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Magnetic Declination is the horizontal angle between true north and magnetic north at the time of observation. Check FAQs
MD=MB-TB
MD - Magnetic Declination?MB - Magnetic Bearing?TB - True Bearing?

Magnetic Declination to West Example

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With units
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Here is how the Magnetic Declination to West equation looks like with Values.

Here is how the Magnetic Declination to West equation looks like with Units.

Here is how the Magnetic Declination to West equation looks like.

-5Edit=55Edit-60Edit
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HomeIcon Home » Category Engineering » Category Civil » Category Surveying Formulas » fx Magnetic Declination to West

Magnetic Declination to West Solution

Follow our step by step solution on how to calculate Magnetic Declination to West?

FIRST Step Consider the formula
MD=MB-TB
Next Step Substitute values of Variables
∴ MD=55°-60°
Next Step Convert Units
∴ MD=0.9599rad-1.0472rad
Next Step Prepare to Evaluate
∴ MD=0.9599-1.0472
Next Step Evaluate
∴MD=-0.0872664625996991rad
Next Step Convert to Output's Unit
∴MD=-4.99999999999994°
LAST Step Rounding Answer
∴MD=-5°

Magnetic Declination to West Formula Elements

Variables
Magnetic Declination
Magnetic Declination is the horizontal angle between true north and magnetic north at the time of observation.
Symbol: MD
Measurement: AngleUnit: °
Note: Value can be positive or negative.
Formulas to find Magnetic DeclinationOpen Variable
Magnetic Bearing
Magnetic Bearing is the horizontal angle which a line makes with the magnetic meridian is called magnetic bearing. It varies with time.
Symbol: MB
Measurement: AngleUnit: °
Note: Value should be greater than 0.
Formulas to find Magnetic BearingOpen Variable
True Bearing
True Bearing is the horizontal angle measured clockwise between the true meridian and the line is called true bearing of the line.
Symbol: TB
Measurement: AngleUnit: °
Note: Value should be greater than 0.
Formulas to find True BearingOpen Variable

Other Formulas to find Magnetic Declination

​Go Magnetic Declination to East
MD=TB-MB

Other formulas in Compass Surveying category

​Go Fore Bearing in Whole Circle Bearing System
FB=(BB-(180⋅π180))
​Go Included Angle from Two Lines
θ=α-β
​Go Included Angle when Bearings are Measured in Opposite Side of Common Meridian
θ,=β+α
​Go Included Angle when Bearings are Measured in Same Side of Different Meridian
θ=(180⋅π180)-(α+β)

How to Evaluate Magnetic Declination to West?

Magnetic Declination to West evaluator uses Magnetic Declination = Magnetic Bearing-True Bearing to evaluate the Magnetic Declination, The Magnetic Declination to West formula is defined as the angle between the geographic north (true north) and the magnetic north, where the magnetic north lies to the west of the true north. This angle varies depending on the geographic location and changes over time due to variations in the Earth's magnetic field. Magnetic Declination is denoted by MD symbol.

How to evaluate Magnetic Declination to West using this online evaluator? To use this online evaluator for Magnetic Declination to West, enter Magnetic Bearing (MB) & True Bearing (TB) and hit the calculate button.

FAQs on Magnetic Declination to West

What is the formula to find Magnetic Declination to West?
The formula of Magnetic Declination to West is expressed as Magnetic Declination = Magnetic Bearing-True Bearing. Here is an example- -286.478898 = 0.959931088596701-1.0471975511964.
How to calculate Magnetic Declination to West?
With Magnetic Bearing (MB) & True Bearing (TB) we can find Magnetic Declination to West using the formula - Magnetic Declination = Magnetic Bearing-True Bearing.
What are the other ways to Calculate Magnetic Declination?
Here are the different ways to Calculate Magnetic Declination-
  • Magnetic Declination=True Bearing-Magnetic BearingOpenImg
Can the Magnetic Declination to West be negative?
Yes, the Magnetic Declination to West, measured in Angle can be negative.
Which unit is used to measure Magnetic Declination to West?
Magnetic Declination to West is usually measured using the Degree[°] for Angle. Radian[°], Minute[°], Second[°] are the few other units in which Magnetic Declination to West can be measured.
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