Plan the work
Carry the estimate into the job plan.
The useful result is not just the number. It should support owners, programme assumptions and delivery readiness.
Workflow
Vibration magnitude
Health & Safety
HAVS Calculator.
Estimate hand-arm vibration A(8) exposure from vibration magnitude and trigger time. Free online tool for UK construction and trade teams.
Connected calculator
Live estimate
Use the result as a planning estimate, then turn it into tasks, templates, evidence and delivery records.2Inputs
2Results
3Trade tags
Estimate In Product
Put the calculation beside the workflow it informs.
HAVS Calculator is a quick way to test the number. Zektrx gives that number a route into planning, materials, evidence and reporting once the work starts moving.
1
Plan the work
Vibration magnitude
2
Check materials
A(8) exposure
3
Report the decision
Risk Assessment
Check materials
Turn quantities into stock and purchase context.
Material estimates can connect to stock checks, reservations, purchasing notes and job-linked records.
Workflow
A(8) exposure
Report the decision
Keep assumptions visible after the calculation.
Saved outputs can support reports, handover packs, client review and repeatable estimating habits.
Workflow
Risk Assessment
m/s2
hours
Instant Results
A(8) exposure
1.77m/s2 A(8)
Estimated daily vibration exposure.
Exposure points
63points
Approximate HSE-style exposure points.
Estimate To Evidence
Make the result useful beyond the screen.
A calculator result is most useful when it feeds the job plan, material checks and team briefing that follow the estimate.
Measure the work
Use the estimate as a planning input for scope, labour, equipment and site readiness.
Plan materials
Turn quantities into stock checks, purchasing notes and job-linked material records.
Brief delivery
Give teams the assumptions, limits and checks behind the number before work starts.
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.
Knowledge Journey
Learn, use, then automate.
1. Learn
GuideConstruction Calculators
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2. Use
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Screen work-at-height task risk using height, duration, people and control rating. Free online tool for UK construction and trade teams.
3. Automate
Featuresafety
Construction Health and Safety Software
Connect RAMS, incidents, training, permits, inspections and safety evidence.
Featurerams
RAMS Software
Create, review and manage RAMS, method statements, signatures and evidence.
Featurerisk assessment
Risk Assessment Software
Build controlled risk assessments with owners, review dates and linked evidence.
4. Start
Create a risk assessment in Zektrx.
Turn hazards, controls, owners, reviews and evidence into a controlled risk assessment workflow.
Create Risk AssessmentRelated Content
Connected calculators, templates and workflows.
Related Guides
Keep learning
GuideConstruction Calculators
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A construction calculator for estimating the weekly cost of chasing RAMS, permits, training, audits and evidence.
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A practical list of common RAMS mistakes, from copied templates and stale versions to missing signatures and disconnected evidence.
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Related Calculators
Run the numbers
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Document the work
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Identify hazards, people at risk, existing controls, further actions and review dates. Free, editable construction template from Zektrx.
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Related FAQs
Does this replace noise monitoring?
No. Use competent monitoring and legal guidance for exposure assessment and controls.
From Noise Exposure Calculator
What if there are multiple tools?
Assess each exposure and combine them with a suitable occupational noise method.
From Noise Exposure Calculator
Is this an official manual handling assessment?
No. It helps triage tasks before a competent risk assessment and site-specific controls.
From Manual Handling Calculator
What should a high score trigger?
Review mechanical aids, team lifting, route changes, reduced load weight, handling frequency and training.
From Manual Handling Calculator
FAQ
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
Create a risk assessment in Zektrx.
Turn hazards, controls, owners, reviews and evidence into a controlled risk assessment workflow.