NDRE Calculator
Calculate Normalized Difference Red Edge Index instantly for advanced vegetation analysis and precision agriculture monitoring.
Data Input
Enter reflectance values (typically 0.0 to 1.0)
NDRE Result
0.0000
Rounded: 0.00
Awaiting Input
-1 (Water/Non-Veg)
0
+1 (Dense Veg)
NDRE = (NIR - RedEdge) / (NIR + RedEdge)
What is NDRE?
The Normalized Difference Red Edge (NDRE) is a vegetation index that utilizes the Near-Infrared (NIR) and Red Edge spectral bands. It is highly sensitive to chlorophyll content in leaves and is less prone to saturation in dense canopies compared to the traditional NDVI.
NDRE is widely used in remote sensing and precision agriculture for monitoring crop health, estimating nitrogen requirements, and mapping vegetation stress during mid-to-late growth stages.
NDRE Formula
NDRE = (NIR - Red Edge) / (NIR + Red Edge)
How to Use
- Input the NIR Reflectance value extracted from your satellite imagery or sensor data.
- Input the Red Edge Reflectance value.
- Click Calculate NDRE to see the result, category, and visual gauge.
- Use the Export buttons to save your calculations.
Disclaimer: NDRE is a spectral indicator, not a direct medical diagnosis of plant conditions. Interpretation of results must consider sensor type, atmospheric conditions, preprocessing methods, plant species, and local context. The categorization provided is a general guideline.
Calculation History
| Time | NIR | Red Edge | NDRE | Category | Action |
|---|---|---|---|---|---|
| No history available. | |||||