Army Med Board Calculator: Estimate Your Rating

The Army Med Board Calculator estimates the likely disability rating percentage a soldier may receive from the Integrated Disability Evaluation System (IDES) based on their diagnosed conditions and the VA’s rating schedule. You enter your unfitting conditions and their severity, and the calculator returns a combined disability rating, which determines your separation benefits and retired pay eligibility. This tool is an estimate only — the actual rating is decided by the PEB and VA after reviewing your complete medical records.

Formula

The combined rating is calculated using the VA’s whole-person formula, not simple addition. Each condition is rated from 0% to 100% in increments of 10 (except for certain conditions like tinnitus, which is 10% only). The formula is:

Combined Rating = 100 × (1 – �(1 – r_i/100))

where r_i is the rating for each condition i, and the product is taken over all conditions. The result is rounded to the nearest 10% (the VA rounds to the nearest whole number, then to the nearest 10 for the final combined rating). For example, two conditions rated 50% and 30% combine as: 100 – (50 × 70) = 100 – 35 = 65%, which rounds to 70% (since 65 rounds up to 70).

Worked Example

Using the default values from the calculator: Condition 1 = 10%, Condition 2 = 10%, Conditions 3–5 = 0%.

1. Start with 100% (whole person).
2. For condition 1: 100 – 10 = 90% remaining efficiency.
3. For condition 2: 90 × (100 – 10)/100 = 90 × 0.9 = 81% remaining.
4. For conditions 3–5: multiply by 1.0 (no change).
5. Combined disability = 100 – 81 = 19%, which rounds to 20%.

The calculator shows 20% for the defaults, as expected.

How the Army Med Board Process Works

The Med Board (officially the Integrated Disability Evaluation System, or IDES) starts when a soldier’s medical condition prevents them from performing their duties. The process involves:

• Medical Evaluation Board (MEB): A physician reviews your records and determines if you meet retention standards (AR 40-501). If not, you’re referred to the PEB.
• Physical Evaluation Board (PEB): The PEB decides if you’re fit for duty. If unfit, they assign a disability rating based on the VA’s schedule.
• VA Rating: The VA provides a proposed rating for each condition, which the PEB uses to determine your final DoD rating.

The calculator models the VA’s combined rating formula, which is the core of the PEB’s rating. However, the PEB only rates conditions that are “unfitting� (i.e., those that prevented you from doing your job), while the VA rates all service-connected conditions. Your total DoD rating may differ from your VA rating if you have conditions the VA rates but the PEB does not.

How to Use the Calculator for Your Case

To get a realistic estimate, you need to know the likely rating for each condition. The VA rates conditions based on severity, not diagnosis alone. For example:

• Back pain (degenerative disc disease): Ratings range from 10% (mild) to 60% (severe with incapacitating episodes).
• PTSD: Ratings from 0% to 100% based on social and occupational impairment.
• Tinnitus: Fixed at 10%.
• Migraines: 0% to 50% based on frequency and severity.

You can find the exact criteria in the VA’s Schedule for Rating Disabilities (38 CFR Part 4). Enter the percentage you believe matches your symptoms. If you have more than five conditions, combine the first five, then combine that result with the sixth using the same formula manually.

Common Mistakes and Misconceptions

One major mistake is adding ratings together (e.g., 50% + 30% = 80%). The VA’s formula always gives a lower result because it accounts for the fact that a person with 50% disability still has 50% of their body “whole.� Another misconception is that a 0% rating means no disability — it actually means the condition is service-connected but not severe enough to warrant compensation, yet it still qualifies for VA healthcare.

Also, the calculator uses the VA’s rounding rule: the final combined percentage is rounded to the nearest 10% (e.g., 65% becomes 70%). The calculator rounds the result to the nearest whole number first, which is correct for the final step.

Finally, the PEB may apply a “combat-related� special rule if your condition is combat-related, which can affect tax-free benefits but not the percentage itself. The calculator does not account for this.

Limitations of the Calculator

This tool only computes the mathematical combination of ratings. It does not:

• Determine whether a condition is unfitting (that’s the PEB’s decision).
• Account for bilateral factors (e.g., if you have conditions on both arms, the VA adds 10% to the combined value before rounding).
• Include temporary ratings, such as for convalescence after surgery.
• Reflect the difference between DoD and VA ratings — the DoD only rates unfitting conditions, so your DoD rating may be lower than your VA rating.

For a complete estimate, you need to know which conditions the PEB will consider unfitting. The calculator is most accurate when you enter only those conditions.

What Your Rating Means for Benefits

Your combined rating affects your separation benefits:

• 0–20%: Typically a severance pay (one-time payment) if separated, unless you’re retired under other rules.
• 30–100%: Medical retirement with monthly retired pay (based on years of service or the rating, whichever is higher) and TRICARE benefits.
• 100%: Full retirement pay and additional allowances (e.g., special monthly compensation if you meet certain criteria).

The exact pay calculation depends on your years of service and retirement plan (e.g., High-36 or BRS). The calculator does not compute pay — it only gives the rating percentage.

Frequently Asked Questions

How long does an Army med board take?

The IDES process typically takes 3 to 6 months, but it can be longer depending on the complexity of your case, the availability of medical appointments, and the workload of the PEB. The MEB phase usually takes 1–2 months, and the PEB phase another 1–3 months.

Can I appeal a med board rating?

Yes, you can appeal the PEB’s decision. You have the right to request a formal PEB hearing (if you’re an officer) or a review by a different board. You can also appeal the VA’s rating through the VA’s appeals process after separation. The calculator can help you see what a fair rating should be, but the final decision is up to the board.

Does the med board rating match the VA rating?

Not always. The PEB rates only unfitting conditions, while the VA rates all service-connected conditions. For example, if you have a 30% knee condition that is unfitting and a 10% tinnitus condition that is not unfitting, your DoD rating is 30%, but your VA rating could be 40% (combined). The calculator works for both if you enter the appropriate conditions.

What is the difference between 20% and 30%?

The threshold is critical because 30% qualifies for medical retirement, while 20% or less results in severance pay (unless you have 20+ years of service). A 30% rating also gives you TRICARE benefits for life. The calculator helps you see how close you are to that threshold.

Can I use the calculator for a VA claim?

Yes, the same formula is used for VA disability claims. You can enter your VA-rated conditions to see your combined VA rating. However, the VA also applies bilateral factors and other special rules that the calculator does not handle, so the result may be slightly different for complex cases.

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in cond1 | Condition 1 Rating | % | 10 | 0 | 100
in cond2 | Condition 2 Rating | % | 10 | 0 | 100
in cond3 | Condition 3 Rating | % | 0 | 0 | 100
in cond4 | Condition 4 Rating | % | 0 | 0 | 100
in cond5 | Condition 5 Rating | % | 0 | 0 | 100
out combined | Combined Rating | % | 100 - round((100-cond1)/100*(100-cond2)/100*(100-cond3)/100*(100-cond4)/100*(100-cond5)/100*100, 0) | 0