IlluminanceKilolux to Phot

Kilolux to Phot

Snapshot

1 Kilolux equals 0.1 Phot. Conversion Encyclopedia uses the same fixed conversion basis across the calculator, common values, and reverse page for this page.

Reference basis: This conversion uses exact lux-based illuminance definitions.
Example: For 10 Kilolux, the result equals 1 Phot.
Use the reverse page if you need the opposite direction with the same basis.

Use the interactive calculator below for custom values and the common-value table for quick checks.

Interactive conversion

Converter Calculator

0.1 Phot (ph)

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Machine access

Available to apps and AI agents

Kilolux to Phot can be requested through Conversion Encyclopedia's structured interfaces by software and compatible AI agents. The identifiers below select the same calculation as the calculator.

Machine-readable identifiers

Conversion family: illuminance
Source unit: kilolux
Target unit: phot

The JSON API and OpenAPI specification use the identifiers to reach the conversion engine. WebMCP lets compatible AI agents request the same calculation.

Example API request and response

POST /api/v1/convert

Request

{
  "family": "illuminance",
  "value": 1,
  "from": "kilolux",
  "to": "phot"
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "illuminance",
    "value": 1,
    "from": "kilolux",
    "to": "phot",
    "result": {
      "raw": 0.1,
      "display": "0.1"
    },
    "canonicalPath": "/illuminance/kilolux-to-phot/"
  }
}

Full API documentation

Explanation

Formula: Phot = Kilolux × 0.1. Why: phot is tied exactly to lux through the square-centimeter to square-meter area relationship, so the route normalizes through lux before applying the target unit.

Kilolux (klx): an illuminance unit equal to 1,000 lux, used for bright lighting conditions, exposure references, and high-illumination environments.

Phot (ph): a CGS illuminance unit equal to one lumen per square centimeter, which is exactly 10,000 lux.

This route is useful when comparing phot-based CGS illuminance values against modern lux-based references in laboratory, optical, and legacy technical material.

This conversion is purely multiplicative because both units reduce through lux using fixed illuminance definitions with no offset.

Method & Reference

Method basis: exact conversion formula shown in Snapshot.
Applied factor: 1 Kilolux = 0.1 Phot (using exact lux-based illuminance definitions).
Consistency rule: calculator output and table values use the same constants and rounding policy.

Common Conversion Values

Kilolux (klx)	Phot (ph)
1	0.1
10	1
50	5
100	10
300	30
500	50
1,000	100
10,000	1,000

Questions & answers

Frequently Asked Questions

What is 1 kilolux in phot?

1 Kilolux equals 0.1 Phot on this page.

Does this Kilolux to Phot page use the exact lux relationship for phot?

Yes. Phot routes use the exact relationship 1 phot = 10,000 lux through one lux normalization path, so CGS and modern lighting references stay consistent across the page.

When would I convert kilolux to phot?