NDVI (Simples)
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The NDVI (Simple) Calculator is an online tool that calculates the ratio of near-infrared (NIR) and red (RED) radiation in vegetation. This measure is essential for monitoring plant health and productivity, as well as identifying problems such as drought or diseases.
The calculation is performed using the formula (NIR−RED)/(NIR+RED), which is the mathematical definition of the Normalized Difference Vegetation Index (NDVI). This index is widely used in agriculture, ecology, and environmental sciences to evaluate plant health and productivity in different areas.
The NDVI (Simple) Calculator is a practical and easy-to-use tool that can be useful for farmers, ecologists, and scientists who need to calculate NDVI quickly and accurately. Moreover, it is essential to remember that NDVI is not a substitute for a direct visual assessment of vegetation, but can be a useful tool to complement these assessments.
When using the NDVI (Simple) Calculator, it is essential to consider common precautions, such as ensuring that NIR and RED values are measured correctly and that the formula is applied correctly. Additionally, it is essential to remember that NDVI can vary depending on the time of year, climatic variability, and the quality of the image used.
Frequently asked questions
What is the Normalized Difference Vegetation Index (NDVI)?
NDVI is a measure that evaluates the ratio of near-infrared (NIR) and red (RED) radiation in vegetation. This measure is essential for monitoring plant health and productivity, as well as identifying problems such as drought or diseases.
Why is NDVI important in agriculture and ecology?
NDVI is important in agriculture and ecology because it allows evaluating plant health and productivity in different areas, identifying problems of drought or diseases, and monitoring vegetation evolution over time.
What are the common precautions to use the NDVI (Simple) Calculator?
Common precautions include ensuring that NIR and RED values are measured correctly and that the formula is applied correctly. Additionally, it is essential to remember that NDVI can vary depending on the time of year, climatic variability, and the quality of the image used.
What is NIR and RED?
NIR is near-infrared radiation and RED is red radiation. These radiations are measured in vegetation to calculate NDVI.
Why is NDVI not a substitute for a direct visual assessment of vegetation?
NDVI is not a substitute for a direct visual assessment of vegetation because it may not capture the complexity and variety of vegetation in different areas.