Inputs

Room length m Enter a numeric project value in m at or above 0.1. Room width m Enter a numeric project value in m at or above 0.1. Ambient target illuminance lux Enter a numeric project value in lux at or above 1. Vanity target illuminance lux Enter a numeric project value in lux at or above 1. Mirror or vanity width m Enter a numeric project value in m at or above 0.1. Mirror or vanity height m Enter a numeric project value in m at or above 0.1. Ceiling luminaire output lm Enter a numeric project value in lm at or above 1. Vanity luminaire output lm Enter a numeric project value in lm at or above 1. Utilisation factor ratio Enter a numeric project value in ratio between 0.01 and 1. Maintenance factor ratio Enter a numeric project value in ratio between 0.01 and 1. Wet-area product data verified Tick when this condition applies or the record is available.

Room area -- m2

Mirror or vanity area -- m2

Ambient initial lumens -- lm

Ambient fixture estimate --

Calculation details

Room area: -- m2
Mirror or vanity area: -- m2
Ambient initial lumens: -- lm
Ambient fixture estimate: --
Vanity initial lumens: -- lm
Vanity fixture estimate: --
Suggested total fixtures: --
Wet-area product data verified: --

Important notes

This calculator does not determine wet-area zones, IP requirements, electrical installation suitability, or compliance.
Australian residential guidance and any AS/NZS 1680 application require current, task-specific review; this result is not an automatic compliance claim.

Formulas

\(\displaystyle A_{\mathrm{vanity}} = W_{\mathrm{mirror}} \times H_{\mathrm{mirror}}\)
\(\displaystyle \Phi_z = \frac{E_z \times A_z}{UF \times MF}\)
Wet-area product selection and installation conditions require product and electrical review.

Estimate ambient and vanity lighting quantities while flagging wet-area product verification.

Bathroom Lighting Planner is a planning aid. Keep the target source, product data, measurement method, and project assumptions with the result. Confirm compliance, installation, certification, and safety decisions with the responsible professional.

Inputs

Results

Formulas