Heading & Course Converter
Convert between true, magnetic, and compass headings using magnetic variation and compass deviation. The TVMDC chain made easy.
Inputs
°
°
US: −20°W (Pacific NW) to +15°E (New England)
°
Typically ±2° to ±5°
Results
True Course / Heading
90°
Magnetic Heading
80°
Compass Heading
78°
Reciprocal (True)270°
Variation10°E
Deviation2°E
True Course / Heading
90°
Magnetic Heading
80°
Compass Heading
78°
How to Use This Calculator
- Select conversion direction: True→Compass or Compass→True.
- Enter the starting heading value.
- Enter magnetic variation from sectional chart isogonic lines (East = positive, West = negative).
- Enter compass deviation from the correction card in your aircraft.
- Remember: TVMDC — True Virgins Make Dull Companions.
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