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sci.mental-workload-NASA-TLX Calculator
Calculates the NASA Task Load Index from six subjective workload dimensions (mental, physical, temporal demand, performance, effort, frustration) weighted by pairwise comparisons. Weighted TLX scores > 60 indicate excessive workload requiring redesign — NASA-TLX is the most widely used subjective workload assessment tool.
Inputs
Mental Demand
Reference formula or conversion factor shown for context.
Physical Demand
Reference formula or conversion factor shown for context.
Temporal Demand
Reference formula or conversion factor shown for context.
Performance
Reference formula or conversion factor shown for context.
Effort
Reference formula or conversion factor shown for context.
Frustration
Reference formula or conversion factor shown for context.
Results
NASA-TLX overall workload
Sample size or count used in the calculation.
mental demand score
A numerical rating from the scoring model in use.
temporal demand score
A numerical rating from the scoring model in use.
performance score (0=perfect, 100=failure)
A numerical rating from the scoring model in use.
NASA-TLX = average of 6 dimensions
The arithmetic mean -- sum divided by count.
workload classification
Category assigned based on where the computed value falls on a defined scale. Check which standard or guideline defines these boundaries.