Confined Space Assessment Calculator
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| Compatibility | Windows & Mac |
| Version | 1.0 |
| File Size | 1.2 MB |
| Last Updated | June 2026 |
| Delivery | Instant digital download via email |
| Licence | Single user, lifetime access |
Description
The Confined Space Assessment Calculator is an Excel-based weighted scoring tool that helps construction and civil engineering teams categorise confined spaces according to risk level. It evaluates specified risks β including fire and explosion, asphyxiation, drowning, entrapment and toxic atmosphere β alongside depth band and access difficulty factors to assign each space an NC1 to NC4 risk category using a transparent, auditable scoring methodology.
Once a category is assigned, the tool auto-populates the specific requirements for that risk level, covering training qualifications (including City & Guilds 6160 units), rescue team provisions, gas monitoring equipment, breathing apparatus requirements, entry controller competence levels and whether a formal permit to enter is required. This removes the guesswork from confined space planning and ensures the right controls are specified every time.
The calculator is aligned with the Confined Spaces Regulations 1997 and industry guidance on safe systems of work for entry into confined spaces. It is designed for use by site managers, H&S advisors and permit coordinators managing excavations, chambers, tanks, culverts and other confined or enclosed spaces on construction projects.
Key Features
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