What is the normal plantarflexion ROM of the ankle?

• A. 40 degrees
• B. 20 degrees
• C. 60 degrees
• D. 30 degrees

Answer: (A)

Plantarflexion ROM is how far you can point the toes downward. In a healthy ankle, the usual end range is about 40 to 50 degrees, with 40 degrees commonly cited as the standard normal value. That makes 40 degrees the best match among the options. Values around 60 degrees are higher than typical normal and may reflect variability in measurement or lax joints, while 30 degrees is a bit below the common normative range. Also note that the knee position can affect the measurement because the gastrocnemius crosses the knee, but 40 degrees remains a standard reference for normal plantarflexion.