A good workout typically burns between 200 and 500 calories per hour, depending on the type of exercise, your body weight, and how hard you push. A 155-pound person running at a moderate pace for 30 minutes burns roughly 288 calories, while the same person doing general weight lifting for 30 minutes burns closer to 108. The range is wide because “a good workout” means very different things to different people.
Body Weight Changes Everything
Your body weight is one of the biggest factors in how many calories you burn during exercise. A heavier body requires more energy to move, which means more calories spent doing the exact same activity. Harvard Health Publishing provides a useful comparison across three weight categories for 30 minutes of exercise:
- Running at 5 mph: 240 calories (125 lbs), 288 calories (155 lbs), 336 calories (185 lbs)
- Elliptical trainer: 270 calories (125 lbs), 324 calories (155 lbs), 378 calories (185 lbs)
- High-impact aerobics: 210 calories (125 lbs), 252 calories (155 lbs), 294 calories (185 lbs)
- Stationary bike (moderate): 210 calories (125 lbs), 252 calories (155 lbs), 294 calories (185 lbs)
- Swimming (general): 180 calories (125 lbs), 216 calories (155 lbs), 252 calories (185 lbs)
- General weight lifting: 90 calories (125 lbs), 108 calories (155 lbs), 126 calories (185 lbs)
That gap between a 125-pound and 185-pound person is roughly 40% more calories burned for the heavier individual, which adds up significantly over a full workout. If you want to estimate your own burn more precisely, there’s a simple formula: multiply 0.0175 by the activity’s MET value (a standardized intensity rating you can look up for almost any exercise), then multiply by your weight in kilograms, then multiply by the number of minutes. That gives you total calories.
Cardio Burns by Intensity and Duration
Intensity matters as much as what exercise you choose. Moderate-intensity exercise puts your heart rate at 50% to 70% of your maximum, while vigorous exercise pushes it to 70% to 85%. The calorie difference between the two is substantial. A 155-pound person walking briskly at 3.5 mph burns about 133 calories in 30 minutes. That same person running at 7.5 mph burns 450 calories in the same time, more than triple the output.
For a typical “good” cardio session lasting 30 to 45 minutes at moderate to vigorous intensity, most people burn somewhere between 250 and 500 calories. The higher end of that range requires genuinely hard effort: fast running, high-impact step aerobics, or vigorous cycling at 14 to 16 mph. The lower end covers brisk walking, swimming at a casual pace, or moderate cycling.
Some of the highest calorie-burning activities per minute include running at 10 mph (a 155-pound person burns 562 calories in just 30 minutes), high-impact step aerobics (360 calories), and fast cycling (360 calories). Cross-country hiking, basketball, and rowing are also solid calorie burners, all landing in the 216 to 288 range per half hour for a 155-pound person.
Strength Training Burns Less (With a Catch)
Weight lifting burns fewer calories per minute than most cardio. A typical weight training session burns 180 to 500 calories per hour, and a 45-minute routine with compound lifts like squats, deadlifts, and bench presses usually lands around 250 to 350 calories. General, lighter lifting burns considerably less: only about 108 calories per 30 minutes for a 155-pound person. Vigorous lifting doubles that to 216 calories.
Circuit training narrows the gap with cardio by cutting rest periods between exercises. When you move quickly from one lift to the next, your heart rate stays elevated and you burn more calories in less time. This style blends resistance training with cardio-like pacing and pushes calorie burn toward the higher end of that 180 to 500 range.
Strength training also builds muscle over time, and muscle tissue burns more calories at rest than fat tissue does. So while a lifting session burns fewer calories in the moment compared to a run, the long-term metabolic payoff can be meaningful.
HIIT vs. Steady-State Cardio
High-intensity interval training gets a lot of attention for calorie burning, and the reputation is partially deserved. A 45-minute steady-state cardio session (think jogging at a comfortable pace) typically burns more total calories than a 20-minute HIIT session simply because it’s longer. But when you compare HIIT and steady-state cardio over the same time period, HIIT burns somewhat more calories overall.
Part of that advantage comes from the “afterburn effect,” where your metabolism stays elevated for hours after a high-intensity session. Your body continues consuming extra oxygen to recover, repair muscle tissue, and restore energy stores. This post-exercise calorie burn is noticeably higher after HIIT than after moderate steady-state exercise. It won’t double your total, but it does add a meaningful bump that partially offsets the calorie advantage of longer, easier sessions.
Your Fitness Tracker Is Probably Wrong
If you’re relying on a smartwatch or fitness tracker to answer this question for you, be cautious. Calorie estimates from wrist-worn devices carry significant error, ranging from 27% to 93% off in research testing. The most accurate device in one study (a Fitbit Surge) still overestimated by 27%. The worst performer nearly doubled the actual calorie burn.
Accuracy also depends on the activity. Walking and running estimates averaged about 31% error, which is at least in the ballpark. Cycling estimates were far worse, averaging 52% error. If your watch says you burned 400 calories on the bike, the real number could be closer to 260.
These devices are better at tracking relative effort (a harder workout will show higher than an easier one) than absolute calorie counts. Use them to compare your workouts to each other rather than trusting the exact number.
Realistic Ranges for Common Workouts
Putting it all together, here’s what a 155-pound person can realistically expect from some common workout formats, based on Harvard Health data and typical session lengths:
- 30-minute jog (5 mph): ~288 calories
- 45-minute elliptical session: ~486 calories
- 60-minute yoga class: ~288 calories
- 45-minute weight training (compound lifts): 250–350 calories
- 30-minute high-impact aerobics class: ~252 calories
- 30-minute stationary rowing (moderate): ~252 calories
- 45-minute brisk walk (4 mph): ~263 calories
If you weigh less, subtract roughly 20%. If you weigh more, add roughly 20%. And if you’re working at a genuinely vigorous intensity rather than a moderate one, bump the estimate up by 30% to 50%. The “good workout” sweet spot for most people falls in that 200 to 500 calorie range per session, with the exact number shaped by how big you are, how hard you go, and how long you keep at it.