## Magnetic Declination Calculator :

Enter the Magnetic declination calculator its Latitude in °N, Longitude in °W, Elevation in kilometers(km), and get the calculation below the calculator check it.

## Magnetic Declination Formula :

**From the Declination Calculator**: The declination calculator is a simple tool for determining the declination of any location on the globe. The calculator calculates the declination using magnetic reference field models by entering the year, degree, and longitude of a specific region.**From the Declination Chart**: A magnetic declination chart is a tool for calculating declination. The magnetic fields of the world are depicted on the chart. Finding magnetic declination is made simple using this method.**From the Compass**: True, magnetic, and compass bearings are the three types of bearing available.

T = M + V

M = C + D

T = C + V + D (which is a general equation relating compass and true bearings)

Where,

C →Compass Bearing

M → Magnetic Bearing

T → True Bearing

V→ Variation

D →Compass Deviation

## Sample Sums :

### Sum1 :

Where the horizontal and vertical components of the earth’s magnetic field are identical, what is the angle of dip?

### Solution :

Angle of dip is,

δ = tan^{-1}(B_{V}/B_{H})

Here,

BV = The magnetic field’s vertical components,

BH = The magnetic field’s horizontal components.

Therefore, BV = BH

δ = tan^{-1}(1)

= 45^{o}.

### Sum2 :

The North point of a magnetic needle free to rotate in a vertical plane parallel to the magnetic meridian has a 60° angle to the horizontal. The earth’s magnetic field has a horizontal component of 1.2 G at this location. Calculate the magnitude of the earth’s magnetic field at your location.

### Solution :

Given: δ = 60^{o}, H = 1.2 G

Since,

B_{e} = H / cos δ

B_{e} = 1.2 / cos 60

= 1.2 / (0.5)

= 2.4 G.