BS 5266 planning tool

Emergency Lighting Requirements Calculator for Contractors

Get a quick first allowance for emergency luminaires, exit signs and product ranges before the formal emergency lighting design is completed.

Step 1 Enter the site basics

Project type, area, floors, escape route length and final exit doors.

Step 2 Tick the obvious checks

Stairs, open areas, high-risk rooms, monitored testing and track emergency.

Step 3 Use the take-off view

Carry the allowance into quotation notes, product selection and design review.

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Emergency planning guide

Use the emergency calculator as a first contractor take-off.

This emergency lighting calculator gives a first allowance for escape-route luminaires, open-area provision, stair coverage and exit sign positions. It is designed for early quotation and product selection before the full emergency design is drawn.

The result is not a substitute for compliant emergency lighting design. It is a practical way to turn site basics into a product selection and a clear list of checks to carry forward.

How the calculator works

The calculator uses area, escape route length, floors, exits and emergency conditions such as stairs or high-risk tasks to estimate a first allowance. It then separates the project into route luminaires, open-area provision, exit signage and checks for the designer.

This gives a practical starting point for contractor pricing, product selection and early coordination before detailed spacing and lux checks are carried out.

What still needs formal design

Final emergency layouts must still be checked against the relevant standards, building use, risk assessment, mounting positions, testing strategy and site-specific escape paths. A point estimate alone is not enough for compliance.

Self-test, DALI monitoring, maintained versus non-maintained operation and emergency duration all need review against the project brief.

Emergency Calculator FAQ

Can this replace an emergency lighting design?

No. It is a planning tool only. Final emergency lighting must be designed, installed, tested and commissioned against the applicable standards and building requirements.

Does it calculate final lux on the escape path?

No. It estimates likely point count and category mix. Formal design still needs path-by-path photometric validation.

Why does path length matter so much?

Longer paths usually need more emergency points and more sign coordination, especially where stairs, direction changes or multiple exits are involved.

When should I use self-test or monitored emergency lighting?

That depends on the scale of the building, maintenance strategy and compliance process. Larger or more operationally complex sites often benefit from monitored testing.