Functional Capacity Calculator
Evaluate physical work capacity based on lifting, carrying, standing, walking, and sitting tolerances using DOL physical demand levels.
About this calculator
Lift Category buckets Maximum Lift into five tiers -- Sedentary (up to 10 lbs), Light (11-20 lbs), Medium (21-50 lbs), Heavy (51-100 lbs), and Very Heavy (over 100 lbs) -- matching the U.S. Department of Labor's (DOL) standard physical-demand-level job-classification thresholds, first published in the Dictionary of Occupational Titles and still used today across occupational medicine and disability evaluation (including Social Security disability determinations). That DOL sourcing applies to Lift Category specifically. Overall Capacity Score and Work Restriction Level are this calculator's own synthesis, not DOL-defined determinations: Overall Capacity Score builds a single 0-100 composite from five tolerance tests -- lifting, carrying, standing, walking, and sitting -- each capped at 100% once it reaches a 240-minute (4-hour) continuous-tolerance reference ceiling (for standing/walking/sitting) or a 100 lb / 100 ft ceiling (for lift/carry), then weighted: lifting counts for 30% of the score, standing and walking tolerance 20% each, sitting tolerance 20%, and carrying distance 10%.
That weighting reflects that lifting capacity is typically the most limiting factor in physical work capacity, while carry distance -- which mostly tracks with walking ability already captured elsewhere -- gets the smallest independent weight. Work Restriction Level then translates the composite score into a rough self-assessment category, from no restrictions at a 65+ score down to unable to work below 25. This is a general self-assessment tool for exploring physical tolerances, not a workers'-compensation or disability determination -- those decisions should come from a qualified medical or vocational evaluator performing a credentialed functional capacity evaluation.
Medical Disclaimer
This calculator is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health. Never disregard professional medical advice or delay seeking it because of results from this tool.
Inputs
Results
Lift Category
3 (1=Sedentary, 2=Light, 3=Medium, 4=Heavy, 5=Very Heavy)
Overall Capacity Score
52 / 100
Figures current as of 1991. Source: U.S. Department of Labor, Employment and Training Administration. Dictionary of Occupational Titles, 4th ed. (Revised 1991) — physical demand strength ratings, as adopted in Social Security Administration disability-evaluation policy (POMS DI 25001.001).
How to Use This Calculator
- Enter Maximum Lift, Carry Distance, and Standing Tolerance.
- Set Walking Tolerance and Sitting Tolerance.
- Review Lift Category ((1=Sedentary, 2=Light, 3=Medium, 4=Heavy, 5=Very Heavy)) and Overall Capacity Score (/ 100).
- Use Work Restriction Level ((1=None, 2=Light Duty, 3=Modified, 4=Unable)) as a general self-assessment guide, not as a workers'-compensation or disability determination -- those require a qualified medical or vocational evaluator.
What each input means
- Maximum Lift
- Maximum weight the patient can safely lift in pounds.
- Carry Distance
- Maximum distance the patient can carry a load in feet.
- Standing Tolerance
- How long the patient can stand continuously in minutes.
- Walking Tolerance
- How long the patient can walk continuously in minutes.
- Sitting Tolerance
- How long the patient can sit continuously in minutes.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersMaximum Lift = 40, Carry Distance = 50, Standing Tolerance = 120, Walking Tolerance = 60 = 5 input(s) provided
- Calculate Lift CategoryLift Category3 = 3
- Calculate Overall Capacity ScoreOverall Capacity Score52 = 52
- Calculate Work Restriction LevelWork Restriction Level2 = 2
Figures and sources
- Physical Demand Level classification (Sedentary/Light/Medium/Heavy/Very Heavy) (1991) — U.S. Department of Labor, Employment and Training Administration. Dictionary of Occupational Titles, 4th ed. (Revised 1991) — physical demand strength ratings, as adopted in Social Security Administration disability-evaluation policy (POMS DI 25001.001).
Engine last updated . Checked against 3 independently-derived tests — how we verify calculators. Built by Paul Gunder, a software engineer, not a licensed financial, medical, or legal professional.
Frequently Asked Questions
Why doesn't Carry Distance affect the Lift Category result?
Lift Category is determined entirely by Maximum Lift against the DOL's standard Sedentary/Light/Medium/Heavy/Very Heavy thresholds -- it doesn't reference Carry Distance or any other tolerance at all. Carry Distance instead feeds into the separate Overall Capacity Score, where it contributes a smaller 10% weight alongside lifting, standing, walking, and sitting.
How are the five tolerance tests weighted into the Overall Capacity Score?
Lifting capacity carries the heaviest weight at 30% of the score, standing and walking tolerance each contribute 20%, sitting tolerance contributes 20%, and carry distance contributes the remaining 10%. Those weights add up to 100%, reflecting that lifting ability is generally the most job-limiting factor in a functional capacity assessment.
What do the DOL physical demand levels (Sedentary, Light, Medium, Heavy, Very Heavy) mean?
They're the U.S. Department of Labor's standard classification of how much lifting a job requires: Sedentary tops out at 10 lbs, Light goes up to 20 lbs, Medium up to 50 lbs, Heavy up to 100 lbs, and Very Heavy exceeds 100 lbs. Employers, vocational evaluators, and disability determinations widely use these same categories to describe job physical requirements.
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