Calculator Inputs
Enter tool vibration and your work pattern. Use realistic values from the tool label or manual.
Example Data Table
These sample entries show how different tools change exposure.
| Tool | Vibration (m/s²) | Sessions | Minutes/Session | Glove % | Maint. | Grip | Estimated A(8) |
|---|---|---|---|---|---|---|---|
| Hedge Trimmer | 4.5 | 2 | 45 | 10 | 1.00 | 1.05 | ≈ 1.88 |
| Leaf Blower | 6.0 | 3 | 35 | 5 | 1.10 | 1.10 | ≈ 3.77 |
| Chainsaw | 7.5 | 2 | 30 | 0 | 1.15 | 1.20 | ≈ 4.91 |
Values are illustrative; use your tool’s declared vibration where possible.
Formula Used
The calculator estimates the effective vibration (aeff) and daily exposure (A(8)) over an 8‑hour reference day.
- Effective vibration: aeff = ahv × (1 − glove%/100) × maintenance × grip
- Daily exposure: A(8) = √( Σ(aeff² × Ti) / 480 ) with T in minutes
- Single pattern shortcut: A(8) = aeff × √(T / 480)
How to Use This Calculator
- Find the tool vibration magnitude (m/s²) on the label or manual.
- Enter how many sessions you run the tool each day.
- Enter minutes per session based on tool-on time.
- Optional: set glove reduction and technique factors realistically.
- Click calculate to see A(8), risk level, and suggested limits.
- Download CSV or PDF to keep records for your tasks.