ergonomics

NIOSH Lifting Calculator

Free NIOSH Lifting Equation calculator (1994 revision). Calculates RWL and Lifting Index for manual lifting tasks. ACGIH and HSE UK accepted.

Horizontal distance H (cm)

Vertical origin V (cm)

Vertical travel D (cm)

Asymmetry angle A (°)

Frequency (lifts/min)

Duration (hours)

Grip / coupling

Actual load (kg)

Result

{
  "rwl": 11.3,
  "li": 1.32,
  "risk": "increased"
}

Formula

RWL = LC × HM × VM × DM × AM × FM × CM; LI = Load / RWL

Regulation

NIOSH Publication 94-110

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Free for any website, blog, or course — MIT / CC BY 4.0. Attribution stays visible.

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