Where your combined rating lands
The pointer is your exact combined value; the label shows the rating after rounding to the nearest 10%.
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VA Disability Rating Calculator
Combine multiple VA disability ratings the way the VA actually does it, with whole-person math, not simple addition, and see your combined rating rounded to the nearest 10%.
Combined rating (rounded)
70%
Exact combined value—
Ratings entered—
Simple sum (not used by VA)—
What is a combined VA disability rating?
A combined disability rating is the single percentage the U.S. Department of Veterans Affairs assigns when a veteran has more than one service-connected condition. It is not the sum of the individual ratings. Instead, the VA treats a healthy person as 100% efficient and reduces that efficiency by each disability in turn, so each additional rating counts for a little less than the last.
The formula
Sort ratings from highest to lowest.
efficiency = 100% − rating₁
remaining disability = rating₂ × efficiency ÷ 100, and so on
combined = 100 − (100 × ∏(1 − ratingᵢ/100))
Final rating = combined rounded to the nearest 10%
efficiency = 100% − rating₁
remaining disability = rating₂ × efficiency ÷ 100, and so on
combined = 100 − (100 × ∏(1 − ratingᵢ/100))
Final rating = combined rounded to the nearest 10%
Worked example
Say you have a 50% and a 30% rating:
| Step | Value |
|---|---|
| Start with the 50% rating | 50% disabled, 50% efficient |
| Apply 30% to the remaining 50% | 30% × 50 = 15% |
| Combined (50 + 15) | 65% |
| Rounded to nearest 10% | 70% |
Note: this tool does not add the 10% bilateral factor that applies when both arms, both legs, or paired muscle groups are affected. Add that separately if it applies to you.
Frequently asked questions
How does the VA combine disability ratings?
With whole-person math: start at 100% efficiency, subtract the highest rating, apply each remaining rating to what is left, then round to the nearest 10%.
Why is 50% + 30% not 80%?
The 30% applies only to the 50% efficiency remaining after the first rating, that is 15%, for a combined 65% (rounded to 70%).
How is the combined rating rounded?
To the nearest 10%. 64% rounds to 60%; 65% rounds to 70%.
What is the bilateral factor?
An extra 10% the VA adds for disabilities affecting both arms, both legs, or paired muscles, applied before combining. This tool does not add it automatically.
Does a higher combined rating mean more pay?
Compensation is based on the rounded rating and your dependents, so crossing into the next 10% bracket can increase your monthly payment.