---
title: "Nominal Hazard Zone (NHZ) Calculations"
id: "9844"
type: "page"
slug: "nhz-calculations"
published_at: "2024-08-27T19:47:48+00:00"
modified_at: "2025-01-24T21:55:16+00:00"
url: "https://www.lasersafetycertification.com/nhz-calculations/"
markdown_url: "https://www.lasersafetycertification.com/nhz-calculations.md"
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---

# Nominal Hazard Zone Calculations

## How to do Nominal Hazard Zone Calculations

## Calculation Resources:

MPE Background, Physics, & Calculation Plots

[https://lasermpe.com/overview.html](https://lasermpe.com/overview.html)

Nominal Ocular Hazard Distance Calculator:

[https://www.laserpointersafety.com/calculator.html](https://www.laserpointersafety.com/calculator.html)

Nominal Ocular Hazard Distance Calculator (including aperture diam):

[https://www.laserworld.com/en/laserworld-toolbox/nohd-calculator.html#nohd](https://www.laserworld.com/en/laserworld-toolbox/nohd-calculator.html#nohd)

Beam Parameter Product Calculator (BPP for divergence angle):

[https://www.rp-photonics.com/beam_parameter_product.html](https://www.rp-photonics.com/beam_parameter_product.html)

M^2 Factor Calculator:

[https://www.rp-photonics.com/m2_factor.html](https://www.rp-photonics.com/m2_factor.html)

Biomedical Laser Equipment Service and Sales:

[http://cer-technology.com/](http://cer-technology.com/)