Photometry & ImagingApostilbs to Nits

Apostilbs to Nits

Methodology·How We Verify

Snapshot

1 Apostilbs equals 0.31831 Nits.

Reference basis: This conversion uses fixed luminance constants anchored to candela per square meter.
Example: For 5 Apostilbs, the result equals 1.591549 Nits.

Interactive conversion

Converter Calculator

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

0.31831 Nits (nit)

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API and AI agent access

Apostilbs to Nits.

Machine-readable identifiers

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

Essential response

{
  "ok": true,
  "conversion": {
    "family": "photometry-imaging",
    "value": 1,
    "from": "apostilbs",
    "to": "nits",
    "result": {
      "raw": 0.318309886184,
      "display": "0.31831"
    },
    "canonicalPath": "/photometry-imaging/apostilbs-to-nits/"
  }
}

API, OpenAPI and WebMCP documentation

Explanation

The converter converts apostilbs into nits by normalizing both luminance units through candela per square meter. Formula: nit = asb × 0.318309886184. 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 = 0.31831 Nits.
Consistency rule: calculator output and table values use the same constants and rounding policy.

Common Conversion Values

Apostilbs (asb)	Nits (nit)
1	0.31831
5	1.591549
10	3.183099
25	7.957747
50	15.915494
100	31.830989
250	79.577472
500	159.154943
1000	318.309886

Questions & answers

Frequently Asked Questions

Why is Apostilbs 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 apostilbs 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 Apostilbs to Nits?

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