Convert Lux to Kilolux (lx to klx)
1 lux (lx) = 0.001 kilolux (klx). 1 klx = 1000 lx. Example: 15 lx = 15 × 0.001 = 0.015 klx.
Also searched as lux to klx, lux in klx, lux into kilolux, lx to klx, lx in kilolux, lx into kilolux, lux to kilolux, lx to kilolux converter and how many kilolux in a lux.
1 lx = 0.001 klx
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk lux to kilolux converter to paste a column from Excel.
How to Convert Lux to Kilolux
- 1 lx = 0.001 klx
- 1 klx = 1000 lx
- Example: convert 15 lx to klx: 15 lx = 15 × 0.001 klx = 0.015 klx
Formula
klx = lx ÷ 1000
Derivation from SI units:
- 1 lx = 1 lm/m².
- 1 klx = 10³ lx.
Both units are defined exactly, so the factor is exact. Lux definition: lux; Kilolux definition: kilolux.
Worked examples
- A reading of 100 lx converts to 0.1 klx.
100 lx × 0.001 = 0.1 klx - A value of 750 lx is 0.75 klx.
750 lx × 0.001 = 0.75 klx
Lux to Kilolux conversion table
| Lux (lx) | Kilolux (klx) |
|---|---|
| 1 lx | 0.001 klx |
| 10 lx | 0.01 klx |
| 50 lx | 0.05 klx |
| 100 lx | 0.1 klx |
| 300 lx | 0.3 klx |
| 500 lx | 0.5 klx |
| 750 lx | 0.75 klx |
| 1000 lx | 1 klx |
| 10000 lx | 10 klx |
| 100000 lx | 100 klx |
Where it's used
Lux are used for workplace lighting standards (EN 12464), while kilolux appear in daylight and solar measurements. Both measure illuminance (light falling on a surface), so the conversion is a fixed factor.
Lux to other illuminance units
| Conversion | 1 lx equals |
|---|---|
| lux to kilolux | 0.001 klx |
| lux to foot-candle | 0.09290304 fc |
| lux to phot | 0.0001 ph |
| lux to millilux | 1000 mlx |
Frequently asked questions
How many kilolux are in 1 lux?
1 lx = 0.001 klx.
How do I convert lux to kilolux?
Multiply the value in lx by 0.001, or divide it by 1000. For example, 15 lx × 0.001 = 0.015 klx.
Is the lx to klx conversion exact?
Yes. Both units are defined exactly, and 1 lx is exactly 0.001 klx.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (becquerel, gray, sievert, lux) and Table 2 (candela).
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Lux to Kilolux (lx to klx). Retrieved October 25, 2026, from https://scientificconverters.com/illuminance/lux-to-kilolux/
IEEE
Scientific Converters, "Convert Lux to Kilolux (lx to klx)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/illuminance/lux-to-kilolux/