How to use the ndvi vegetation index calculator
Calculate the normalised difference vegetation index from near-infrared and red reflectance. Enter near-infrared reflectance, red reflectance in the fields above; the ndvi, vegetation interpretation are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “NDVI calculator”, “vegetation greenness index”, “satellite vegetation index”, “calculate ndvi vegetation index”, “find ndvi”.
Formula
Variables
- nir — Near-infrared reflectance
- red — Red reflectance
Worked example
With near-infrared reflectance = 0.5, red reflectance = 0.1, the calculator gives ndvi ≈ 0.6666667; vegetation interpretation ≈ Dense healthy vegetation text.
Frequently asked questions
What is the ndvi vegetation index calculator used for?
Calculate the normalised difference vegetation index from near-infrared and red reflectance. It helps with questions such as “NDVI calculator”, “vegetation greenness index”, “satellite vegetation index”.
What is the formula for the ndvi vegetation index calculation?
NDVI = (nir-red) / (nir+red). Vegetation interpretation (text) = [NDVI]>0.5?"Dense healthy vegetation":([NDVI]>0.2?"Moderate vegetation":"Sparse or no vegetation"). Here nir is near-infrared reflectance, red is red reflectance.
What inputs do I need for the ndvi vegetation index calculator?
You need near-infrared reflectance, red reflectance. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the ndvi vegetation index calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the ndvi vegetation index result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.