Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Vegetation Index Calculator

Calculate the Normalized Difference Vegetation Index (NDVI) from near-infrared and red reflectance values. Used in remote sensing and ecology to assess plant health, biomass, and land cover change.

Near-Infrared Reflectance

Red Reflectance

Fill in the required fields to see your result.

Geography

Heat Index Climate Calculator

Calculate the apparent 'feels like' temperature by combining air temperature, humidity, and wind speed. Useful for athletes, event organisers, and public health officials assessing outdoor heat risk.

Air Temperature (°C)

Relative Humidity (%)

Temperature Unit

Wind Speed (km/h)

Fill in the required fields to see your result.

Key differences

	Vegetation Index Calculator	Heat Index Climate Calculator
Category	Geography	Geography
Inputs required	2	4
Result	NDVI	Apparent Temperature (°)
What it does	Calculate the Normalized Difference Vegetation Index (NDVI) from near-infrared and red reflectance values. Used in remote sensing and ecology to assess plant health, biomass, and land cover change.	Calculate the apparent 'feels like' temperature by combining air temperature, humidity, and wind speed. Useful for athletes, event organisers, and public health officials assessing outdoor heat risk.