Near Miss Frequency Rate Online Calculator | NMFR Formula & Fast Results

Complete explanation + formula + examples for Safety Professionals, HSE Engineers, and NEBOSH learners.



NMFR Calculator
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📌 What Is Near Miss Frequency Rate (NMFR)?

The Near Miss Frequency Rate (NMFR) is a key leading indicator in workplace safety. Unlike lagging indicators (injuries, incidents), NMFR helps identify unsafe conditions before they cause accidents.

A higher NMFR often means your workforce is reporting hazards and unsafe acts regularly — which is a positive sign of strong safety culture.

NMFR helps safety teams:
✔ Detect hazards early
✔ Strengthen proactive safety actions
✔ Improve reporting culture
✔ Support ISO 45001, OSHA & client audits
✔ Benchmark safety performance across sites

📘 NMFR Formula

NMFR = (Number of Near Misses × 1,000,000) ÷ Total Manhours Worked

Where:

  • Number of Near Misses = Total near-miss events reported
  • 1,000,000 = Standardized manhour base
  • Total Manhours Worked = Combined labor hours of the workforce

📍 Why NMFR Is Important

Near misses expose hidden risks that haven’t yet caused harm. Tracking NMFR helps safety professionals:

  • Prevent future accidents
  • Identify repeated unsafe acts
  • Strengthen hazard reporting culture
  • Improve proactive safety planning

Companies in Oil & Gas, Construction, Manufacturing, EPC, Power Plants and ISO 45001-certified workplaces use NMFR to measure proactive safety performance.

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