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Antenna Length (quarter-wavelength) in feet = 234 ÷ Frequency in Megahertz (MHz)

Antenna Length (half-wavelength) in feet = 468 ÷ Frequency in Megahertz (MHz)

Antenna Length (full-wavelength) in feet = 936 ÷ Frequency in Megahertz (MHz)

Area of a Circle = π × radius ^{2}

Area of a Square = Length of any side ^{2}

Area of a Triangle = (1 ÷ 2) × (Base-to-Tip-Length ÷ Base Width)

Acres = Square Miles × .640

Acres = Square Feet × 2.2957 × 10^{--5}

Capacitance (Parallel) in farads = 1 ÷ (C_{1} + C_{2} + C_{n~} . . .)

Capacitance (Series) in farads = 1 ÷ ((1 ÷ C_{1}) + (1 ÷ C_{2})
+ (1 ÷ C_{n~}) . . .)

Celsius Degrees (C^{o}) = (5 ÷ 9) × (Farenheit Degrees − 32)

Fahrenheit Degrees (F^{o}) = ((9 ÷ 5) × Celsius Degrees) + 32

Feet (ft) = Meters × 3.281

Feet (ft) = Fathoms × 6

Feet (ft) = Yards × 3

Gallons (gal) = Liters × .2642

Gallons (gal) = Barrels of oil × 42

Horsepower (HP) = BTU per minute × .0236

Horsepower (HP) = Kilowatts (kW) × 1.341

Horsepower (HP) = Watts (W) × .0013

Inches (in) = Centimeter (cm) × .3937

Inches (in) = Yards × 36

Inductance (Parallel) in Henry's = 1 ÷ ((1 ÷ L
Inductance (Series) in Henry's = L_{1} + L_{2} + L_{n~} . . .

Inductive Reactance (X_{L}) = 2 × π × Resonant Frequency × Inductance

Kilowatts(kW) = Watts (W) × .001

LED Required Resistor Value (Ohms) = (Volts_{available} -
Volts_{LED maximum}) ÷ MilliAmps_{LED maximum}

Miles = Kilometers × .6214

Pi (π) = 3.1415926535 *to 10 decimal places

Power (Watts) = Amps × Volts

Power (Watts) = Amps^{2} × Resistance (Ohms)

Pounds (lbs) = Ounces × .0625

Reactance (Capacitive) (X_{C}) = 1 ÷ (2 × π × RESONANT_FREQUENCY × CAPACITANCE)

Reactance (Inductive) (X_{L}) = 2 × π × RESONANT_FREQUENCY × INDUCTANCE

Resistance (Parallel) in Ohms = 1 ÷ ((1 ÷ R_{1}) + (1 ÷ R_{2})
+ (1 ÷ R_{n~}) . . .)

Resistance (Series) in Ohms = R_{1} + R_{2} + R_{n~} . . .

Resonant Frequency (f) = 1 ÷ ((2 × π) × SQUARE_ROOT(INDUCTANCE × CAPACITANCE))

Volume of a Sphere = (4 ÷ 3) × π × radius^{2}

Volume of a Cylinder = π^{2} × radius × height

Volume of a Cone = (π × radius^{2} × height) ÷ 3

Watts (W) = Volts ÷ Amps