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Convert Millilamberts to Apostilbs

Millilambert (mL) to Apostilb (asb) luminance conversion — enter any value below to get an instant result, or use the table for common values.

Results from this calculator are estimates provided for general informational purposes only, based on formulas, rates, and standards commonly accepted as of 2026. Figures may differ slightly from other calculators or professional sources due to rounding methods, differing assumptions, or regional regulations, and rules may change over time. Always consult a qualified professional — such as a financial advisor, healthcare provider, or other relevant specialist — before making decisions based on these results.

The numeric value you want to convert. Decimals are accepted.

Result

1 mL = 10 asb

1 Millilambert = 10 Apostilbs

1 Apostilb = 0.1 Millilamberts

1 mL in every supported unit

Conversion chart: Millilambert to Apostilbs

Conversion table

Millilambert (mL) Apostilb (asb)
0.01 mL 0.1 asb
0.1 mL 1 asb
1 mL 10 asb
2 mL 20 asb
3 mL 30 asb
5 mL 50 asb
10 mL 100 asb
20 mL 200 asb
50 mL 500 asb
100 mL 1000 asb
1000 mL 10000 asb

Millilambert (mL)

Definition: One-thousandth of a lambert, offering a more practically sized CGS luminance unit for typical indoor and screen-brightness magnitudes than the full lambert.

History: Introduced as the lambert proved too large a unit for everyday luminance readings — most real-world surfaces and early cathode-ray displays measured in the millilambert range rather than whole lamberts.

Current use: Historically used in early display and photometric engineering, including some vintage radar and oscilloscope screen brightness specifications, before nits and foot-lamberts became standard.

Apostilb (asb)

Definition: A CGS-system luminance unit defined so that a perfectly diffusing surface illuminated at one lux has a luminance of one apostilb — related to the lambert by a factor of 10,000.

History: Introduced in early 20th-century European photometry (the name from Greek "apo-" plus "stilb") as a more conveniently scaled alternative to the stilb for typical illuminated, rather than self-luminous, surfaces.

Current use: Still used in some European ophthalmology and vision science literature, particularly in perimetry equipment that measures visual field sensitivity in apostilbs.

Supported Units

Unit Symbol In cd/m²
Candela per Square Meter cd/m² 1 cd/m²
Candela per Square Centimeter cd/cm² 10000 cd/m²
Candela per Square Foot cd/ft² 10.76391 cd/m²
Candela per Square Inch cd/in² 1550.0031 cd/m²
Kilocandela per Square Meter kcd/m² 1000 cd/m²
Stilb sb 10000 cd/m²
Lumen per Square Meter per Steradian lm/m²/sr 1 cd/m²
Lumen per Square Centimeter per Steradian lm/cm²/sr 10000 cd/m²
Lumen per Square Foot per Steradian lm/ft²/sr 10.76391 cd/m²
Watt per Square Centimeter per Steradian (at 555 nm) W/cm²/sr 6830000 cd/m²
Nit nt 1 cd/m²
Millinit mnt 0.001 cd/m²
Lambert L 3183.0989 cd/m²
Millilambert mL 3.1830989 cd/m²
Foot-Lambert fL 3.4262591 cd/m²
Apostilb asb 0.31830989 cd/m²
Blondel bd 0.31830989 cd/m²
Bril bril 3.1831E-08 cd/m²
Skot sk 0.0003183099 cd/m²

About These Parameters

Value
The luminance value you want to convert, expressed in the "From" unit. Accepts decimals, so you can enter anything from a faint scotopic reading in skots to a display's rated brightness in nits.
From Unit
The unit your input value is currently measured in — a monitor spec sheet's nits, a cinema calibration report's foot-lamberts, or a scientific instrument's candela per square meter.
To Unit
The unit you want the result converted into. Use the swap button to flip From and To instantly and compare figures across display, cinema, and scientific contexts.

How Luminance Conversion Works

The Formula

Every unit here is defined by a fixed multiplier relative to candela per square meter. To convert a value from one unit to another:

result = value × (factor of "From" unit ÷ factor of "To" unit)

For Millilambert → Apostilb: multiply by 10. For example, 1 mL × 10 = 10 asb.

