How Many Calories Does Aerobics Burn?

Aerobics calories by weight & duration

The ~492 calories per hour figure is an estimate for a 155 lb person and your actual number will shift based on your weight, fitness level, and how intensely you move through the class. You can log your aerobics sessions in the Mariposas app to track your personal calorie burn over time and see how your output changes as your fitness improves.

Calculated as MET (7) × body weight (kg) × hours. How this works.

What to expect in a aerobics class

A typical first session opens with a few minutes of lower-intensity movement to warm the joints and get blood moving, then climbs into the main block where you'll cycle through routines of steps, kicks, arm movements, and directional changes, all timed to the beat. Instructors generally build combinations gradually, teaching a move, repeating it, then layering the next one on top, so even if you fall behind on a pattern, you can jump back in quickly. The cool-down at the end usually involves slower movement and some standing stretches. Expect to feel a little lost with the footwork during the first session or two before muscle memory kicks in.

Tips for your first aerobics class

• Stand somewhere mid-room rather than the back row. You'll be able to watch both the instructor and other participants, which helps you pick up patterns faster than staring at the back of someone's head.
• Focus on the feet first and let the arms come later. Instructors teach combinations in layers, and trying to nail footwork and arm patterns simultaneously when you're new leads to frustration. Get the lower body pattern solid, then add the arms.
• Wear cross-training shoes rather than running shoes. Running shoes are built for forward motion and can restrict the lateral movement and pivoting that aerobics requires, which creates unnecessary strain on your ankles and knees.
• Low-impact modifications, like stepping instead of jumping, are always available and are not a sign of weakness. Using them in your first few classes lets you build the coordination and conditioning to add impact later without burning out or risking a rolled ankle.

What affects how many calories aerobics burns

The 492 calorie figure is calculated for a 155 lb person working at a MET of 7, which reflects moderate-to-vigorous aerobics effort. A heavier person will burn more per hour at the same effort level, while a lighter person will burn less, since calorie expenditure scales directly with body weight. How hard you push your arms, how big you make your movements, and whether the class incorporates higher-impact variations like jumping or plyometric sequences will all pull your actual burn higher or lower than the estimate.

Three things move your number most: body weight (a heavier body burns more for the same activity, that's why the table runs from 125 to 225 lb), duration (calories scale with time), and intensity. A aerobics you push hard burns more than an easy one, because effort is what the MET value of 7 represents, an average for this activity. Your fitness level and how much you rest between efforts shift it too, so treat these as a solid estimate rather than an exact count.

How we calculate aerobics calories

Every number here uses the standard energy-expenditure formula: calories ≈ MET × body weight (kg) × time (hours). The MET value of 7 for aerobics comes from the published Compendium of Physical Activities, the same reference researchers and fitness trackers use. We convert your weight to kilograms and multiply through, no fudge factors. See our methodology for the full formula and sources.