Finding True North in Dallas: Magnetic Declination Explained

Navigating with a compass in Dallas requires adjusting for magnetic declination—the angle between magnetic north (where your compass points) and true north (geographic North Pole). Here's the straightforward answer for Dallas, Texas.

The Rule for Dallas

Add the easterly declination to your magnetic bearing.

As of 2024, Dallas's magnetic declination is approximately 3° 30' East (roughly 3.5°). This means magnetic north sits about 3.5° east of true north.

Practical Application

• Compass reads 0° (magnetic north) → True north = 0° + 3.5° = 3.5°
• You want to travel true north (0°) → Set compass to 360° - 3.5° = 356.5°
• General formula: True Bearing = Magnetic Bearing + Declination (East is positive)

Why "Add for East"?

Mnemonic: "East is Least, West is Best" refers to subtracting easterly declination when converting true to magnetic. But you're doing the reverse: magnetic → true. So for easterly declination, you add.

Important Caveats

• Declination changes ~5–7 arcminutes per year in Dallas (shifting westward)
• Local anomalies (rebar, power lines, vehicles) can deflect your compass 5–10°
• Check current values at NOAA's Magnetic Declination Calculator before critical navigation
• GPS units handle this automatically if calibrated

For casual hiking around Dallas-Fort Worth, 3–4° adjustment suffices. For survey work or long-distance backcountry travel, use the current precise value.