Nits vs. Candela per Square Meter

A nit and a candela per square meter are exactly the same physical quantity — "nit" is simply the shorter, everyday name adopted by the display and consumer electronics industry. When a phone, TV, or monitor spec sheet quotes "1,000 nits," that number is identical to 1,000 cd/m² in a scientific paper. The two names exist for context, not physics: engineers and physicists tend to write cd/m², while marketing copy, review sites, and display datasheets almost universally write nits.

CGS vs. SI Luminance Units

Several units on this page — the stilb, lambert, apostilb, blondel, bril, and skot — predate the modern SI system and come from the centimeter-gram-second (CGS) system of photometric units used in early 20th-century physics. They were built around the idea of a perfectly diffusing ("Lambertian") surface rather than the candela directly, which is why their conversion factors to cd/m² involve π-related constants (a lambert, for instance, equals 1/π candela per square centimeter). Most of these CGS units have been superseded by candela-per-square-meter and its nit alias in modern engineering, but they still surface in legacy scientific literature, older photometric instruments, and specialized fields like vision research that never fully migrated to SI.

Example

A luminance of 1 mL equals 10 asb. For scale, a typical smartphone screen runs around 500-1,000 nits, a calibrated cinema screen is set to roughly 14-16 foot-lamberts, an overcast sky reads around 2,000-4,000 cd/m², and the full moon's surface luminance is only about 2,500 cd/m² despite looking far brighter against a dark night sky.

Frequently Asked Questions

How many Apostilbs are in 1 Millilambert?

1 Millilambert (mL) equals exactly 10 Apostilbs (asb).

What's the difference between luminance and brightness?

Luminance is the objective, physically measured quantity — candela per square meter, or nits — while "brightness" is often used loosely to describe the subjective perception of how light a surface looks, which also depends on surrounding contrast and the viewer's eye adaptation. Luminance is what a light meter measures; brightness is what a person reports seeing.

Is a nit the same as a candela per square meter?

Yes — a nit and a candela per square meter (cd/m²) are exactly the same unit under two different names. "Nit" is the informal name used throughout the display and consumer electronics industry, while cd/m² is the formal SI name used in scientific and engineering contexts.

Why do cinema screens use foot-lamberts instead of nits?

The film and projection industry standardized on foot-lamberts decades before nits became common in consumer electronics, and SMPTE calibration standards for theatrical and home-theater screens (typically 14-16 foot-lamberts) are still written in that unit today. Converting to nits (1 fL ≈ 3.43 cd/m²) shows that cinema screens are actually much dimmer than a modern smartphone or TV display, which is intentional for a dark viewing room.

Why are there so many old CGS luminance units like the stilb and apostilb?

Before the SI system standardized photometry around the candela and candela-per-square-meter in the mid-20th century, different countries and scientific traditions developed their own luminance units within the centimeter-gram-second (CGS) system — the stilb and lambert in general use, the apostilb and its French-system twin the blondel for illuminated surfaces, and the extremely small bril and skot for vision research into low-light perception. Most have fallen out of everyday use but still appear in older instruments, legacy literature, and specialized scientific fields.

How accurate are these conversions?

Every conversion factor used here is the exact, internationally recognized relationship between the underlying luminance units — results are limited only by floating-point display precision, not by rounded conversion constants.

Convert Millilambert to Other Luminance Units

Millilambert to Candela per Square Meter Millilambert to Candela per Square Centimeter Millilambert to Candela per Square Foot Millilambert to Candela per Square Inch Millilambert to Kilocandela per Square Meter Millilambert to Stilbs Millilambert to Lumens per Square Meter per Steradian Millilambert to Lumens per Square Centimeter per Steradian Millilambert to Lumens per Square Foot per Steradian Millilambert to Watts per Square Centimeter per Steradian (at 555 nm) Millilambert to Nits Millilambert to Millinits Millilambert to Lamberts Millilambert to Foot-Lamberts Millilambert to Apostilbs Millilambert to Blondels Millilambert to Brils Millilambert to Skots

