HAVS Calculator.
Estimate hand-arm vibration A(8) exposure from vibration magnitude and trigger time.
Connected to Zektrx
Use this result as a planning estimate, then create controlled Zektrx records for tasks, templates, evidence, actions, pricing and delivery.
Instant Results
A(8) exposure
1.77m/s2 A(8)
Estimated daily vibration exposure.
Exposure points
63points
Approximate HSE-style exposure points.
Explanation
What this calculates
The exposure is normalised to an 8-hour reference period.
Formula
A(8) = vibration magnitude x square root(trigger time / 8)
Inputs are validated on screen and converted where unit options are available.
Worked Example
Example result
5 m/s2 for 1 hour gives A(8) of about 1.77 m/s2 and 50 exposure points.
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Learn before you act.
RAMS Guide: What to Check Before Work Starts
A practical pre-start RAMS guide for checking scope, hazards, controls, signatures and site evidence before a job begins.
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Calculator questions.
What is trigger time?
Trigger time is the time the tool is actually vibrating in the worker's hands, not the whole task duration.
Should I use declared tool values?
Manufacturer data can be a start, but measured site data is better for risk assessment.
Next Step
Make estimates part of the job record.
Zektrx connects calculators, templates, articles, evidence, actions, pricing and free trial routes so one-off estimates can become repeatable contractor workflows.