Kilolux to Phots Converter
Enter the illumination in kilolux below to convert it to phots.
Convert Kilolux to Phots
Enter a value in kilolux (klx) to convert to phots (ph).
Kilolux to Phot Conversion Table
Table showing various kilolux measurements converted to phots. Click any preset value or arrow to load it into the converter.
How to Convert Kilolux to Phots
To convert kilolux to phots, multiply the illumination by the following conversion ratio: 0.1 phots/kilolux.
Since one kilolux is equal to 0.1 phots, you can use this simple formula to convert:
The illumination in phots is equal to the illumination in kilolux multiplied by 0.1.
For example, here's how to convert 5 kilolux to phots using the formula above.
How Many Phots Are in a Kilolux?
There are 0.1 phots in a kilolux, which is why we use this value in the formula above.
Our kilolux to phot calculator automatically converts your illumination measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Kilolux and phots are both units used to measure illumination. Keep reading to learn more about each unit.
What Is a Kilolux?
A kilolux is a unit of illumination equal to 1,000 lux (lx), the base unit for illumination. Equal to 1,000 lux (outdoor daylight benchmark). [1]
The kilolux is classified as a metric and SI-compatible unit of illumination. Kilolux can be abbreviated as klx; for example, 1 kilolux can be written as 1 klx.
In the metric system, "kilo" is the standard SI prefix for thousands, or 10³. This makes the kilolux (klx) a convenient decimal multiple of the lux (lx).
In practice, kilolux (klx) are widely used across large-scale industrial, bulk, and macro-level illumination specifications within SI metric workflows, engineering documentation, and technical data sheets.
What Is a Phot?
A phot is a unit of illumination equal to 10,000 lux (lx), the base unit for illumination. CGS illuminance unit equal to 10,000 lux. [2]
The phot is classified as a metric and SI-compatible unit of illumination. Phots can be abbreviated as ph; for example, 1 phot can be written as 1 ph.
When working with phots (ph) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, phots (ph) are widely used across large-scale industrial, bulk, and macro-level illumination specifications within SI metric workflows, engineering documentation, and technical data sheets.
When converting illumination between kilolux (klx) and phots (ph), keep full floating-point precision (1 klx = 0.1 ph; 1 ph = 10 klx) during intermediate calculations and round only the final phot figure to match your instrument tolerance.
More Kilolux & Phot Conversions
Need to calculate in the opposite direction? Use our phots to kilolux calculator to switch your starting unit immediately. You can also explore related tools such as converting phots to kilolux, converting kilolux to lux, or converting lux to kilolux.
Convert from Kilolux
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Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Illumination Metrology Standard — Kilolux (klx) to Phots (ph)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Kilolux (klx) & Phot (lm/cm²) (ph)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (klx to ph)