Possible Luminance Conversions

Candela per Square Meter to Candela per Square Centimeter Foot-Lambert to Watts per Square Centimeter per Steradian (at 555 nm) Skot to Candela per Square Centimeter Apostilb to Lumens per Square Foot per Steradian Millinit to Skots Candela per Square Inch to Millilamberts Skot to Lumens per Square Meter per Steradian Bril to Lumens per Square Foot per Steradian Candela per Square Foot to Millinits Watt per Square Centimeter per Steradian (at 555 nm) to Candela per Square Foot Nit to Lumens per Square Foot per Steradian Blondel to Candela per Square Inch Lambert to Kilocandela per Square Meter Candela per Square Foot to Candela per Square Meter Candela per Square Meter to Millinits Candela per Square Inch to Lumens per Square Meter per Steradian Candela per Square Foot to Kilocandela per Square Meter Bril to Candela per Square Meter Millilambert to Lumens per Square Foot per Steradian Lumen per Square Centimeter per Steradian to Skots Candela per Square Meter to Skots Millilambert to Watts per Square Centimeter per Steradian (at 555 nm) Bril to Watts per Square Centimeter per Steradian (at 555 nm) Candela per Square Centimeter to Watts per Square Centimeter per Steradian (at 555 nm) Kilocandela per Square Meter to Blondels Watt per Square Centimeter per Steradian (at 555 nm) to Millilamberts Foot-Lambert to Lamberts Blondel to Foot-Lamberts Lambert to Candela per Square Inch Millilambert to Blondels Nit to Blondels Bril to Candela per Square Inch Millinit to Candela per Square Foot Millinit to Lumens per Square Centimeter per Steradian Bril to Kilocandela per Square Meter Candela per Square Meter to Nits Candela per Square Inch to Nits Bril to Lumens per Square Centimeter per Steradian Nit to Watts per Square Centimeter per Steradian (at 555 nm) Apostilb to Brils Watt per Square Centimeter per Steradian (at 555 nm) to Nits Candela per Square Meter to Millilamberts Millilambert to Candela per Square Meter Millilambert to Skots Kilocandela per Square Meter to Lumens per Square Foot per Steradian Nit to Apostilbs Candela per Square Foot to Skots Candela per Square Foot to Brils Candela per Square Meter to Brils Apostilb to Skots Apostilb to Millilamberts Nit to Skots Kilocandela per Square Meter to Candela per Square Foot Lumen per Square Centimeter per Steradian to Candela per Square Meter Millilambert to Lamberts Millinit to Nits Millilambert to Brils Foot-Lambert to Nits Watt per Square Centimeter per Steradian (at 555 nm) to Apostilbs Skot to Blondels Nit to Lamberts Blondel to Brils Watt per Square Centimeter per Steradian (at 555 nm) to Millinits Stilb to Lumens per Square Foot per Steradian Bril to Stilbs Kilocandela per Square Meter to Foot-Lamberts Lumen per Square Meter per Steradian to Candela per Square Meter Lumen per Square Meter per Steradian to Lumens per Square Centimeter per Steradian Apostilb to Millinits Millinit to Candela per Square Inch Nit to Kilocandela per Square Meter Skot to Lumens per Square Foot per Steradian Candela per Square Centimeter to Candela per Square Inch Candela per Square Meter to Candela per Square Foot Candela per Square Centimeter to Blondels Lumen per Square Foot per Steradian to Candela per Square Inch Stilb to Candela per Square Inch Nit to Candela per Square Foot Lumen per Square Meter per Steradian to Stilbs Lumen per Square Centimeter per Steradian to Candela per Square Foot Candela per Square Foot to Lumens per Square Centimeter per Steradian Candela per Square Inch to Candela per Square Meter Skot to Nits Kilocandela per Square Meter to Millilamberts Lumen per Square Foot per Steradian to Brils Lambert to Candela per Square Meter Kilocandela per Square Meter to Millinits Skot to Watts per Square