Daily estimate across multiple tools
Combine several grinders, drills, breakers, or site tools into one daily estimate instead of checking each one in isolation.
Free Fabora tool
Free HAVS calculator for hand-arm vibration exposure.
Use this free HAVS calculator to estimate daily hand-arm vibration — A(8), HSE-style exposure points, and EAV or ELV status — for grinders, drills, needle scalers, breakers and other fabrication or site tools. Add one tool, enter how long you use it, and calculate.
InputsTool, vibration magnitude, trigger time, and optional note
OutputsDaily A(8), exposure points, row contribution, and EAV or ELV status
Use noteSupports HAVS risk assessment with client-side only calculation
Free Fabora tool
Built for fabrication, welding, and site steelwork teams
Useful for workshops, site welders, steel erectors, and supervisors who need a practical vibration exposure estimate without logging into a larger system.
- Editable starter library for common steelwork tools
- Print, share, or copy a simple report
- Nothing entered leaves the browser
Use note
Estimate only, not compliance sign-off
Use measured or manufacturer vibration data where available. Final assessment, controls, and legal duties remain with the employer or duty holder.
UK reference point: Control of Vibration at Work Regulations 2005. EAV is 2.5 m/s^2 A(8) or 100 points. ELV is 5 m/s^2 A(8) or 400 points.
Use the tool
Build the daily estimate
Pick a tool, enter how long you actually use it (the trigger time), and calculate. Add more tools only if several count towards the same day. You get daily A(8), HSE-style exposure points, EAV or ELV status, time to each limit, and a printable summary.
Inputs
Estimate daily hand-arm vibration exposure
Add up to 8 tools or processes, use measured or manufacturer data where available, and calculate a simple daily estimate for A(8), exposure points, and EAV or ELV status.
Results
The estimate will appear once a row is calculated
Choose a tool category, select the tool or process, check the vibration magnitude, enter the trigger time, and calculate. The tool will then show daily A(8), HSE-style exposure points, status, row-by-row contribution, and a printable summary.
Reference table
Vibration magnitudes for common steelwork tools
Typical indicative vibration magnitudes for tools used in fabrication, welding and site steelwork, with how long you could use one tool at that level before reaching the exposure action value (EAV, 2.5 m/s² A(8)) or the exposure limit value (ELV, 5 m/s² A(8)). These are starting points only — measure or use manufacturer data where you can.
| Tool or process | Typical vibration (m/s²) | Time to reach EAV | Time to reach ELV |
|---|---|---|---|
| Grinders and cutting | |||
| Angle grinder 100 to 125 mm | 5 | 2 h | 8 h |
| Angle grinder 180 to 230 mm | 6.5 | 1 h 11 min | 4 h 44 min |
| Angle grinder 300 mm | 8 | 47 min | 3 h 8 min |
| Die grinder | 7 | 1 h 1 min | 4 h 5 min |
| Straight grinder | 6.5 | 1 h 11 min | 4 h 44 min |
| Cut-off saw or abrasive saw | 5.5 | 1 h 39 min | 6 h 37 min |
| Nibbler | 9.5 | 33 min | 2 h 13 min |
| Powered metal shears | 5 | 2 h | 8 h |
| Drilling and fixing | |||
| Standard drill | 3.5 | 4 h 5 min | 16 h 20 min |
| Impact drill | 10 | 30 min | 2 h |
| SDS rotary hammer | 12 | 21 min | 1 h 23 min |
| Core drill | 7 | 1 h 1 min | 4 h 5 min |
| Magnetic drill | 2 | 12 h 30 min | 50 h |
| Impact driver | 6 | 1 h 23 min | 5 h 33 min |
| Impact wrench | 7.5 | 53 min | 3 h 33 min |
| Surface prep and finishing | |||
| Needle scaler, non vibration reduced | 19 | 8 min | 33 min |
| Needle scaler, vibration reduced | 5.5 | 1 h 39 min | 6 h 37 min |
| Chipping hammer or air chisel | 13 | 18 min | 1 h 11 min |
| Random orbital sander | 10 | 30 min | 2 h |
| Orbital sander | 8 | 47 min | 3 h 8 min |
| Belt sander or file sander | 6.5 | 1 h 11 min | 4 h 44 min |
| Wire brush on grinder | 6 | 1 h 23 min | 5 h 33 min |
| Descaling tool | 10 | 30 min | 2 h |
| Site steelwork and concrete fixing | |||
| Breaker, vibration reduced | 12.5 | 19 min | 1 h 17 min |
| Breaker, non vibration reduced | 17.5 | 10 min | 39 min |
| Demolition hammer | 15.5 | 12 min | 50 min |
| Hammer drill for anchors | 12 | 21 min | 1 h 23 min |
| Scabbler | 14.5 | 14 min | 57 min |
| Plate compactor | 15.5 | 12 min | 50 min |
| Air tools | |||
| Air drill | 5 | 2 h | 8 h |
| Air grinder | 8.5 | 42 min | 2 h 46 min |
| Air saw | 8.5 | 42 min | 2 h 46 min |
| Rivet gun | 5.5 | 1 h 39 min | 6 h 37 min |
Times are trigger time — vibration actually entering the hand — not whole-shift time. Reaching the EAV means you must act to reduce exposure; the ELV must not be exceeded. Use the calculator above to combine several tools across one day.
What it helps with
A practical vibration exposure calculator for steelwork teams
This hand arm vibration calculator is aimed at the real questions around the job: what the day may add up to, which tool is doing most of the damage, and whether the estimate is below EAV, at or above EAV, or at or above ELV.
Good fit for
Workshops
Grinding, dressing, drilling, scaling, and other fabrication tasks.
