Inputs
Results
Columns
--
Rows
--
Planned points
--
Excluded points
--
Measurement plane
--
Grid status
--
Record note
--
Calculation details
- Columns
- --
- Rows
- --
- Planned points
- --
- Excluded points
- --
- Usable points
- --
- Adjusted x spacing
- -- m
- Adjusted y spacing
- -- m
- Measurement plane
- --
- Grid status
- --
- Record note
- --
Important notes
- This is a planning grid only; confirm the measurement method, room datum, and excluded point rationale before using field readings.
- The calculator does not certify compliance with AS/NZS 1680, AS/NZS 2293, or any project specification.
Formulas
- \(\displaystyle C = \left\lfloor\frac{L - 2O}{S_x}\right\rfloor + 1,\quad R = \left\lfloor\frac{W - 2O}{S_y}\right\rfloor + 1\)
- \(\displaystyle S_{x,\mathrm{actual}} = \frac{L - 2O}{C - 1},\quad S_{y,\mathrm{actual}} = \frac{W - 2O}{R - 1}\)
Estimate columns, rows, usable points, and adjusted spacing for a custom rectangular lux measurement grid.
Custom Lux Measurement Grid 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.
FAQs
Why is the adjusted spacing different from the target spacing?
The calculator fits whole grid intervals inside the usable measurement area, then reports the actual equal spacing between retained grid lines.