Combined Rating Calculator
The Combined Rating Calculator helps you combine two to five percentage ratings into a single result. It includes three selectable calculation methods: VA Combined Ratings, Simple Average, and Weighted Average. The tool also displays a rounded rating, number of ratings included, a decimal factor, and the calculation method used.
This is especially useful for understanding why multiple VA disability percentages are not normally added together using ordinary arithmetic. For example, two 50% ratings do not produce a 100% combined disability rating under the VA's "whole person" approach.
You can also select Simple Average when you need the arithmetic mean of several percentages.
Important: This calculator is an informational estimation tool. An official Department of Veterans Affairs combined disability rating can involve VA rules and procedures beyond a basic percentage combination, including the bilateral factor and other considerations. Use an official VA decision or current VA resources to verify benefit-related calculations.
How to Use the Combined Rating Calculator
Enter at least two percentage ratings to begin. The first two fields are required, while Ratings 3, 4, and 5 are optional.
Use the calculator as follows:
- Enter Rating 1 as a percentage.
- Enter Rating 2 as a percentage.
- Add Ratings 3, 4, and 5 if you have additional percentages.
- Select VA Combined Ratings, Simple Average, or Weighted Average.
- Click Calculate.
- Review the combined rating, rounded rating, number of ratings, displayed factor, and calculation method.
- Click Reset to start a new calculation.
When using the VA Combined Ratings method, the calculator arranges the included ratings from highest to lowest before combining them.
Understanding the Calculator Results
After calculation, the tool displays several results.
The Combined Rating is the percentage generated by the selected calculation method. It is shown to one decimal place.
The Rounded Rating takes that calculated percentage and rounds it mathematically to the nearest multiple of 10.
The Number of Ratings tells you how many percentages were included. Optional ratings greater than zero are counted.
The Bilateral Factor field in this tool displays the combined result divided by 100. For example, a combined rating of 68.0% produces 0.68.
It is important to note that this displayed value is not the same thing as the official VA bilateral factor calculation described in 38 CFR § 4.26. If you are determining an actual VA disability rating involving paired extremities or paired skeletal muscles, an official bilateral-factor calculation requires additional information this tool does not collect.
Finally, Calculation Method identifies which method was selected.
How VA Combined Ratings Work
VA disability percentages generally are not combined by simply adding them. The concept is based on the portion of a person that remains efficient after each disability percentage is considered.
For example, suppose you have ratings of 50% and 30%.
Starting with a 50% rating means 50% remains unaffected for purposes of the combination. The next 30% is applied to that remaining 50%.
30% of 50 is 15.
That produces:
50 + 15 = 65%
This calculator displays a combined rating of 65.0% and then rounds it to 70%.
This explains why adding 50% + 30% and obtaining 80% does not reflect the VA-style combination approach.
Combined Rating Example With Three Percentages
Suppose you enter disability ratings of 50%, 30%, and 20%.
The calculator first considers the highest rating, 50%. There is 50% remaining.
The 30% rating is applied to the remaining 50%:
50 + (50 × 0.30) = 65%
There is now 35% remaining. The 20% rating is applied to that remaining amount:
65 + (35 × 0.20) = 72%
The calculator therefore produces a combined value of 72.0%. Its final nearest-10 rounding produces 70%.
This example illustrates an important feature of combined ratings: each additional percentage has a progressively smaller portion of the remaining efficiency to affect.
Why VA Disability Ratings Are Not Simply Added
Adding percentages directly could quickly produce totals greater than 100%. The whole-person concept avoids that problem.
Suppose someone has two 60% ratings. Simple addition would produce 120%, which is not an appropriate whole-person percentage.
Using the combined method, the first 60% leaves 40% remaining. The second 60% applies to that remaining 40:
60% of 40 = 24
Adding 24 to the original 60 gives 84%.
The difference between simple addition and combined percentages becomes increasingly important when several disability ratings are involved.
VA Combined Rating vs. Simple Average
The Simple Average option performs a completely different calculation.
For example, consider ratings of 60%, 40%, and 20%. A simple average is:
(60 + 40 + 20) ÷ 3 = 40%
The VA-style calculation does not average these percentages. It sequentially applies each percentage to the remaining efficiency.
You should therefore select the calculation method according to the question you are trying to answer. Simple averages should not be interpreted as official VA combined disability ratings.
Understanding the "Weighted Average" Option
The calculator includes an option labeled Weighted Average. However, users should understand what this particular option does before relying on it.
In the current calculator, the Weighted Average option uses the same sequential remaining-efficiency calculation as the VA Combined Ratings option. It does not ask for separate statistical weights, such as a weight of 20%, 30%, or 50% for individual values.
As a result, selecting Weighted Average will currently produce the same numerical combined percentage as selecting VA Combined Ratings for the same inputs.
For a conventional weighted average, individual weights would need to be provided for each rating.
How Does Combined Rating Rounding Work?
The tool rounds its calculated combined percentage to the nearest multiple of 10 using standard mathematical rounding.
