What is the ACFT Plank (PLK) Score Calculator?
This calculator converts your Army Combat Fitness Test (ACFT) Plank (PLK) hold time into a points score from 0 to 100. The Plank replaced the Leg Tuck as the core-strength event for the U.S. Army's ACFT. This tool is specific to the United States Army ACFT scoring scale. The 60-point passing standard corresponds to a 0:40 (40-second) hold, while the maximum 100 points is reached at a 3:35 (215-second) hold.
How to use it
Enter the minutes and seconds you held the plank position with proper form. The calculator combines them into total seconds, maps that time onto the scoring scale, rounds to the nearest whole point, and clamps the result between 0 and 100. A hold under 40 seconds fails the event (under 60 points).
The formula explained
Total hold time in seconds is interpolated against two anchor segments. For 0–40 seconds, points scale linearly from 0 to 60. For 40–215 seconds, points scale linearly from 60 to 100. Beyond 215 seconds the score is capped at 100.
For the passing segment: $$\text{score} = 60 + (\text{time} - 40) \times \frac{40}{175}$$ rounded and clamped to 0–100.
Worked example
Suppose you hold the plank for 2 minutes and 9 seconds = 129 seconds. Since 129 is between 40 and 215: $$\text{score} = 60 + (129 - 40) \times \frac{40}{175} = 60 + 89 \times 0.22857 = 60 + 20.34 = 80.34,$$ which rounds to 80 points.
What Your Plank Score Means
A score of 60 points is the minimum passing standard on the Plank event, achieved with a hold of at least 40 seconds. Any hold shorter than 40 seconds scores below 60 and is a failing result on this event. Because the Army Combat Fitness Test requires a passing score on every event, failing the Plank means failing the overall test regardless of how well you perform elsewhere.
Keep these points in mind when interpreting your score:
- 60 is the floor, not the goal. Soldiers in physically demanding roles, special programs, or units with their own performance expectations are often encouraged to target well above the minimum—closer to the 80–100 range.
- One of six events. The Plank is one of six ACFT events, alongside the Maximum Deadlift (MDL), Standing Power Throw (SPT), Hand-Release Push-Up (HRP), Sprint-Drag-Carry (SDC), and the Two-Mile Run (2MR). Each event is scored 0–100, and the six scores add together for a maximum total of 600 points.
- Total score matters. A strong Plank score can help offset weaker performance elsewhere, but you must still pass each individual event. Use the full ACFT total score calculator to see how your Plank result combines with the other five events.
This is general information about the ACFT scoring standard and is not official military guidance. Always confirm current minimum standards and any role-specific requirements with your unit and the latest Army regulations.
FAQ
What is the minimum passing time? A 0:40 (40-second) hold earns 60 points, the minimum passing score for most MOS standards.
What time gives a perfect 100? A 3:35 (215-second) hold earns the maximum 100 points; holding longer does not add points.
Is this the official score chart? It is a close linear model of the published scale. Always confirm with your unit's current official ACFT scoring scale, as standards may be updated.
