Halo Safety

Free HSE calculators

Run in your browser · no sign-up · nothing leaves your device
Every calculator here is free and runs entirely in your browser. No account, no sign-up, and no measurement you enter is sent anywhere. They use the same formulas as the Halo HSE iOS app, and state their limits as plainly as the app does.

Available now

Noise exposure · LEX,8h

Daily noise exposure from any number of periods, evaluated against EU 2003/10/EC (80 / 85 / 87 dB(A)) or OSHA 1910.95 (85 / 90 dB(A)). Equal-energy method, 3 dB exchange rate.

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In the app, and coming to the browser

  • Hand-arm vibration · A(8)

    Daily vibration exposure under EU 2002/44/EC, with the 2.5 and 5.0 m/s² action and limit values.

  • NIOSH lifting equation

    Recommended weight limit and lifting index, all six multipliers, 1994 revision.

  • Risk matrix

    Configurable 3×3, 4×4 and 5×5 matrices, saved per site.

  • Confined space gas

    LEL, O₂, H₂S and CO. Not built yet in either place.

Halo HSE

All of them, offline, in one app

Halo HSE is a one-time €14.99 purchase, not a subscription. It adds a dated change history on every assessment, signed PDF export, and an expense receipt you can hand to your employer.

Download on the App Store