Crop Evapotranspiration (ETc) Calculator

An advanced tool to calculate crop evapotranspiration (ETc) using scientific methods. Ideal for agronomists, farmers, and researchers to optimize water usage and improve crop yield.

Full original guide (expanded)

This calculator helps agronomists, farmers, and researchers estimate crop evapotranspiration (ETc) for efficient water usage and improved crop yield.

Calculate ETc

Results

ETc 0.00 mm/day

Source of Data and Methodology

All calculations are rigorously based on the formulas and data provided by the FAO. View source.

The Formula Explained

\( ET_c = ETo \times K_c \)

Glossary of Variables

  • ETc: Crop Evapotranspiration
  • ETo: Reference Evapotranspiration
  • Kc: Crop Coefficient

Example: Step-by-Step Calculation

For a corn crop with a reference evapotranspiration of 5 mm/day and a crop coefficient of 1.2, ETc is calculated as:

\( ET_c = 5 \times 1.2 = 6 \, \text{mm/day} \)

Frequently Asked Questions (FAQ)

What is crop evapotranspiration?

Crop evapotranspiration (ETc) is the amount of water that evaporates from soil and transpires from plants.

How is ETc calculated?

ETc is calculated using formulas that consider factors like temperature, humidity, and crop type.

Why is ETc important?

Understanding ETc helps optimize water usage and improve crop yield by ensuring crops receive the right amount of water.

Audit: Complete
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
\[','\]
','
Formula (extracted text)
\( ET_c = ETo \times K_c \)
Formula (extracted text)
\( ET_c = 5 \times 1.2 = 6 \, \text{mm/day} \)
Variables and units
  • No variables provided in audit spec.
Sources (authoritative):
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
  • Initial audit spec draft generated from HTML extraction (review required).
  • Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
  • Confirm sources are authoritative and relevant to the calculator methodology.
Verified by Ugo Candido on 2026-01-19
Profile · LinkedIn

This calculator helps agronomists, farmers, and researchers estimate crop evapotranspiration (ETc) for efficient water usage and improved crop yield.

Calculate ETc

Results

ETc 0.00 mm/day

Source of Data and Methodology

All calculations are rigorously based on the formulas and data provided by the FAO. View source.

The Formula Explained

\( ET_c = ETo \times K_c \)

Glossary of Variables

  • ETc: Crop Evapotranspiration
  • ETo: Reference Evapotranspiration
  • Kc: Crop Coefficient

Example: Step-by-Step Calculation

For a corn crop with a reference evapotranspiration of 5 mm/day and a crop coefficient of 1.2, ETc is calculated as:

\( ET_c = 5 \times 1.2 = 6 \, \text{mm/day} \)

Frequently Asked Questions (FAQ)

What is crop evapotranspiration?

Crop evapotranspiration (ETc) is the amount of water that evaporates from soil and transpires from plants.

How is ETc calculated?

ETc is calculated using formulas that consider factors like temperature, humidity, and crop type.

Why is ETc important?

Understanding ETc helps optimize water usage and improve crop yield by ensuring crops receive the right amount of water.

Audit: Complete
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
\[','\]
','
Formula (extracted text)
\( ET_c = ETo \times K_c \)
Formula (extracted text)
\( ET_c = 5 \times 1.2 = 6 \, \text{mm/day} \)
Variables and units
  • No variables provided in audit spec.
Sources (authoritative):
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
  • Initial audit spec draft generated from HTML extraction (review required).
  • Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
  • Confirm sources are authoritative and relevant to the calculator methodology.
Verified by Ugo Candido on 2026-01-19
Profile · LinkedIn

This calculator helps agronomists, farmers, and researchers estimate crop evapotranspiration (ETc) for efficient water usage and improved crop yield.

Calculate ETc

Results

ETc 0.00 mm/day

Source of Data and Methodology

All calculations are rigorously based on the formulas and data provided by the FAO. View source.

The Formula Explained

\( ET_c = ETo \times K_c \)

Glossary of Variables

  • ETc: Crop Evapotranspiration
  • ETo: Reference Evapotranspiration
  • Kc: Crop Coefficient

Example: Step-by-Step Calculation

For a corn crop with a reference evapotranspiration of 5 mm/day and a crop coefficient of 1.2, ETc is calculated as:

\( ET_c = 5 \times 1.2 = 6 \, \text{mm/day} \)

Frequently Asked Questions (FAQ)

What is crop evapotranspiration?

Crop evapotranspiration (ETc) is the amount of water that evaporates from soil and transpires from plants.

How is ETc calculated?

ETc is calculated using formulas that consider factors like temperature, humidity, and crop type.

Why is ETc important?

Understanding ETc helps optimize water usage and improve crop yield by ensuring crops receive the right amount of water.

Audit: Complete
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
\[','\]
','
Formula (extracted text)
\( ET_c = ETo \times K_c \)
Formula (extracted text)
\( ET_c = 5 \times 1.2 = 6 \, \text{mm/day} \)
Variables and units
  • No variables provided in audit spec.
Sources (authoritative):
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
  • Initial audit spec draft generated from HTML extraction (review required).
  • Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
  • Confirm sources are authoritative and relevant to the calculator methodology.
Verified by Ugo Candido on 2026-01-19
Profile · LinkedIn
Formulas

(Formulas preserved from original page content, if present.)

Version 0.1.0-draft
Citations

Add authoritative sources relevant to this calculator (standards bodies, manuals, official docs).

Changelog
  • 0.1.0-draft — 2026-01-19: Initial draft (review required).