Site work
Anchor drilling, breaking, impact fixing, and remedial steelwork use.
HSE-style points and A(8) together
The tool shows both daily A(8) and exposure points, using 100 points for EAV and 400 points for ELV.
Starter tool library built for steelwork teams
Use editable starter indicative values for common fabrication, welding, and site tools, then override them with measured or manufacturer data when you have it.
Simple report output
Print the browser view, share the result, or copy a summary without sending job details to a backend or saving a record anywhere.
Explanation
How the estimate should be read
The Fabora version keeps the calculator practical. It uses HSE-style exposure points and the standard A(8) approach, but it does not claim automatic legal compliance, safe exposure approval, or a final competent assessment.
What A(8) means
A(8) is the normalised daily vibration exposure over an 8-hour reference period. It helps you compare different tools and trigger times on one day.
What exposure points mean
Exposure points give a second way to read the same estimate. On this page, 100 points equals the exposure action value and 400 points equals the exposure limit value.
What trigger time should cover
Trigger time should reflect the period when the tool is actually transmitting vibration into the hand or arm, not the whole shift if the tool is not running the full time.
Where the data should come from
Measured site values or manufacturer vibration data are better than starter values. Tool condition, discs, bits, material, and working method can all change real exposure.
Assumptions and limitations
Useful for planning and review, not a compliance certificate
This HAVS calculator is a support tool for RAMS review, supervision, and exposure discussions. Use measured or manufacturer vibration data where available, and keep the final assessment with the competent people responsible for the work.
Estimate only
This page supports HAVS risk assessment and planning. It is not a compliance certificate or proof that the work is legally safe.
No data storage
Nothing entered into this calculator is stored in a database, posted to a backend route, or used for analytics on entered values.
Final responsibility stays with the duty holder
Final assessment, controls, information and training, health surveillance, and legal duties remain with the employer or duty holder.
UK reference point
Control of Vibration at Work Regulations 2005 is the main legislative wording referenced here, with EAV at 2.5 m/s^2 A(8) or 100 points and ELV at 5 m/s^2 A(8) or 400 points.
Tool FAQ
Short answers on HAVS, A(8), exposure points, and data use
These are the main questions people usually check before using a vibration exposure calculator on a live job.
Related tools
Need another practical Fabora tool? Try the Welding Electricity Cost Calculator, the Steel Weight Calculator, the Stock Cutting Optimiser, or go back to the full Fabora Tools page.
What is hand-arm vibration exposure?
Hand-arm vibration exposure is the vibration passed from powered hand tools or workpieces into the hands and arms during work. Common steelwork examples include grinders, drills, needle scalers, breakers, and impact tools.
What is A(8)?
A(8) is the daily vibration exposure normalised to an 8-hour reference period. It lets different tool uses and trigger times be compared in one daily figure.
What are HAVS exposure points?
HAVS exposure points are another way to express the same daily estimate. On this calculator, 100 points aligns with the exposure action value and 400 points aligns with the exposure limit value.
What is the exposure action value?
The exposure action value is 2.5 m/s^2 A(8), which is also 100 points in the HSE-style points approach used here. Reaching or going above that level means action is required to reduce exposure.
What is the exposure limit value?
The exposure limit value is 5 m/s^2 A(8), which is also 400 points. Going above that level means the exposure should be reduced and the work reviewed urgently.
What is the daily limit for hand-arm vibration?
Under the Control of Vibration at Work Regulations 2005, the exposure action value (EAV) is 2.5 m/s^2 A(8) (100 HSE points) and the exposure limit value (ELV) is 5 m/s^2 A(8) (400 points). At or above the EAV you must act to reduce exposure; the ELV must not be exceeded.
What are the early signs of HAVS?
Early signs of hand-arm vibration syndrome include tingling and numbness in the fingers, loss of feeling and dexterity, and fingertips going white in the cold (blanching), often called vibration white finger. Report symptoms early, because the damage can become permanent.
What is vibration white finger?
Vibration white finger is a form of HAVS where the small blood vessels in the fingers are damaged, so the fingertips go white and numb, especially in the cold. It can reduce grip and dexterity and may become permanent.
How long can you use an angle grinder before reaching the limit?
It depends on the tool's vibration magnitude. A 100 to 125 mm angle grinder at about 5 m/s^2 reaches the exposure action value in roughly 2 hours of trigger time and the exposure limit value in about 8 hours. Higher-vibration tools reach the limits much faster — check the reference table on this page or use the calculator for your tool.
Can HAVS be reversed?
In its early stages, symptoms may improve if vibration exposure is reduced or stopped. More advanced HAVS and vibration white finger are generally permanent, which is why early action and health surveillance matter.
How do you reduce hand-arm vibration exposure?
Reduce trigger time, use lower-vibration and well-maintained tools, pick the right tool and consumable for the job, rotate tasks between workers, keep hands warm, and put anyone at or above the EAV into health surveillance. Anti-vibration gloves are not a reliable control on their own.
Should I use the tool library value or manufacturer data?
Use measured or manufacturer vibration data where available. The Fabora library values are starter indicative values only and are there to help you get a first estimate moving.
Does Fabora store my calculator data?
No. This hand arm vibration calculator runs in the browser only. Fabora does not save the values to a backend, account, database, or entered-value analytics event from this page.
Is this a legal compliance certificate?
No. This is an estimate to support HAVS risk assessment and RAMS review. It does not replace competent assessment, measured data, management controls, health surveillance decisions, or legal duties.
Fabora RAMS
Need to include HAVS controls in your RAMS?
Fabora RAMS helps create editable RAMS for welding, fabrication, and site installation work using reusable company content and job-specific review. It is built to support practical documentation work, not to claim automatic compliance.