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Watts to dBm:

dBw = 10Log₁₀(Power Watts)

dBm = (10Log₁₀(Power Watts)) + 30

Insert Power in Watts: Watts.
= dBw.
= dBm.

dBw to Watts:

Watts = 10^(dBw/10)
MilliWatts = 10^{((dBw + 30)/10)}

Insert Power in dBw: dBw.

= Watts.
= MilliWatts.

dBm to Watts:

Watts = 10^{((dBm - 30)/10)}
MilliWatts = 10^(dBm/10)

Insert Power in dBm: dBm.

= Watts.
= MilliWatts.

Voltage Gain / Loss to dB:

dB_{(gain / loss)} = 20Log₁₀(Gain or Loss)

Insert Voltage Gain or Loss: Volts

= dB.

dBm to Volts / uVolts:

Volts = Log₁₀^-1[(dBm -13)/20]
uVolts = Log₁₀^-1[(dBm + 107)/20]

Insert Power in dBm: dBm

= Volts.

= uVolts.

dBw to Volts / uVolts:

Volts = Log₁₀^-1[(dBw - 17)/20]
uVolts = Log₁₀^-1[(dbw + 137)/20]

Insert Power in dBw: dBw

= Volts.

= uVolts.

Parabolic Antenna Tilt (Degrees):

Tilt_{(a -> b)} = 57.2957795[((h_b - h_a)/5280DistMi) - (DistMi/7920 K-Factor)]
Tilt_{(b -> a)} = 57.2957795[((h_a- h_b )/5280DistMi) - (DistMi/7920 K-Factor)]

Insert Height of Antenna A: Above Mean Sea Level (AMSL)
Insert Height of Antenna B: Above Mean Sea Level (AMSL)

Insert Distance in Miles: Miles

Insert K-Factor: (effective earth radius)

Tilt_{(a -> b)} = Degrees.

Tilt_{(b -> a)} = Degrees.

Parabolic 3-dB Beam width (Degrees):
Parabolic Antenna Gain (dB) - 55% efficiency:

Beam Width = 70 / Diameter in Feet * Frequency in GHz
Antenna Gain = 20Log₁₀(Distance in Feet) + 20Log₁₀(Frequency in GHz) + 7.5

Insert Antenna Diameter in Feet: Feet
Insert Antenna Frequency in GHz: GHz

Antenna Beam Width (3dB) = Degrees.

Antenna Gain (dB) = dB

Insert Frequency in MHz: MHz
Insert Distance in Miles: Miles

FSL(isotropic) = dB.
FSL(di-pole) = dB.

Fresnel Zone Clearance:

1^st Fresnel = 72.1 * SqrRoot(dist1_Mi * dist2_Mi / FreqGHz * Distance_Mi)
n^th Fresnel = 1^st Fresnel * SqrRoot(n)

Insert dist1_Mi : Miles
Insert dist2_Mi: Miles

Insert Frequency in GHz: GHz

Insert n (Less then 1 = 0.n * 1^st): n^th Fresnel zone.

n^th Fresnel Zone = Feet.

Inverse Position (Azimuth and Distance):

The equation is too long to add, sorry.

Latitude A:	Deg. Min. Sec.
Longitude A:	Deg. Min. Sec.
Latitude B:	Deg. Min. Sec.
Longitude B:	Deg. Min. Sec.

Azimuth From A to B: Deg.
Azimuth From B to A: Deg.

Distance From A to B: Miles.
Distance From A to B: Kilometers.

Power (Watts) to Voltage :

Voltage to Power (Watts):