NIOSH Lifting Index LI Calculator
NIOSH load/RWL index from independently applicable complete RNLE evidence, not injury probability. Caller independently establishes matching units, evidence, method edition and applicability; output is not compliance, diagnosis, work-safety approval, geological identity or validated hazard prediction.
Description
A lifting index divides actual load by a recommended weight limit on the same mass basis.
A lifting index divides actual load by a recommended weight limit on the same mass basis.1
The ratio requires an independently appropriate weight limit and does not diagnose an individual's condition. Use this tool to calculate NIOSH Lifting Index LI from the supplied measurements and assumptions.
When to use NIOSH Lifting Index LI Calculator
Use this tool to calculate NIOSH Lifting Index LI from the supplied measurements and assumptions. Establish the observation protocol, units, task and reference population or review criterion before entering measurements.
How to use NIOSH Lifting Index LI Calculator and understand its results
- Establish the observation protocol, units, task and reference population or review criterion before entering measurements.
- Enter actualLoadKg, independentRecommendedWeightLimitKg, using the field meanings and rules below, then run the tool.
- Read liftingIndex. Interpret the fields using their units, signs and evidence conventions below.
- If input validation fails, correct the reported field and run again. Before applying the result, check reference scope, model assumptions and any missing evidence or placeholder values.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| actualLoadKg | Actual load kg | number | Required |
| independentRecommendedWeightLimitKg | Independent recommended weight limit kg | number | Required |
Enter nonnegative actual load and a positive independently calculated recommended weight limit in matching mass units. Divide actual load by RWL. A zero RWL fails instead of returning infinity; no risk-category verdict is emitted.
liftingIndex=actualLoad/RWL Use the exact units, boundary rules, ordering and missing-evidence conventions above.
| Output field | Meaning | Value type |
|---|---|---|
| liftingIndex | Lifting Index; follow the units, sign, ordering and evidence convention stated above | number |
{
"input": {
"actualLoadKg": 10,
"independentRecommendedWeightLimitKg": 5
},
"output": {
"liftingIndex": 2
}
}Limitations and assumptions
The ratio requires an independently appropriate weight limit and does not diagnose an individual's condition. Interpretation depends on the units, sampling scope and exact model described above.
All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse evidence arrays fail validation; the specific bounds and alignment requirements are stated above. Extremely large inputs or outputs can also be rejected. An input error is distinct from a successful result reporting false, no matches or missing evidence.
Alternative or Complementary methods
Use NIOSH RWL Load Constant Base Calculator for this related task: The Revised NIOSH Lifting Equation multiplies a load constant by six task multipliers.
Use NIOSH Composite Lifting Index CLI Calculator when its separate inputs and assumptions fit the question: A composite lifting index combines demands across an ordered set of lifting tasks.
References
-
NIOSH Lifting Index LI Calculator — tool.io
Similar or alternative tools
- NIOSH RWL Load Constant Base Calculator
The Revised NIOSH Lifting Equation multiplies a load constant by six task multipliers.
- NIOSH Composite Lifting Index CLI Calculator
A composite lifting index combines demands across an ordered set of lifting tasks.