# LRV Contrast Calculator

> Calculates LRV contrast percentage between two materials for accessibility. (iPhone/iPad app by Behzad Gorimar.)

- Source: https://appshunter.io/ios/app/lrv-contrast-calculator/id1216079807 (this page in markdown: same URL + `.md`)
- Developer: [Behzad Gorimar](https://appshunter.io/developer/1125854088)
- Category: Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 8.0 · 3 MB
- Languages: American English
- Released: 2017-03-20
- Data updated: 2026-06-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/lrv-contrast-calculator/id1216079807/reviews.md

## What is LRV Contrast Calculator?

A good Luminance contrast can assist people with low vision in identifying important building elements such as Stairway Nosings, Doorways, Tactile Ground Surface Indicators and Signage in the built environment.

With the introduction of the ADA (Americans with Disabilities Act) and DDA (Australian Disability Discrimination Act), it is useful for Architects, Interior Designers, Disability Access Consultants and even product manufacturers to quickly calculate the required LRV contrast of adjoining materials.

Light / Luminance Reflectance Value, or LRV, is a measurement of light that is reflected from a surface. Some of the ways to find the LRV are by means of a colorimeter, spectrophotometer or directly by the manufacturer (for example, LRV noted on a fan deck provided by a paint manufacturer). 

LRV / Luminance Contrast is the light reflected from one surface as compared to the light reflected from another surface. This app calculates the percentage difference required when the LRV of any two samples are know. For example, if you have the LRV of the color of the door frame and the LRV of the color of the door, you can use this calculator to determine the contrast in % based on the formulas used in either USA or Australia.

The Americans with Disability Act Accessibility Guidelines (ADAAG) recommends a 70% LRV or higher for those with impaired vision and Australian / New Zealand Standard AS/NZ 1428.4.1-2009 requires LRV contrast in a range of 30% to 60% based on the type of building elements.

## Key features

- Calculates LRV contrast percentage
- Supports USA (ADA) and Australia (AS/NZ) formulas
- Useful for architects and designers
- Helps identify building elements for low vision
- Meets accessibility standards

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/lrv-contrast-calculator/id1216079807/reviews.md

### 5/5 — Luminance contrast

*2017-04-12*

This app is great to determine the luminance contrast requirements for compliance with DDA and the APS 2010. It provides the application of 30% to 60% as set out by the AS suite.
Saves a lot of time and money at design stage for architects and interior designers, but also great for checking at completion of a project by applying the LRV value attached to the colour swatch.

## Frequently asked questions about LRV Contrast Calculator

### What is LRV Contrast Calculator used for?

LRV Contrast Calculator helps determine the percentage difference in light reflectance between two materials. This is crucial for ensuring adequate contrast for individuals with low vision, as recommended by accessibility standards like the ADA and AS/NZ.

### Who benefits from using LRV Contrast Calculator?

Professionals such as architects, interior designers, disability access consultants, and product manufacturers benefit from this tool. It assists them in meeting accessibility requirements for building elements and products.

### Does LRV Contrast Calculator support different accessibility standards?

Yes, the calculator supports formulas used in both the USA (Americans with Disabilities Act - ADA) and Australia/New Zealand (Standard AS/NZ 1428.4.1-2009). This allows for compliance with regional accessibility guidelines.

### How does LRV Contrast Calculator help people with low vision?

By calculating the LRV contrast, the app ensures that important building elements like stair nosings, doorways, and signage have sufficient visual distinction. This aids individuals with impaired vision in navigating and identifying these elements.

### What are the recommended LRV contrast ranges?

The Americans with Disability Act Accessibility Guidelines (ADAAG) recommend 70% LRV or higher. The Australian/New Zealand Standard AS/NZ 1428.4.1-2009 requires LRV contrast in a range of 30% to 60%, depending on the building element.

### How is LRV measured for use in the app?

LRV, or Luminance Reflectance Value, is a measurement of light reflected from a surface. It can be found using a colorimeter, spectrophotometer, or directly from the manufacturer, often noted on resources like a paint manufacturer's fan deck.

### Is LRV Contrast Calculator available on multiple devices?

LRV Contrast Calculator is available for iPhone, iPad, and iPod devices, making it accessible to a wide range of Apple users.

### When was LRV Contrast Calculator last updated?

The latest version of LRV Contrast Calculator was released on August 28, 2019. The app was initially released on March 20, 2017.

## Version history (last 2 releases)

### 1.1.2 — 2019-08-28

Minor UI changes

### 1.0.1 — 2017-03-20

No release notes.

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All apps by Behzad Gorimar: https://appshunter.io/developer/1125854088

## Related topics

[lrv contrast calculator](https://appshunter.io/ios/topics/lrv-contrast-calculator)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*