than walkers. Sudden mileage spikes and poor recovery cause most running injuries, not running itself. This is general information, not medical advice.
Brisk walking at 4 mph is the sweet spot. At the defaults it burns 272 kcal over 3 miles instead of 240 at 3 mph, finishes 15 minutes sooner, and still feels sustainable. If you can talk but not sing, you are at the right intensity.
Run, if your body allows it. In 30 minutes the defaults give running 356 kcal over 3.0 miles versus walking 120 kcal over 1.5 miles. If running is off the table, walk briskly at 4 mph: you will cover 2 miles and burn about 181 kcal in the same half hour.
Because then there is no running side to compare. If your “run” is slower than your walk, the labels are swapped — fix the speeds and the comparison works. The calculator reports the mix-up as an error instead of printing a backwards verdict.
Yes, and they help walking more than running. Hills raise the MET of both, but walking uphill closes much of the gap because the extra effort of climbing dominates the speed difference. On a steep route, a brisk uphill walk can approach a flat run in calories per hour.