Photometry & ImagingStilbs to Foot Lamberts

Stilbs to Foot-Lamberts

Methodology·How We Verify

Snapshot

1 Stilbs equals 2,918.63508 Foot-Lamberts.

Reference basis: This conversion uses fixed luminance constants anchored to candela per square meter.
Example: For 5 Stilbs, the result equals 14,593.175398 Foot-Lamberts.

Interactive conversion

Converter Calculator

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

2,918.63508 Foot-Lamberts (fL)

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API and AI agent access

Stilbs to Foot-Lamberts.

Machine-readable identifiers

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

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": "stilbs",
  "to": "foot_lamberts"
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "photometry-imaging",
    "value": 1,
    "from": "stilbs",
    "to": "foot_lamberts",
    "result": {
      "raw": 2918.63507963,
      "display": "2,918.63508"
    },
    "canonicalPath": "/photometry-imaging/stilbs-to-foot-lamberts/"
  }
}

API, OpenAPI and WebMCP documentation

Explanation

The converter converts stilbs into foot-lamberts by normalizing both luminance units through candela per square meter. Formula: fL = sb × 2918.63507963. 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 Stilbs = 2,918.63508 Foot-Lamberts.
Consistency rule: calculator output and table values use the same constants and rounding policy.

Common Conversion Values

Stilbs (sb)	Foot-Lamberts (fL)
1	2,918.63508
5	14,593.175398
10	29,186.350796
25	72,965.876991
50	145,931.753982
100	291,863.507963
250	729,658.769908
500	1,459,317.539815
1000	2,918,635.07963

Questions & answers

Frequently Asked Questions

Why is Stilbs to Foot-Lamberts 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 stilbs to foot-lamberts?

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 Stilbs to Foot-Lamberts?

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