Centimeter per Steradian (at 555 nm) Millinit to Watts per Square Centimeter per Steradian (at 555 nm) Apostilb to Lamberts Candela per Square Foot to Nits Millinit to Lumens per Square Meter per Steradian Apostilb to Lumens per Square Meter per Steradian Stilb to Candela per Square Centimeter Candela per Square Inch to Lamberts Skot to Lumens per Square Centimeter per Steradian Candela per Square Foot to Apostilbs Candela per Square Centimeter to Millinits Candela per Square Centimeter to Nits Lambert to Blondels Candela per Square Centimeter to Stilbs Nit to Candela per Square Inch Watt per Square Centimeter per Steradian (at 555 nm) to Brils Foot-Lambert to Lumens per Square Meter per Steradian Candela per Square Meter to Blondels Candela per Square Centimeter to Candela per Square Foot Candela per Square Meter to Lumens per Square Centimeter per Steradian Lumen per Square Foot per Steradian to Candela per Square Meter Blondel to Apostilbs Lambert to Skots Stilb to Lamberts Foot-Lambert to Skots Blondel to Nits Lambert to Watts per Square Centimeter per Steradian (at 555 nm) Lumen per Square Foot per Steradian to Stilbs Lumen per Square Foot per Steradian to Nits Lambert to Candela per Square Foot Candela per Square Foot to Blondels Candela per Square Foot to Candela per Square Centimeter Lambert to Candela per Square Centimeter Bril to Millilamberts Stilb to Blondels Lumen per Square Meter per Steradian to Apostilbs Candela per Square Centimeter to Lumens per Square Foot per Steradian Watt per Square Centimeter per Steradian (at 555 nm) to Stilbs Candela per Square Inch to Watts per Square Centimeter per Steradian (at 555 nm) Blondel to Kilocandela per Square Meter Millilambert to Foot-Lamberts Lambert to Nits Lumen per Square Meter per Steradian to Watts per Square Centimeter per Steradian (at 555 nm) Candela per Square Foot to Lamberts Candela per Square Inch to Apostilbs Nit to Millinits Candela per Square Inch to Kilocandela per Square Meter Bril to Nits Candela per Square Foot to Lumens per Square Foot per Steradian Skot to Candela per Square Foot Foot-Lambert to Candela per Square Foot Lumen per Square Meter per Steradian to Lamberts Skot to Stilbs Watt per Square Centimeter per Steradian (at 555 nm) to Candela per Square Centimeter Candela per Square Foot to Candela per Square Inch Candela per Square Meter to Watts per Square Centimeter per Steradian (at 555 nm) Lumen per Square Meter per Steradian to Candela per Square Centimeter Candela per Square Centimeter to Kilocandela per Square Meter Apostilb to Candela per Square Foot Apostilb to Lumens per Square Centimeter per Steradian Blondel to Candela per Square Centimeter Lumen per Square Centimeter per Steradian to Watts per Square Centimeter per Steradian (at 555 nm) Candela per Square Centimeter to Lumens per Square Centimeter per Steradian Lambert to Lumens per Square Meter per Steradian Lumen per Square Foot per Steradian to Millilamberts Blondel to Candela per Square Foot Lumen per Square Foot per Steradian to Lumens per Square Centimeter per Steradian Skot to Kilocandela per Square Meter Bril to Blondels Stilb to Millinits Millilambert to Candela per Square Centimeter Candela per Square Foot to Millilamberts Candela per Square Meter to Foot-Lamberts Lambert to Foot-Lamberts Lambert to Lumens per Square Centimeter per Steradian Candela per Square Inch to Blondels Kilocandela per Square Meter to Nits Foot-Lambert to Brils Bril to Candela per Square Foot Lumen per Square Foot per Steradian to Lumens per Square Meter per Steradian Candela per Square Centimeter to Candela per Square Meter Bril to Skots Watt per Square Centimeter per Steradian (at 555 nm) to Lumens per Square Meter per Steradian Apostilb to Candela per Square