Enter the blood pressure in the ankle and blood pressure in the arm into the calculator to determine the Ankle-Brachial Index. This calculator can also evaluate any of the variables given the others are known.

## Abi Formula

The following formula is used to calculate the Abi score.

ABI = BPankle / BParm

Variables:

- ABI is the Ankle-Brachial Index BPankle is the blood pressure in the ankle BParm is the blood pressure in the arm

To calculate the Ankle-Brachial Index, divide the blood pressure in the ankle by the blood pressure in the arm. The result is the ABI score, which can help to indicate the risk of peripheral artery disease (PAD).

## How to Calculate Abi?

The following steps outline how to calculate the Ankle-Brachial Index (ABI).

- First, determine the blood pressure in the ankle (BPankle).
- Next, determine the blood pressure in the arm (BParm).
- Next, gather the formula from above = ABI = BPankle / BParm.
- Finally, calculate the Ankle-Brachial Index (ABI).
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem:**

Use the following variables as an example problem to test your knowledge.

Blood pressure in the ankle (BPankle) = 120

Blood pressure in the arm (BParm) = 140