EVI Calculator
Calculate vegetation health and canopy vigor from Blue, Red, and NIR reflectance values instantly in your browser. No server processing required.
*EVI interpretation is contextual and may vary by sensor, land cover, atmospheric conditions, and image preprocessing.
Calculation Details
Parameters used: G = 2.5, C1 = 6, C2 = 7.5, L = 1
Formula: EVI = G × (NIR − Red) / (NIR + C1 × Red − C2 × Blue + L)
EVI = 2.5 × (... − ...) / (... + 6×... − 7.5×... + 1)
EVI = 2.5 × (...) / (...)
EVI = ...
How to Use EVI Calculator
- Enter Blue reflectance: Input the surface reflectance value for the Blue band (e.g., Band 2 for Landsat 8/9).
- Enter Red reflectance: Input the surface reflectance value for the Red band (e.g., Band 4 for Landsat 8/9).
- Enter NIR reflectance: Input the surface reflectance value for the Near-Infrared band (e.g., Band 5 for Landsat 8/9).
- Click Calculate: Press the "Calculate EVI" button to process the formula instantly in your browser.
- Review Results: Check the numerical value, the visual gauge, and the general interpretation classification.
What is EVI?
The Enhanced Vegetation Index (EVI) is an 'optimized' vegetation index designed to enhance the vegetation signal with improved sensitivity in high biomass regions and improved vegetation monitoring through a de-coupling of the canopy background signal and a reduction in atmosphere influences. It is widely used in remote sensing and earth observation to monitor vegetation health, canopy vigor, and biomass-related patterns.
Unlike NDVI, which can saturate in dense canopies, EVI incorporates the blue band to correct for aerosol scattering and applies canopy background adjustment factors.
EVI Formula
- G = 2.5 (Gain factor)
- C1 = 6 (Aerosol coefficient)
- C2 = 7.5 (Aerosol coefficient)
- L = 1 (Canopy background adjustment)
EVI Value Interpretation
Please note that these thresholds are a general guide. Actual interpretation depends heavily on the specific sensor, atmospheric corrections applied, and local land cover types.
| EVI Range | General Interpretation | Visual Indicator |
|---|---|---|
| < 0 | Water / Non-vegetated / Cloud / Snow / Bare Surface | Blue / Gray |
| 0 – 0.1 | Very Low Vegetation / Sparse | Yellow / Brown |
| 0.1 – 0.2 | Low Vegetation | Light Green |
| 0.2 – 0.4 | Moderate Vegetation / Shrubland | Green |
| 0.4 – 0.6 | High Vegetation / Healthy Canopy | Dark Green |
| > 0.6 | Very High Vegetation / Dense Forest / Crops | Deep Green |
Data Sources for EVI
EVI can be calculated from various multispectral sensors, provided they have appropriate Blue, Red, and Near-Infrared bands. Common sources include:
- Landsat (8/9): Uses Band 2 (Blue), Band 4 (Red), and Band 5 (NIR).
- Sentinel-2: Uses Band 2 (Blue), Band 4 (Red), and Band 8 or 8A (NIR).
- MODIS: Provides pre-calculated EVI products (MOD13Q1) globally.
- UAV Multispectral Imagery: Drones equipped with sensors like MicaSense RedEdge.
* Ensure your input data is Surface Reflectance (SR) scaled appropriately (usually 0 to 1) before calculating.