For example, a calculated value of 72% displays a rounded result of 70%, while 75% produces 80%.
For official VA determinations, however, the sequence and timing of whole-number conversion, bilateral-factor application when applicable, and final conversion to a degree divisible by 10 can matter. Because this calculator retains decimal precision during its sequential calculation, its result can differ from an official VA combined-rating determination in some cases.
For benefits decisions, verify your result against the current VA combined ratings table and applicable VA rules.
What Is the VA Whole Person Concept?
The whole person concept considers disability percentages against the portion of a person that remains efficient rather than simply adding every rating.
Consider ratings of 40% and 20%. After the first 40% rating, 60% remains. Applying 20% to the remaining 60 gives 12 percentage points.
The resulting combined value is:
40 + 12 = 52%
The calculator would then display a rounded value of 50%.
The approach ensures that sequential combinations mathematically remain at or below 100%.
Can Multiple Ratings Reach 100%?
Multiple ratings can produce an increasingly high combined value, but each additional percentage is applied to a smaller remaining amount.
For example, after a combined value reaches 90%, only 10% remains. A new 50% rating applied to that remaining amount contributes 5 percentage points, creating a calculated result of 95%.
The calculator would round 95% to 100%.
Official VA ratings should still be determined under the applicable VA rules rather than from this calculator alone.
What Is the VA Bilateral Factor?
The official VA bilateral factor can apply when compensable disabilities affect paired areas, such as both arms, both legs, or paired skeletal muscles, subject to the requirements in VA regulations.
The bilateral factor is more complicated than converting a combined percentage into decimal form. The affected disabilities must first be appropriately combined, and 10% of that combined value is added before further combinations, subject to the governing rules.
This calculator does not ask which conditions affect paired extremities or muscles. Therefore, the result labeled "Bilateral Factor" should not be used as an official VA bilateral factor.
That distinction is particularly important when estimating a veteran's official combined disability evaluation.
Tips for Using a Combined Rating Calculator
Enter each percentage carefully and choose the method that matches your purpose. When estimating a VA combined rating, remember that VA calculations can involve more than simply combining raw percentages.
Optional fields can be left empty. In the current tool, optional ratings of 0% are not added to the number of ratings, which does not affect the combined percentage.
For an official benefits estimate, consider the bilateral factor where applicable and verify current regulations and the VA Combined Ratings Table. VA disability rules and individual cases can involve details that a general calculator cannot determine from percentages alone.
Frequently Asked Questions
1. What is a Combined Rating Calculator?
A Combined Rating Calculator combines multiple percentages into a single result. This tool supports up to five ratings and provides VA-style combination and simple-average options.
2. How many ratings can I enter?
You can enter up to five ratings. Ratings 1 and 2 are required, while Ratings 3, 4, and 5 are optional.
3. Can I use this as a VA disability calculator?
You can use the VA Combined Ratings option as an informational estimate of the whole-person combination approach. It should not replace an official VA determination.
4. Why aren't VA disability ratings simply added together?
VA combined ratings use a whole-person approach in which later percentages apply to the remaining efficiency after higher ratings have been considered.
5. What do 50% and 30% combine to?
Using the calculator's VA method, 50% leaves 50% remaining. Applying 30% to that remainder adds 15 percentage points, producing 65.0%, which the tool rounds to 70%.
6. What do 50%, 30%, and 20% combine to?
Using this calculator's VA-style method, 50%, 30%, and 20% combine to 72.0%, with a displayed rounded rating of 70%.
7. Does the order of ratings matter?
The calculator sorts included ratings from highest to lowest before calculation. For the sequential formula used here, the underlying unrounded mathematical result is also independent of order.
8. What is a simple average rating?
A simple average adds all included percentages and divides the sum by the number of ratings. It is different from the VA combined-ratings method.
9. What does the Weighted Average option do?
In this tool, Weighted Average currently uses the same remaining-efficiency formula as VA Combined Ratings. It does not use separately entered statistical weights.
10. How is the rounded rating calculated?
The calculator rounds the computed percentage to the nearest multiple of 10. For example, 65% becomes 70%.
11. Is the displayed Bilateral Factor the official VA bilateral factor?
No. This field simply displays the calculated combined rating divided by 100. The official VA bilateral factor under 38 CFR § 4.26 requires additional information and a different calculation.
12. Can a combined rating exceed 100%?
The calculator's VA-style sequential method does not exceed 100%, because each additional rating is applied only to the percentage that remains.
13. Can I enter a 0% rating?
The required first two fields can accept 0. Optional ratings are only included when they are greater than zero.
14. Why might this calculator differ from an official VA rating?
Official VA calculations may use the Combined Ratings Table, whole-number values at intermediate stages, applicable bilateral factors, and other rules. This calculator performs its sequential calculation with decimal precision and only rounds the final result.
15. Is this calculator an official VA tool?
No. It is an independent informational calculator. For an official disability evaluation or compensation determination, rely on your VA rating decision and current information from the U.S. Department of Veterans Affairs