Calculate your combined disability rating using the "VA Math" method.
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100%
Combined Raw Score: 0%
Official VA Rating: 0%
*Official ratings are rounded to the nearest 10%.
How Does VA Disability Math Work?
The Department of Veterans Affairs (VA) uses a unique method called the "Combined Rating Table" to determine a veteran's total disability percentage. Unlike standard addition, where 50% plus 50% equals 100%, VA math recognizes that a person cannot be more than 100% disabled.
The process works by calculating the "remaining efficiency" of a veteran. If you have a 50% disability, you are considered 50% "efficient." If you have a second disability of 30%, the VA takes 30% of that remaining 50% efficiency (which is 15%) and adds it to the initial 50%, resulting in a 65% total disability score.
Steps to Calculate Your Combined Rating
Rank Disabilities: List your service-connected disabilities from highest percentage to lowest.
Start with 100%: Begin with 100% "efficiency."
Subtract Highest First: Take your highest rating and subtract it from 100. (e.g., 100 – 50% = 50% remaining).
Calculate Subsequent Ratings: Take the next highest rating and apply it to the remaining balance.
Repeat: Continue until all ratings are applied.
Round: Round the final number to the nearest 10%. (4.9 rounds down to 0, 5.0 rounds up to 10).
Example Calculation
Disability
Rating
Remaining Efficiency
Calculation
Initial Health
–
100%
Start point
PTSD
50%
50%
50% of 100 = 50
Tinnitus
10%
45%
10% of 50 = 5. New total = 55
Final
60%
–
55 rounded up to 60
Bilateral Factor
If you have disabilities affecting both arms or both legs, a "Bilateral Factor" may apply. This adds an additional 10% of the combined value of those specific disabilities before they are combined with other non-bilateral ratings. This calculator provides a base calculation; complex bilateral cases may require additional adjustments.
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newRow.className = 'va-input-row';
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function calculateVARating() {
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// Sort ratings descending (highest first)
ratings.sort(function(a, b) { return b – a; });
var currentEfficiency = 100;
var totalDisability = 0;
for (var j = 0; j 100) finalRating = 100;
if (rawScore > 100) rawScore = 100;
document.getElementById('raw-score').innerText = rawScore;
document.getElementById('final-rating').innerText = finalRating;
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