VA Disability Calculator - Hill and Ponton

Combined Rating Formula:

\[ \text{Combined Rating} = 100\% - \prod(100\% - \text{Each Individual Rating}) \]

Combined Disability Rating:

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is the VA Combined Rating Calculator?

The VA Combined Rating Calculator uses the official VA math formula to determine your total disability percentage when you have multiple service-connected conditions. This follows the Hill and Ponton method which is recognized by the Department of Veterans Affairs.

2. How VA Math Works

The VA doesn't simply add percentages together. Instead, they use a formula that accounts for how disabilities interact:

\[ \text{Combined Rating} = 100\% - \left[(100\% - R_1) \times (100\% - R_2) \times \cdots \times (100\% - R_n)\right] \]

Where:

\( R_1, R_2, \ldots, R_n \) — Individual disability ratings
The result is rounded to the nearest 10%

Example: If you have ratings of 50% and 30%, the calculation would be:
100% - [(100% - 50%) × (100% - 30%)] = 100% - (0.5 × 0.7) = 100% - 0.35 = 65% → rounded to 70%

3. Importance of Accurate Calculation

Details: Your combined rating determines your monthly compensation and eligibility for additional benefits. Even small differences can significantly impact your benefits.

4. Using the Calculator

Tips: Enter each of your individual disability ratings as percentages (without the % sign). You can add as many ratings as needed. The calculator will compute your combined rating using official VA math.

5. Frequently Asked Questions (FAQ)

Q1: Why doesn't VA just add the percentages?
A: The VA system accounts for how multiple disabilities interact, recognizing that two 50% disabilities don't equal 100% disability.

Q2: How does bilateral factor work?
A: Disabilities affecting both arms/legs get an extra 10% of their combined value before being added to other ratings.

Q3: What's the highest combined rating possible?
A: The maximum is 100%, though you can have individual ratings that theoretically sum to much higher when using regular math.

Q4: How are ratings rounded?
A: Final combined ratings are rounded to the nearest 10%. 85%+ rounds to 90%, 84% rounds to 80%.

Q5: Where can I get official rating decisions?
A: Your official combined rating will be listed on your VA rating decision letter.