A standard forearm plank burns roughly 2 to 5 calories per minute, depending on your body weight. At 150 pounds, expect about 3 to 4 calories per minute. At 175 pounds or more, that rises to 4 to 5. A lighter person around 110 pounds burns closer to 2 calories per minute. That means a one-minute plank is a modest calorie burner, and even a grueling three-minute hold only adds up to about 6 to 15 calories total.
Those numbers might feel disappointing if you’ve ever shaken your way through a long plank. But calorie burn isn’t the whole story of why planks are worth doing. Here’s what shapes those numbers and how to get more out of the exercise.
Why Planks Burn Fewer Calories Than You’d Expect
A plank is an isometric exercise, meaning your muscles are working hard but nothing is actually moving. Your core, shoulders, glutes, and quads all fire to keep your body rigid, and that sustained tension requires energy. Your muscles consume ATP (the body’s fuel molecule) to maintain force even without motion. But because there’s no repetitive movement cycling large muscle groups through a full range of motion, the overall energy demand stays low compared to dynamic exercises like running, jumping, or even pushups.
Research on isometric muscle contractions shows that metabolic cost scales in a non-linear way with how much force you produce. In practical terms, this means that as a plank gets harder (because you’re fatigued, heavier, or adding resistance), the calorie cost per second does climb, but not as steeply as it would if you were performing explosive, full-body movements. The plank’s energy signature is more like a low, steady hum than a spike.
Body Weight Is the Biggest Factor
Your body weight is the single largest variable in plank calorie burn. A heavier person has to stabilize more mass against gravity, which demands more muscular force and therefore more energy. The approximate breakdown:
- 110 lbs: ~2 calories per minute
- 150 lbs: ~3 to 4 calories per minute
- 175 lbs or more: ~4 to 5 calories per minute
These are estimates for a standard forearm plank held with proper form. If your hips sag or your weight shifts back toward your toes, you’re offloading your core and likely burning slightly less. A tight, fully engaged plank where your body forms a straight line from head to heels demands the most from your muscles and sits at the higher end of these ranges.
Does Holding Longer Burn More?
Yes, but with diminishing returns in a practical sense. The per-minute calorie rate stays relatively consistent throughout a hold, so a two-minute plank burns roughly twice what a one-minute plank does. The issue is that most people top out somewhere between one and three minutes. Even well-trained athletes rarely hold a plank beyond five minutes in a typical workout. At 4 calories per minute, a heroic five-minute hold totals about 20 calories, which is less than you’d burn in two minutes of brisk jogging.
The real limit isn’t your metabolism; it’s your muscular endurance. Once your core fatigues and your form breaks down, the exercise stops being effective regardless of the calorie math. If you can hold a standard plank comfortably for over two minutes, increasing the difficulty is a better strategy than simply holding longer.
Plank Variations That Increase the Burn
Not all planks are created equal. Several modifications recruit more muscle mass or add instability, both of which drive up energy expenditure beyond what a basic forearm plank requires.
Side planks shift the load to your obliques and the shoulder of your supporting arm. Because you’re balancing on fewer contact points (one forearm and the side of one foot), your stabilizer muscles work harder to prevent you from rolling. This generally translates to a slightly higher calorie cost per minute than a standard front plank, though precise figures depend on your weight and fitness level.
Plank variations with movement push the calorie burn higher still. Plank shoulder taps, plank jacks (jumping your feet wide and back together), and mountain climbers all start from a plank position but add dynamic motion. These variations bridge the gap between isometric holds and traditional cardio exercises. Mountain climbers, for example, can burn two to three times what a static plank does because they cycle your legs rapidly and elevate your heart rate.
Weighted planks, where you place a weight plate on your upper back, force your muscles to stabilize against a heavier load. Since metabolic cost increases with the force your muscles produce, adding even 10 to 25 pounds meaningfully raises the energy demand. This approach also builds core strength faster than unweighted holds.
How Planks Compare to Other Exercises
If your primary goal is burning calories, planks rank near the bottom of common exercises. For a 150-pound person, here’s roughly how a one-minute plank stacks up against one minute of other activities:
- Plank: 3 to 4 calories
- Crunches (moderate pace): 5 to 8 calories
- Pushups (moderate pace): 7 to 10 calories
- Jumping jacks: 8 to 12 calories
- Running (6 mph): 10 to 13 calories
- Burpees: 10 to 15 calories
Dynamic exercises win on calorie burn because they involve repeated contractions of large muscle groups and push your heart rate higher. Even basic crunches, which target a similar area, burn more per minute simply because they involve movement through a full range of motion.
The Real Reason to Plank
Planks aren’t a calorie-torching exercise, and that’s fine. Their value lies elsewhere. A plank trains your deep core stabilizers, the muscles that protect your spine during everyday movements like lifting, bending, and carrying. It also strengthens your shoulders, improves posture, and builds the kind of endurance that transfers to nearly every other exercise you do.
Think of planks as an investment in structural integrity rather than a tool for weight loss. A stronger core lets you run faster, lift heavier, and move with less risk of injury. Those activities, done with a more capable body, are what ultimately drive meaningful calorie expenditure over time. If you want to burn more calories during your core work specifically, mix static planks with dynamic variations like mountain climbers or plank walkouts, and treat the hold itself as one piece of a larger routine rather than the centerpiece.