NDVI Index Calculator
Calculate NDVI using Near Infrared (NIR) and Red reflectance values to evaluate crop health.
Inputs
How It Works
NDVI = (NIR − Red) ÷ (NIR + Red)
Healthy plants reflect more NIR light and absorb more red light, resulting in higher NDVI values.
FAQ
What is NDVI?
NDVI (Normalized Difference Vegetation Index) measures vegetation health using spectral reflectance data.
Where does NIR data come from?
NIR values typically come from drone imagery, satellite imagery, or crop sensors.
Can NDVI detect stress?
Yes. Low NDVI values often indicate nutrient deficiency, drought stress, or disease.
About NDVI
NDVI (Normalized Difference Vegetation Index) is one of the most widely used remote sensing tools in agriculture. It measures crop vigor by comparing how plants reflect near infrared light and absorb red light during photosynthesis.
Healthy crops reflect a large amount of NIR and absorb red light efficiently, resulting in higher NDVI values. Lower NDVI values may indicate plant stress, nutrient deficiencies, poor stand establishment, or environmental stress conditions.
Farmers and agronomists use NDVI imagery to guide scouting decisions, identify management zones, optimize fertilizer prescriptions, and improve yield outcomes.