Centimeter Foot-Lambert to Candela per Square Centimeter Lumen per Square Centimeter per Steradian to Lamberts Blondel to Millilamberts Lumen per Square Foot per Steradian to Apostilbs Nit to Brils Kilocandela per Square Meter to Lumens per Square Meter per Steradian Lumen per Square Centimeter per Steradian to Brils Stilb to Apostilbs Nit to Candela per Square Centimeter Watt per Square Centimeter per Steradian (at 555 nm) to Lamberts Foot-Lambert to Stilbs Foot-Lambert to Candela per Square Inch Foot-Lambert to Lumens per Square Foot per Steradian Blondel to Lamberts Candela per Square Inch to Stilbs Candela per Square Foot to Lumens per Square Meter per Steradian Millilambert to Nits Lumen per Square Centimeter per Steradian to Millilamberts Nit to Candela per Square Meter Lambert to Lumens per Square Foot per Steradian Kilocandela per Square Meter to Brils Kilocandela per Square Meter to Stilbs Stilb to Watts per Square Centimeter per Steradian (at 555 nm) Nit to Millilamberts Stilb to Skots Millilambert to Candela per Square Foot Kilocandela per Square Meter to Candela per Square Meter Lumen per Square Centimeter per Steradian to Candela per Square Inch Foot-Lambert to Candela per Square Meter Candela per Square Centimeter to Skots Candela per Square Centimeter to Millilamberts Millilambert to Apostilbs Blondel to Watts per Square Centimeter per Steradian (at 555 nm) Lumen per Square Meter per Steradian to Kilocandela per Square Meter Watt per Square Centimeter per Steradian (at 555 nm) to Candela per Square Inch Millinit to Stilbs Lumen per Square Meter per Steradian to Candela per Square Foot Candela per Square Inch to Millinits Candela per Square Centimeter to Lumens per Square Meter per Steradian Nit to Foot-Lamberts Lumen per Square Meter per Steradian to Foot-Lamberts Bril to Foot-Lamberts Kilocandela per Square Meter to Lumens per Square Centimeter per Steradian Millinit to Foot-Lamberts Kilocandela per Square Meter to Apostilbs Lambert to Stilbs Watt per Square Centimeter per Steradian (at 555 nm) to Lumens per Square Centimeter per Steradian Watt per Square Centimeter per Steradian (at 555 nm) to Foot-Lamberts Foot-Lambert to Lumens per Square Centimeter per Steradian Watt per Square Centimeter per Steradian (at 555 nm) to Blondels Lambert to Apostilbs Apostilb to Blondels Watt per Square Centimeter per Steradian (at 555 nm) to Candela per Square Meter Candela per Square Centimeter to Foot-Lamberts Apostilb to Stilbs Candela per Square Meter to Lumens per Square Meter per Steradian Lumen per Square Meter per Steradian to Millinits Kilocandela per Square Meter to Candela per Square Centimeter Candela per Square Inch to Foot-Lamberts Stilb to Nits Blondel to Candela per Square Meter Blondel to Lumens per Square Foot per Steradian Stilb to Candela per Square Meter Lumen per Square Meter per Steradian to Blondels Stilb to Brils Candela per Square Centimeter to Brils Lumen per Square Centimeter per Steradian to Millinits Skot to Candela per Square Meter Candela per Square Foot to Stilbs Foot-Lambert to Millinits Candela per Square Meter to Candela per Square Inch Apostilb to Candela per Square Meter Lumen per Square Centimeter per Steradian to Apostilbs Lambert to Millilamberts Watt per Square Centimeter per Steradian (at 555 nm) to Skots Lumen per Square Centimeter per Steradian to Nits Blondel to Skots Kilocandela per Square Meter to Skots Candela per Square Meter to Lumens per Square Foot per Steradian Candela per Square Meter to Kilocandela per Square Meter Candela per Square Inch to Lumens per Square Centimeter per Steradian Watt per Square Centimeter per Steradian (at 555 nm) to Lumens per Square Foot per Steradian Lambert to Brils Kilocandela per Square Meter to