Photometry & ImagingFoot Lamberts to Kilocandela per Square Meter

Foot-Lamberts to Kilocandela per Square Meter

Methodology·How We Verify

Snapshot

1 Foot-Lamberts equals 0.003426 Kilocandela per Square Meter.

Reference basis: This conversion uses fixed luminance constants anchored to candela per square meter.
Example: For 5 Foot-Lamberts, the result equals 0.017131 Kilocandela per Square Meter.

Interactive conversion

Converter Calculator

Decimals: 1.5 or 1,5. Fractions: 1/2. Scientific notation: 1e3. Write 1000 without grouping separators.

0.003426 Kilocandela per Square Meter (kcd/m2)

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API and AI agent access

Foot-Lamberts to Kilocandela per Square Meter.

Machine-readable identifiers

Conversion family: photometry-imaging
Source unit: foot_lamberts
Target unit: kilocandela_per_square_meter

Use these identifiers in the API request. Sources and model limits also apply to software clients.

Example API request and response

POST /api/v1/convert

Request

{
  "family": "photometry-imaging",
  "value": 1,
  "from": "foot_lamberts",
  "to": "kilocandela_per_square_meter"
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "photometry-imaging",
    "value": 1,
    "from": "foot_lamberts",
    "to": "kilocandela_per_square_meter",
    "result": {
      "raw": 0.0034262590996,
      "display": "0.003426"
    },
    "canonicalPath": "/photometry-imaging/foot-lamberts-to-kilocandela-per-square-meter/"
  }
}

API, OpenAPI and WebMCP documentation

Explanation

The converter converts foot-lamberts into kilocandela per square meter by normalizing both luminance units through candela per square meter. Formula: kcd/m2 = fL × 0.0034262590996. That keeps the snapshot, calculator, common values, and mirror page aligned on one luminance basis.

This is useful for display brightness checks, projection calibration, and imaging workflows where legacy photometric units and modern cd/m²-based measurements need to match cleanly.

Method & Luminance Basis

Method basis: both units reduce through candela per square meter, then apply the fixed target-unit luminance relationship.
Applied factor: 1 Foot-Lamberts = 0.003426 Kilocandela per Square Meter.
Consistency rule: calculator output and table values use the same constants and rounding policy.

Common Conversion Values

Foot-Lamberts (fL)	Kilocandela per Square Meter (kcd/m2)
1	0.003426
5	0.017131
10	0.034263
25	0.085656
50	0.171313
100	0.342626
250	0.856565
500	1.71313
1000	3.426259

Questions & answers

Frequently Asked Questions

Why is Foot-Lamberts to Kilocandela per Square Meter useful in display and projection work?

This route is useful when comparing modern display-brightness values with legacy luminance units used in cinema, projection, calibration, and older imaging references.

When would I convert foot-lamberts to kilocandela per square meter?

This route is useful when comparing modern display-brightness values with legacy luminance units used in projection, cinema, and older photometric references.

How do I reverse Foot-Lamberts to Kilocandela per Square Meter?

Use the mirror Kilocandela per Square Meter to Foot-Lamberts route; it applies the inverse relationship with the same cd/m²-based luminance assumptions.