Adjusting OEL - QHSE Link

Adjusted Exposure Limit Calculator for Unusual Shifts

Adjust an 8-hour Occupational Exposure Limit (OEL) for extended work shifts using the Brief and Scala Model.

Formula: Adjusted OEL = OEL × (8 ÷ h) × ((24 − h) ÷ 16)

Original 8-hour OEL Enter the applicable 8-hour exposure limit.

OEL unit This label does not affect the calculation.

Hours worked per shift

hours

Enter the total hours worked during one shift.

Adjusted exposure limit —

Enter the original OEL and shift duration, then select Calculate.

Important: The Brief and Scala Model is a screening method and may not be suitable for every substance, regulation, jurisdiction, or work pattern. Confirm whether adjustment is required and which method is accepted by the applicable authority or occupational hygiene professional.