Nox (nox)	Phots (ph)
1 nox	1e-7 ph
2 nox	2e-7 ph
5 nox	5e-7 ph
10 nox	0.000001 ph
25 nox	0.0000025 ph
50 nox	0.000005 ph
100 nox	0.00001 ph
250 nox	0.000025 ph
500 nox	0.00005 ph
1000 nox	0.0001 ph

Convert Nox to Phots

Convert nox to phots (nox to ph) with our instant calculator. 1 nox = 0 ph. Includes exact formula and reference tables.

How to Convert Nox to Phots (nox to ph)

1 Nox (nox) is equal to 0 Phots (ph). Divide the nox value by 10000000

Quick Answer 1 nox = 0 ph

Formula ph = nox / 10000000

Inverse Factor 1 ph = 10000000 nox

Unit Definitions & Metrology Context

The SI unit of illuminance is the lux (lx), which equals one lumen per square meter (1 lx = 1 lm/m²). It quantifies the intensity of light falling on a given surface.

About Nox (nox): Nox (nox) is a unit in the Illuminance measurement category. It is widely used in night vision & astronomy optics (1 millilux). Relative to the illuminance base unit, 1 nox equals 0.001 Lux (lx).

About Phots (ph): Phot (ph) is a unit in the Illuminance measurement category. It is widely used in cgs optical standard (10,000 lux / 1 lm/cm²). Relative to the illuminance base unit, 1 ph equals 10000 Lux (lx).

Need to convert in the opposite direction? Visit our Convert Phots to Nox (ph to nox) calculator (1 ph = 10000000 nox).

Step-by-Step Worked Examples (nox to ph)

Convert 5 Nox to Phots: Applying the formula (ph = nox / 10000000): starting with 5 nox, divide the nox value by 10000000 to get 0 ph.
Convert 10 Nox to Phots: Applying the formula (ph = nox / 10000000): starting with 10 nox, divide the nox value by 10000000 to get 0 ph.
Convert 50 Nox to Phots: Applying the formula (ph = nox / 10000000): starting with 50 nox, divide the nox value by 10000000 to get 0 ph.

Popular Illuminance Conversions

Lux ⇄ Foot-candle

Multiply lux by ~0.092903 to calculate illuminance in foot-candles (or divide lux by 10.7639).

Foot-candle ⇄ Lux

Multiply foot-candles by ~10.7639 to convert to lux (1 fc ≈ 10.764 lx).

Kilolux ⇄ Lux

1 kilolux equals exactly 1,000 lux (typical overcast daylight is 1–10 klx).

Phot ⇄ Lux

1 phot equals exactly 10,000 lux (1 lumen per square centimeter).

Frequently Asked Questions

Verified answers and formulas for converting nox to phots.

How many phots are in 1 nox?

There are 0 phots (ph) in 1 nox (nox). Conversely, 1 phot equals 10000000 nox.

How do you convert nox to phots?

To convert nox (nox) to phots (ph), use the formula: ph = nox / 10000000. Divide the nox value by 10000000. For example, 10 nox equals 0 ph.

How do I convert back from phots to nox?

To convert in the reverse direction from phots (ph) to nox (nox), use the inverse formula: nox = ph × 10000000. Multiply the phot value by 10000000 (1 ph = 10000000 nox).

What is the difference between nox (nox) and phot (ph)?

Both nox and phot measure illuminance. Nox (nox) is a unit in the Illuminance measurement category. It is widely used in night vision & astronomy optics (1 millilux). Relative to the illuminance base unit, 1 nox equals 0.001 Lux (lx). Phot (ph) is a unit in the Illuminance measurement category. It is widely used in cgs optical standard (10,000 lux / 1 lm/cm²). Relative to the illuminance base unit, 1 ph equals 10000 Lux (lx).

How do you convert foot-candles (fc) to lux (lx)?

Multiply the foot-candle value by 10.7639. For example, standard office lighting of 50 fc equals approximately 538.2 lux (50 × 10.7639 ≈ 538 lx).