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 ÷ (C1 + C2 + Cn~ . . .)
Capacitance (Series) in farads = 1 ÷ ((1 ÷ C1) + (1 ÷ C2) + (1 ÷ Cn~) . . .)
Celsius Degrees (Co) = (5 ÷ 9) × (Farenheit Degrees − 32)
Fahrenheit Degrees (Fo) = ((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 ÷ L1) + (1 ÷ L2) + (1 ÷ Ln~) . . .)Inductance (Series) in Henry's = L1 + L2 + Ln~ . . .
Inductive Reactance (XL) = 2 × π × Resonant Frequency × Inductance
Kilowatts(kW) = Watts (W) × .001
LED Required Resistor Value (Ohms) = (Voltsavailable - VoltsLED maximum) ÷ MilliAmpsLED maximum
Miles = Kilometers × .6214
Pi (π) = 3.1415926535 *to 10 decimal places
Power (Watts) = Amps × Volts
Power (Watts) = Amps2 × Resistance (Ohms)
Pounds (lbs) = Ounces × .0625
Reactance (Capacitive) (XC) = 1 ÷ (2 × π × RESONANT_FREQUENCY × CAPACITANCE)
Reactance (Inductive) (XL) = 2 × π × RESONANT_FREQUENCY × INDUCTANCE
Resistance (Parallel) in Ohms = 1 ÷ ((1 ÷ R1) + (1 ÷ R2) + (1 ÷ Rn~) . . .)
Resistance (Series) in Ohms = R1 + R2 + Rn~ . . .
Resonant Frequency (f) = 1 ÷ ((2 × π) × SQUARE_ROOT(INDUCTANCE × CAPACITANCE))
Volume of a Sphere = (4 ÷ 3) × π × radius2
Volume of a Cylinder = π2 × radius × height
Volume of a Cone = (π × radius2 × height) ÷ 3
Watts (W) = Volts ÷ Amps