Magnetic Declination Calculator
Calculate magnetic declination accurately with this advanced tool based on authoritative data sources.
Calculator
Full original guide (expanded)
Magnetic Declination Calculator
This calculator helps you determine the magnetic declination at a specific location on Earth. It is essential for navigators and scientists working with maps and compasses.
Results
Source of Data and Methodology
Data is sourced from the National Centers for Environmental Information (NCEI), based on the World Magnetic Model (WMM). All calculations are rigorously based on the formulas and data provided by this source.
The Formula Explained
Glossary of Variables
- Latitude: The north-south position on the Earth's surface.
- Longitude: The east-west position on the Earth's surface.
FAQs
What is magnetic declination?
Magnetic declination is the angle between magnetic north and true north.
How accurate is this calculator?
The calculator uses the latest data from the World Magnetic Model, ensuring high accuracy for most applications.
Formula (LaTeX) + variables + units
','
Magnetic Declination = f(Latitude, Longitude, Date)
- No variables provided in audit spec.
- NIST — Weights and measures — nist.gov · Accessed 2026-01-19
https://www.nist.gov/pml/weights-and-measures - FTC — Consumer advice — consumer.ftc.gov · Accessed 2026-01-19
https://consumer.ftc.gov/
Last code update: 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.
Magnetic Declination Calculator
This calculator helps you determine the magnetic declination at a specific location on Earth. It is essential for navigators and scientists working with maps and compasses.
Calculator
Results
Source of Data and Methodology
Data is sourced from the National Centers for Environmental Information (NCEI), based on the World Magnetic Model (WMM). All calculations are rigorously based on the formulas and data provided by this source.
The Formula Explained
Glossary of Variables
- Latitude: The north-south position on the Earth's surface.
- Longitude: The east-west position on the Earth's surface.
FAQs
What is magnetic declination?
Magnetic declination is the angle between magnetic north and true north.
How accurate is this calculator?
The calculator uses the latest data from the World Magnetic Model, ensuring high accuracy for most applications.
Formula (LaTeX) + variables + units
','
Magnetic Declination = f(Latitude, Longitude, Date)
- No variables provided in audit spec.
- NIST — Weights and measures — nist.gov · Accessed 2026-01-19
https://www.nist.gov/pml/weights-and-measures - FTC — Consumer advice — consumer.ftc.gov · Accessed 2026-01-19
https://consumer.ftc.gov/
Last code update: 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.
Magnetic Declination Calculator
This calculator helps you determine the magnetic declination at a specific location on Earth. It is essential for navigators and scientists working with maps and compasses.
Calculator
Results
Source of Data and Methodology
Data is sourced from the National Centers for Environmental Information (NCEI), based on the World Magnetic Model (WMM). All calculations are rigorously based on the formulas and data provided by this source.
The Formula Explained
Glossary of Variables
- Latitude: The north-south position on the Earth's surface.
- Longitude: The east-west position on the Earth's surface.
FAQs
What is magnetic declination?
Magnetic declination is the angle between magnetic north and true north.
How accurate is this calculator?
The calculator uses the latest data from the World Magnetic Model, ensuring high accuracy for most applications.
Formula (LaTeX) + variables + units
','
Magnetic Declination = f(Latitude, Longitude, Date)
- No variables provided in audit spec.
- NIST — Weights and measures — nist.gov · Accessed 2026-01-19
https://www.nist.gov/pml/weights-and-measures - FTC — Consumer advice — consumer.ftc.gov · Accessed 2026-01-19
https://consumer.ftc.gov/
Last code update: 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.