When you have permanent impairments to multiple body parts, the ratings are combined — not simply added — using the AMA Combined Values formula. This calculator shows the combined result and the estimated PPD dollar value.
PPD schedules verified through 2025-10-01.
Rates verified through: 2025-10-01
Combine Multiple PPD Ratings
Enter your PPD ratings for each body part. We'll combine them using the AMA formula and estimate the dollar value.
Verification notice
The AMA Combined Values formula is the standard method under Minn. R. 5223.0300, subp. 3E. Dollar amounts depend on the date of injury and the statutory PPD compensation schedule.
Date of injury
Optional — used to calculate the PPD dollar value from the schedule.
PPD ratings to combine
How PPD combination works
When you have multiple permanent impairments, they are not simply added together. Instead, Minnesota uses the AMA Combined Values formula: each successive rating is applied to the “remaining whole person” — the portion of whole-body function you still have after the previous ratings.
Formula: Combined = 1 − [(1 − A) × (1 − B) × (1 − C) × …]
Example: Two ratings of 10% each combine to 19% (not 20%), because the second 10% is applied to the remaining 90%.
This calculator is for informational purposes only and does not constitute legal advice. Results are estimates based on Minnesota workers' compensation law as of the rates shown. Consult a qualified attorney for advice specific to your situation.
How this works
The AMA Combined Values formula prevents total impairment from exceeding 100%. Each new rating is applied to the remaining “whole person” after previous ratings. For example, a 10% rating followed by another 10% yields 19% combined — the second 10% is applied to the 90% of whole body function remaining after the first.