HAND–ARM VIBRATION
Your tools. Your time.
Your daily exposure.
Choose your manufacturer, tool model and working mode, then enter your trigger time to calculate your daily HAVS points.
HAV calculatorUK HSE points method
01 Tools used today
Use trigger time: the time your hands are exposed while the tool is vibrating.
4,245 model records · 13 manufacturers · Current and legacy sources; coverage is incomplete.
Check your tool’s vibration value.
Vibration used = manufacturer declaration + uncertainty allowance. Published K above 1.5 m/s² is retained; otherwise the allowance is 1.5 m/s², including when K is missing. Check the selected mode and your workplace assessment. Missing declarations require an assessed value.
SUPERVISOR’S DAILY SHEET
Daily HAVS report
Add each operative’s complete daily calculation. Review their tool breakdown, then print the sheet for signatures.
Drafts are saved in this browser only, not shared between devices. Print or save a PDF for your records. Sign the final printed sheet after checking it.
HANDARM · DAILY EXPOSURE RECORD
Daily HAVS report
No operatives added for this date yet.
| Operative | Trigger time | Daily HAVS points | A(8) m/s² | Exposure status | Operative’s signature | Review |
|---|
Operative confirmation: I confirm that the tools and trigger times recorded for me are correct to the best of my knowledge.
Supervisor:
Signature: Date:
I have reviewed the entries and any action required to control vibration exposure.
100 points: exposure action value · 400 points: daily exposure limit. Below the action value does not mean no risk. Points use the entered vibration values and actual trigger times; review against your workplace assessment. Displayed points are truncated to one decimal; status uses the full calculation.
Operatives’ tool breakdowns
KNOW THE THRESHOLDS
What do the points mean?
Below the action value. Keep exposure as low as reasonably practicable.
Action value reached. Your employer must take steps to control exposure.
Daily limit reached or exceeded. Stop further exposure and tell your supervisor.
Catalogue coverage
Current and discontinued models are included where published data is available. This is not a complete inventory of every UK tool. Hilti’s current UK power-tool pages and Makita’s UK-hosted historical vibration table provide the bulk of the catalogue; STIHL and Bosch UK product-page records also cover a selection of equipment. Bosch’s 2019 Noise & HAV workbook supplies additional historical records; single-axis figures require an assessed triaxial value. DeWalt’s current linked product pages supply model names, but most omit vibration specifications; only selected manual-backed values are included. HiKOKI UK product pages provide additional article-specific values, with separate applications where published. Milwaukee and Metabo UK pages add article-specific working modes. Husqvarna records retain the highest published handle and configuration figure. Wacker Neuson uses only explicitly labelled hand–arm vibration magnitudes; whole-body and vibration-frequency figures are excluded. Unavailable manufacturer uncertainty is shown as missing; the calculator uses the assumed 1.5 m/s² allowance. Other manufacturers currently have selected entries. A model’s UK sales history and discontinued status are not always documented.
“Declared data” means a numeric manufacturer declaration is included; it is not a workplace measurement. Models without a numeric declaration are temporarily unlisted and will be added as their data is verified. Some listed working modes still require an assessed value. Compound values and ambiguous source rows require manual assessment. Tool attachments, handles, test modes and model generations can change the result.
| Manufacturer | Published models |
|---|
Source review: 12 September 2026. Search the exact model and use “Model not listed” if it is absent. Hilti UK catalogue ↗
Calculation method & guidance
For each tool: points = 2 × vibration magnitude² × trigger time in hours. Add the tool points for the daily total. A(8) = √(total points ÷ 16).
The exposure action value is 100 points (2.5 m/s² A(8)); the daily exposure limit is 400 points (5 m/s² A(8)). Catalogue starting values equal the manufacturer declaration plus the published K when K is above 1.5 m/s². Otherwise a 1.5 m/s² allowance is used, including when K is missing. This minimum allowance is a site default; manufacturer K remains visible for reference. No HSE tool-type minimum is applied. Generic HSE estimates remain separate. Missing declarations require an assessed in-use value. K is test uncertainty, not a workplace correction factor. Older model generations remain listed with their source revision; this is not a live or exhaustive catalogue. When two handles differ, the higher declared value is used. Displayed points are truncated to one decimal; thresholds use the full calculation. This calculator supports an employer’s risk assessment; it does not diagnose HAVS or establish that exposure is safe.
HSE tool values and risk assessment ↗HSE calculator guidance ↗