Watts per Square Centimeter per Steradian (at 555 nm) Lumen per Square Meter per Steradian to Skots Skot to Candela per Square Inch Lumen per Square Foot per Steradian to Watts per Square Centimeter per Steradian (at 555 nm) Bril to Lamberts Skot to Millinits Millilambert to Lumens per Square Meter per Steradian Lumen per Square Centimeter per Steradian to Foot-Lamberts Bril to Millinits Lumen per Square Centimeter per Steradian to Candela per Square Centimeter Millinit to Apostilbs Millinit to Kilocandela per Square Meter Millilambert to Lumens per Square Centimeter per Steradian Lumen per Square Centimeter per Steradian to Kilocandela per Square Meter Lumen per Square Foot per Steradian to Kilocandela per Square Meter Lumen per Square Centimeter per Steradian to Blondels Candela per Square Inch to Lumens per Square Foot per Steradian Millilambert to Candela per Square Inch Kilocandela per Square Meter to Lamberts Skot to Millilamberts Apostilb to Foot-Lamberts Bril to Lumens per Square Meter per Steradian Candela per Square Meter to Stilbs Foot-Lambert to Millilamberts Millilambert to Kilocandela per Square Meter Millinit to Brils Lumen per Square Foot per Steradian to Millinits Foot-Lambert to Blondels Lumen per Square Foot per Steradian to Skots Candela per Square Inch to Skots Kilocandela per Square Meter to Candela per Square Inch Lumen per Square Foot per Steradian to Lamberts Skot to Apostilbs Lumen per Square Meter per Steradian to Millilamberts Candela per Square Centimeter to Lamberts Lumen per Square Meter per Steradian to Nits Bril to Apostilbs Apostilb to Watts per Square Centimeter per Steradian (at 555 nm) Stilb to Lumens per Square Centimeter per Steradian Skot to Foot-Lamberts Blondel to Millinits Stilb to Lumens per Square Meter per Steradian Watt per Square Centimeter per Steradian (at 555 nm) to Kilocandela per Square Meter Millilambert to Millinits Lumen per Square Meter per Steradian to Candela per Square Inch Millinit to Lamberts Candela per Square Inch to Brils Stilb to Foot-Lamberts Candela per Square Centimeter to Apostilbs Lumen per Square Foot per Steradian to Blondels Apostilb to Candela per Square Inch Blondel to Lumens per Square Centimeter per Steradian Lumen per Square Foot per Steradian to Foot-Lamberts Millinit to Lumens per Square Foot per Steradian Skot to Brils Apostilb to Kilocandela per Square Meter Lumen per Square Centimeter per Steradian to Stilbs Lumen per Square Centimeter per Steradian to Lumens per Square Foot per Steradian Millilambert to Stilbs Candela per Square Meter to Apostilbs Lumen per Square Foot per Steradian to Candela per Square Foot Blondel to Stilbs Lumen per Square Foot per Steradian to Candela per Square Centimeter Lumen per Square Meter per Steradian to Lumens per Square Foot per Steradian Nit to Lumens per Square Meter per Steradian Bril to Candela per Square Centimeter Millinit to Millilamberts Stilb to Millilamberts Millinit to Blondels Candela per Square Foot to Foot-Lamberts Lumen per Square Meter per Steradian to Brils Apostilb to Nits Stilb to Kilocandela per Square Meter Blondel to Lumens per Square Meter per Steradian Nit to Lumens per Square Centimeter per Steradian Nit to Stilbs Lumen per Square Centimeter per Steradian to Lumens per Square Meter per Steradian Candela per Square Inch to Candela per Square Foot Candela per Square Inch to Candela per Square Centimeter Candela per Square Meter to Lamberts Millinit to Candela per Square Centimeter Candela per Square Foot to Watts per Square Centimeter per Steradian (at 555 nm) Foot-Lambert to Apostilbs Millinit to Candela per Square Meter Foot-Lambert to Kilocandela per Square Meter Stilb to Candela per Square Foot Lambert to Millinits Skot to Lamberts

See also