Key Takeaways
- Planks are isometric holds — calories accumulate with time, not repetitions. A 60-second forearm plank (3.5 MET) burns approximately 4.3 kcal for a 70 kg person.[1]
- Dynamic plank variations like shoulder taps (4.5 MET) and walkouts (5.0 MET) burn 29-43% more than static forearm planks.[4]
- Side planks (3.8 MET) require unilateral stabilization, which slightly increases energy demand compared to bilateral forearm planks.[5]
- Multi-set plank sessions with rest periods still contribute rest-phase calories at 1.0 MET.
- These are informational estimates for personal journaling. Individual results vary with form and body composition.
Quick Plank Calorie Charts
Estimated kcal for a 60-second hold. For informational reference only.
| Variation | MET | 55 kg | 70 kg | 85 kg | 100 kg |
|---|---|---|---|---|---|
| Standard Forearm Plank | 3.5 | 3.4 | 4.3 | 5.2 | 6.1 |
| High Plank (Push-Up Position) | 3 | 2.9 | 3.7 | 4.5 | 5.3 |
| Side Plank | 3.8 | 3.7 | 4.7 | 5.7 | 6.7 |
| Plank with Shoulder Taps | 4.5 | 4.3 | 5.5 | 6.7 | 7.9 |
| Plank with Leg Raise | 4 | 3.9 | 4.9 | 6.0 | 7.0 |
| Plank with Hip Dips | 4.5 | 4.3 | 5.5 | 6.7 | 7.9 |
| Weighted Plank | 4.5 | 4.3 | 5.5 | 6.7 | 7.9 |
| Plank Walkout / Inchworm | 5 | 4.8 | 6.1 | 7.4 | 8.8 |
| Reverse Plank | 3.5 | 3.4 | 4.3 | 5.2 | 6.1 |
| Copenhagen Plank | 4 | 3.9 | 4.9 | 6.0 | 7.0 |
How the Estimate Works
The calculator converts hold duration from seconds to minutes and applies the MET formula:[1]
Calories = (MET × 3.5 × Wt_kg × Duration_min) ÷ 200
In multi-set mode, hold durations are summed for total work time, and rest periods are calculated at resting MET (1.0).
Plank Variations Explained
Standard Forearm Plank (3.5 MET)
The baseline plank position with elbows on the floor. Engages the full anterior core chain as an isometric hold. The Compendium lists planks under light calisthenics (2.8 MET, code 02024); we use 3.5 MET (code 02030, light-to-moderate) to reflect sustained isometric effort beyond brief curl-ups.[1]
Side Plank (3.8 MET)
Unilateral lateral hold targeting the obliques and quadratus lumborum. Slightly higher MET due to single-arm stabilization demands.[5]
Shoulder Taps & Hip Dips (4.5 MET)
Dynamic variations that add movement to the static plank position. Shoulder taps involve anti-rotation, while hip dips add lateral rotation.[6]
Plank Walkout / Inchworm (5.0 MET)
Walk hands out from standing to plank and back. The most dynamic variation, combining hip flexion, shoulder extension, and core stabilization.[4]
Copenhagen Plank (4.0 MET)
Side plank with the top leg elevated on a bench. Adds adductor engagement for higher overall effort compared to standard side planks.[7]
Weighted Plank (4.5 MET)
Standard forearm or high plank with a weighted vest or plate on the back. External load increases core stabilization demands.[3]
Hold Duration Guide
Plank duration determines total calorie expenditure linearly — doubling hold time doubles the calorie estimate:
- 30 seconds: Beginner-level hold. Brief but effective for form practice.
- 60 seconds: Standard training hold for most intermediate users.
- 90-120 seconds: Advanced hold duration. Core fatigue becomes a significant factor.
- 180+ seconds: Extended holds require substantial endurance and stability.
Frequently Asked Questions
Sources & References
- Conditioning Exercise - Compendium of Physical Activities. Compendium of Physical Activities. PAC Compendium (2024)
- Abdominal exercise physiology. PMC. PMC (2025)
- Exercise energy expenditure. PMC. PMC (2019)
- Plank exercise analysis. PMC. PMC (2024)
- Strength and Balance Improvement with Plank Exercise Variations. ResearchGate. ResearchGate (2023)
- Effects of High Intensity Plank Exercise. ResearchGate. ResearchGate (2021)
- Plank exercise reference. Physio-pedia. Physio-pedia (2024)
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This tool is for informational and journaling purposes only.
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