Photometry & ImagingFoot Lamberts to Nits

Foot-Lamberts to Nits

Methodology·How We Verify

Snapshot

1 Foot-Lamberts equals 3.426259 Nits.

Reference basis: This conversion uses fixed luminance constants anchored to candela per square meter.
Example: For 5 Foot-Lamberts, the result equals 17.131295 Nits.

Interactive conversion

Converter Calculator

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

3.426259 Nits (nit)

Switch

API and AI agent access

Foot-Lamberts to Nits.

Machine-readable identifiers

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

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": "nits"
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "photometry-imaging",
    "value": 1,
    "from": "foot_lamberts",
    "to": "nits",
    "result": {
      "raw": 3.4262590996,
      "display": "3.426259"
    },
    "canonicalPath": "/photometry-imaging/foot-lamberts-to-nits/"
  }
}

API, OpenAPI and WebMCP documentation

Explanation

The converter converts foot-lamberts into nits by normalizing both luminance units through candela per square meter. Formula: nit = fL × 3.4262590996. 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 = 3.426259 Nits.
Consistency rule: calculator output and table values use the same constants and rounding policy.

Common Conversion Values

Foot-Lamberts (fL)	Nits (nit)
1	3.426259
5	17.131295
10	34.262591
25	85.656477
50	171.312955
100	342.62591
250	856.564775
500	1,713.12955
1000	3,426.2591

Questions & answers

Frequently Asked Questions

Why is Foot-Lamberts to Nits 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 nits?

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 Nits?

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