Whole Body Vibration Dose Calculator

Work out whole body vibration dose instantly with clear inputs, formula shown and shareable results.

About Whole Body Vibration Dose Calculator

Whole body vibration from vehicles and mobile plant is assessed on the same A(8) basis as hand-arm vibration but against much lower thresholds, typically an action value of 0.5 m/s² and a limit of 1.15 m/s². Seat suspension, tyre pressure and, above all, ground surface condition are the dominant controls.

Formula

Daily exposure

A(8) = magnitude x sqrt(daily hours / 8)

Worked example

With the default values below, Whole Body Vibration Dose Calculator returns Daily exposure A(8) of 0.693. Change any input above and every figure here is recalculated in your browser.

Inputs used

Whole body vibration magnitudeminimum 0.01 m/s²: 0.8 m/s²
Daily exposure timeaccepts 0.01–24 h: 6 h
Exposure action valueminimum 0.01 m/s²: 0.5 m/s²
Exposure limit valueminimum 0.01 m/s²: 1.15 m/s²

Results

Daily exposure A(8): 0.693 m/s²
Share of the action value: 138.6% %
Share of the limit value: 60.2% %
Assessment: Above the action value — controls and health surveillance required

Step by step

1Values used
2Daily exposure
3Daily exposure A(8)= 0.693 m/s²
4Share of the action value= 138.6 %
5Share of the limit value= 60.2 %
6Assessment= Above the action value — controls and health surveillance required

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
Preliminary estimate only. Whole body vibration assessment must follow the vibration regulations in force and be carried out by a competent person.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Preliminary estimate only. Whole body vibration assessment must follow the vibration regulations in force and be carried out by a competent person.

Frequently Asked Questions

How is the Whole Body Vibration Dose figure worked out?

A(8) = magnitude x sqrt(daily hours / 8). Whole body vibration from vehicles and mobile plant is assessed on the same A(8) basis as hand-arm vibration but against much lower thresholds, typically an action value of 0.5 m/s² and a limit of 1.15 m/s².

Why does site surface matter so much?

Most whole body vibration comes from shocks as wheels cross potholes and kerbs. Grading haul roads often cuts exposure more than any change of vehicle.

What values do I need to enter?

This calculator takes 4 inputs: Whole body vibration magnitude, Daily exposure time, Exposure action value, Exposure limit value. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.