Illuminance Converter

Illuminance Converter

Illuminance Converter is a handy tool you can use online to convert different units of light measurement. It can help you convert lumen per square meter, lumen per square centimeter, foot candle, foot lambert, and more.

Understanding Illuminance Converter: Shedding Light on Light Measurements

Have you ever wondered how bright a room is or how much light is falling on a surface? Well, scientists and engineers have a way to measure this using a tool called an "illuminance converter." In this article, we'll explore what an illuminance converter is, why it's important, and how it works.

What is Illuminance?

Before diving into the illuminance converter, let's first understand what illuminance is. Illuminance refers to the amount of light that falls on a given surface. It tells us how bright or dim an area is. You've probably heard terms like "lux" or "foot-candle" when people talk about illuminance. These are the units used to measure illuminance.

Lux is the metric unit used to measure illuminance in the International System of Units (SI). It represents one lumen per square meter. Lumen is a measure of the total quantity of visible light emitted by a source.

Foot-candle, on the other hand, is the imperial unit used to measure illuminance. It represents one lumen per square foot.

In simple terms, illuminance tells us how much light is falling on a surface, which is crucial for various applications, including architecture, interior design, and even plant growth.

What is an Illuminance Converter?

An illuminance converter is a tool or calculator that helps us convert illuminance measurements from one unit to another. This can be particularly useful when working on projects that involve lighting, as different countries and industries may use different units of measurement.

For example, if you're an architect designing a building in a country that uses lux as the standard unit for illuminance, but your lighting fixtures are labeled in foot-candles, you would need to convert between these units to ensure proper lighting in your design.

Why is an Illuminance Converter Important?

  1. Global Compatibility: Different countries and regions may use different units for illuminance. The use of an illuminance converter ensures that lighting professionals and engineers can work together seamlessly on projects regardless of where they are located.

  2. Industry Standards: Different industries may have their own preferred units for illuminance. For example, the film and photography industry often use foot-candles, while the automotive industry may use lux. An illuminance converter allows professionals to conform to industry standards.

  3. Efficient Planning: Architects, interior designers, and lighting engineers need accurate illuminance measurements to plan lighting schemes effectively. Using an illuminance converter, they can easily convert measurements to their preferred unit for precise planning.

How Does an Illuminance Converter Work?

Now that we know why an illuminance converter is important, let's take a closer look at how it works. Fortunately, you don't need to do complex calculations yourself; there are online tools and apps that can do this for you. However, it's still valuable to understand the basic principles.

The conversion between lux and foot-candles is relatively straightforward because it involves a simple ratio. Here's the basic formula:

1 foot-candle (fc) = 10.76 lux (lx)

This means that one foot-candle is equivalent to approximately 10.76 lux. So, to convert from foot-candles to lux, you multiply the foot-candle value by 10.76. Conversely, to convert from lux to foot-candles, you divide the lux value by 10.76.

Let's look at an example:

Suppose you have a lighting fixture that provides an illuminance of 500 lux. To convert this to foot-candles, you would use the formula:

Illuminance in foot-candles (fc) = Illuminance in lux (lx) / 10.76

So, in this case:

Illuminance in fc = 500 lx / 10.76 ≈ 46.5 fc

This means that the illuminance is approximately 46.5 foot-candles.

Practical Uses of Illuminance Conversion

Now that we know how to convert illuminance units, let's explore some practical applications where this knowledge can be helpful:

  1. Architectural Lighting Design: Architects use illuminance measurements to plan the lighting of buildings and interiors. Converting between units allows them to work with lighting fixtures from various sources and manufacturers.

  2. Photography and Filmmaking: Photographers and filmmakers often use foot-candles to determine the proper lighting for a scene. When using equipment labeled in lux, conversion is essential for setting up the right lighting conditions.

  3. Plant Growth: Indoor gardeners and horticulturists need to provide the right amount of light for plant growth. Illuminance measurements help them adjust artificial lighting to mimic natural sunlight. Converting units ensures accurate control of light intensity.

  4. Workplace Safety: In industrial settings, it's crucial to maintain proper lighting levels for worker safety. Knowing how to convert illuminance measurements allows for compliance with safety regulations, which may specify lux or foot-candles.

  5. Energy Efficiency: Energy-efficient lighting design relies on optimizing illuminance levels. By converting between units, engineers can make informed decisions to reduce energy consumption while maintaining adequate lighting.


An illuminance converter is a valuable tool that simplifies the process of converting illuminance measurements between different units, such as lux and foot-candles. It plays a crucial role in various industries and applications, from architecture and photography to plant growth and workplace safety. Understanding how illuminance conversion works can help professionals make informed decisions and ensure that the right amount of light is provided in various settings. So, the next time you're working with lighting, remember that the illuminance converter is there to shed light on your measurements!


Azahar Ahmed

CEO / Co-Founder

I am Azahar Ahmed, a youthful Engineer, Entrepreneur, Digital Marketer, and Motivational speaker native to Nagaon, Assam, India. Originating from a middle-class background, I am the sole son. My accomplishments are indebted to my father, a Teacher, and my mother, formerly a Teacher but now devoted to our well-being. My mother has been my closest ally, and unitedly, my parents have fostered and realized all my aspirations, epitomizing the perfect parents.

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