Enter each of your individual disability ratings below. The calculator uses "VA Math" to determine your combined rating.
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Your Combined VA Rating
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Actual calculated value: –%
How VA Math Works
The Department of Veterans Affairs (VA) doesn't simply add individual disability ratings together. Instead, they use a "Combined Rating Table." The logic treats a veteran as a whole person (100%). If you have a 50% disability, you are considered 50% efficient. Any subsequent ratings are applied to that remaining efficiency.
The Step-by-Step Calculation
Sort: Ratings are ranked from highest to lowest.
Calculate Highest First: A 50% rating leaves you 50% "efficient."
Apply Second Rating: If your second rating is 30%, the VA takes 30% of your *remaining* 50% efficiency (which is 15%).
Combine: Adding that 15% to your initial 50% gives you a combined rating of 65%.
Round: The VA rounds the final result to the nearest 10%. In the 65% example, it rounds up to 70%.
Example Scenario
If a Veteran has three disabilities: 50%, 40%, and 20%.
Step 1: Start with 100% health. Apply 50% rating. Remaining health is 50%. Combined rating is 50%.
Step 2: Apply 40% rating to the remaining 50% health (0.40 x 50 = 20). Combined rating: 50 + 20 = 70%. Remaining health is now 30%.
Step 3: Apply 20% rating to the remaining 30% health (0.20 x 30 = 6). Combined rating: 70 + 6 = 76%.
Final Result: 76% rounds up to 80%.
function addVaRatingField() {
var container = document.getElementById('ratings-list');
var div = document.createElement('div');
div.className = 'rating-input-row';
div.innerHTML = ' %✕';
container.appendChild(div);
}
function calculateVaRating() {
var inputs = document.getElementsByClassName('va-rating-val');
var ratings = [];
for (var i = 0; i 0) {
ratings.push(val);
}
}
if (ratings.length === 0) {
alert('Please enter at least one disability rating.');
return;
}
// VA Math sorts ratings from highest to lowest
ratings.sort(function(a, b) { return b – a; });
var efficiency = 100.0;
var combinedRating = 0.0;
for (var j = 0; j < ratings.length; j++) {
var currentRating = ratings[j];
var reduction = (efficiency * (currentRating / 100.0));
combinedRating += reduction;
efficiency -= reduction;
}
// Rounding logic: VA rounds to the nearest 10%
// .5 and up rounds to the next 10.
var roundedRating = Math.round(combinedRating / 10) * 10;
document.getElementById('final-rounded-val').innerText = roundedRating + '%';
document.getElementById('actual-raw-val').innerText = 'Actual calculated value: ' + combinedRating.toFixed(2) + '%';
document.getElementById('va-result').style.display = 'block';
// Scroll to result
document.getElementById('va-result').scrollIntoView({ behavior: 'smooth', block: 'nearest' });
}