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Unit Conversions · Light & radiation · Photometry and optics

Lighting Measurement and Uniformity Calculator

Summarize an entered grid of illuminance measurements with minimum, maximum, mean, range, min-to-average, min-to-max, and optional target counts.

Unit Conversions · Light & radiation · Photometry and optics

Lighting Measurement and Uniformity Calculator

Private in-browser calculation · explicit geometry, units, and physical boundaries

Enter comma-, space-, or line-separated nonnegative readings. Up to 500 measurements.

Used only to count readings at or above and below the entered target; it is not supplied as a standard.

Calculation result

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Enter valid values to see the result.

Your entries are calculated in this browser and are not submitted to 365CALCS.COM.

Quick guide

How to use this calculator

  1. Choose the photometric, radiometric, or photon relationship first, then enter measurements using the stated geometry and unit basis.
  2. Keep luminous and radiant quantities separate. The calculator performs only the declared conversion, reverse solve, geometry, or measurement summary and exposes useful intermediate values.
  3. Use companion outputs to reconcile the scenario, then retain the stated instrument, distribution, spectrum, geometry, and environmental boundaries before applying the result.

Calculation method

How the lighting measurement and uniformity calculator works

Turn field readings into a transparent uniformity summary while preserving every entered measurement for reconciliation.

Mean equals the sum of readings divided by count. Uniformity is reported as minimum/mean and minimum/maximum; range equals maximum minus minimum. An optional visitor target classifies readings without judging compliance.

Worked example

Lighting Measurement and Uniformity example

Readings 200, 250, 300, and 350 lux have mean 275 lux, minimum-to-mean uniformity 0.7273, and minimum-to-maximum uniformity 0.5714.

Mean equals the sum of readings divided by count. Uniformity is reported as minimum/mean and minimum/maximum; range equals maximum minus minimum. An optional visitor target classifies readings without judging compliance.

Supported inputs

Precision and limits

Light and optics boundary

Results depend on the measurement grid, meter, calibration, orientation, stabilization, environmental conditions, and chosen target. This calculator does not select a standard, sampling plan, acceptance limit, or pass/fail conclusion.

Units and precision

Calculations normalize compatible units once, retain working precision, and round only for display. Very small and large nonzero values use scientific notation; displayed precision cannot exceed the entered measurements or source data.

Decision boundary

This calculator does not select a lighting standard, certify compliance, predict perception, or replace calibrated measurement, photometric distribution data, optical design, or safety assessment.

Privacy

Entered values and results stay in this browser and are not sent to analytics or third parties.

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