Photometry & ImagingApostilbs to Kilocandela per Square Meter

Apostilbs to Kilocandela per Square Meter

Methodology·How We Verify

Snapshot

1 Apostilbs equals 0.000318 Kilocandela per Square Meter.

Reference basis: This conversion uses fixed luminance constants anchored to candela per square meter.
Example: For 5 Apostilbs, the result equals 0.001592 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.

0.000318 Kilocandela per Square Meter (kcd/m2)

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API and AI agent access

Apostilbs to Kilocandela per Square Meter.

Machine-readable identifiers

Conversion family: photometry-imaging
Source unit: apostilbs
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": "apostilbs",
  "to": "kilocandela_per_square_meter"
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "photometry-imaging",
    "value": 1,
    "from": "apostilbs",
    "to": "kilocandela_per_square_meter",
    "result": {
      "raw": 0.000318309886184,
      "display": "0.000318"
    },
    "canonicalPath": "/photometry-imaging/apostilbs-to-kilocandela-per-square-meter/"
  }
}

API, OpenAPI and WebMCP documentation

Explanation

The converter converts apostilbs into kilocandela per square meter by normalizing both luminance units through candela per square meter. Formula: kcd/m2 = asb × 0.000318309886184. 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 Apostilbs = 0.000318 Kilocandela per Square Meter.
Consistency rule: calculator output and table values use the same constants and rounding policy.

Common Conversion Values

Apostilbs (asb)	Kilocandela per Square Meter (kcd/m2)
1	0.000318
5	0.001592
10	0.003183
25	0.007958
50	0.015915
100	0.031831
250	0.079577
500	0.159155
1000	0.31831

Questions & answers

Frequently Asked Questions

Why is Apostilbs 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 apostilbs 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 Apostilbs to Kilocandela per Square Meter?

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