Luminance Converter — Instantly Convert Between Nits, Stilbs, Lamberts, Foot-Lamberts, and More for Display and Lighting Work

The Luminance Converter is a precise utility for display technicians, lighting designers, and physicists. It allows effortless conversion between standard SI units, such as candela per square meter (often called Nits), and other scientific units, such as Stilb, Lambert, and Foot-Lambert. Whether you are evaluating screen brightness, analyzing surface reflection, or comparing optical performance across different measurement systems, this tool can help you work accurately without manual calculation.

Key Features:

• Candelas per square metre (cd/m²) — the SI standard unit for luminance, commonly referred to as Nits in display and screen contexts • Stilbs (sb) — a CGS unit of luminance equal to one candela per square centimetre, typically used in scientific and physics applications • Lamberts (L) — a non-SI unit commonly encountered in older photometric literature and certain engineering references • Foot-lamberts (fL) — an imperial unit still used in cinema projection standards, display calibration, and theatrical lighting • Instant client-side conversion — results may be calculated locally in the browser without sending data to a server

How It Works:

Enter a luminance value, select your source unit, and the tool will convert it across the supported units simultaneously. Conversions are based on established relationships between SI and legacy photometric units, helping ensure consistent results whether you are working in scientific, display, or theatrical contexts.

Common Use Cases:

• Display calibration — converting between Nits and Foot-lamberts when matching screen brightness to cinema or broadcast standards • Lighting design — evaluating surface luminance values across different unit systems used by manufacturers or specification documents • Physics and optics — working with CGS units like Stilbs when reviewing scientific literature or research data • Film and theatre — checking projector output or screen gain values expressed in Foot-lamberts against modern Nit-based specifications • Academic and educational use — understanding the relationships between SI and legacy luminance units in photometry coursework

Privacy & Performance:

The Luminance Converter is designed to run directly in your browser. No luminance values or input data are transmitted to external servers, and no account or login is required.