Formula given below is as per EPA FCC OET Bulletin NO 65. S = Power Density P = Power Input to Antenna G = Power Gain of Antenna R = Distance to center of Radiation of Antenna Enter value and click on calculate. Result will be displayed. Enter your values: Power Input to Antenna (P):

## Convert Units of Mass, Length, and Area

This simple conversion calculator converts various units of mass, length and area. <tdalign=”center”> Enter Value: Result: <tdalign=”center”>

## Reactance Calculators

Enter value and click on calculate. Result will be displayed. Calculate Capacitance and Inductance from Reactance Enter your values: Frequency: Hz Reactance: ohms Output: Inductance: mH Capacitance: µf Inductive Reactance Calculator Enter your values: Frequency: Hz Inductance: mH Output: Inductive Reactance XL: Ohms Capacitive Reactance Calculator Enter your values: Frequency: Hz

## Sallen-Key Butterworth High Pass Filter Calculator

Ra = Filter Resistor Rb = Filter Resistor (Ra = Rb) Ca = Filter Capacitor Cb = Filter Capacitor (Ca = Cb) Enter value and click on calculate. Result will be displayed. Enter your values: Cutoff Frequency: Hz KHz MHz Output: (Enter any one value – Ra or Rb or Capacitor) Resistor Ra: ohm Kohm

## Speed – Distance – Time Calculator

Enter value and selectunit. Then click on calculate and result will be displayed. Calculate Time from Distance and Speed Enter Your Values & select unit: Distance: Metres Millimetres Centimetres Kilometres Inches Feet Yards Fathoms Statute Miles Nautical Miles Light Second Light Minute Light Hour Light Year ParSec Astronomical Unit Speed: Metres per Second Metres per

## Efficiency Bandwidth Product Calculators

Enter value, select unit and click on calculate. Result will be displayed. Calculate Efficiency Bandwidth Product (EBP) EBP = Efficiency Bandwidth Product F = Speaker Resonance Frequency Q = Speaker Electrical Enter your values: Speaker Resonance Frequency: Hertz1 / SecondCycle / SecondRotation / Second Speaker Electrical : Output: Efficiency Bandwidth Product: Calculate Speaker

## Equal Component Butterworth High Pass Filter Calculator

Ra = Filter Resistor Rb = Filter Resistor (Ra = Rb) Ca = Filter Capacitor Cb = Filter Capacitor (Ca = Cb) Rc = Feedback Resistor Rd = Feedback Resistor Enter value of Cutoff Frequency, any one value – Resistor or Capacitor, any one value – Resistor Rc or Resistor Rd and click on calculate.

## Subwoofer Vent Minimum Port Diameter Calculators

R a = Filter Resistor R b = Filter Resistor (R a = R b) C a = Filter Capacitor C b = Filter Capacitor (C a = C b) R c = Feedback Resistor R d = Feedback Resistor Enter value of Cutoff Frequency, any one value – Resistor or Capacitor, any one value

## Non-Inverting Operational Amplifier Resistor Calculator

Enter value and click on calculate. Result will be displayed. Enter your values: Vout: Volts Gain: Volts Rg: K Ohms V1: Volts V2: Volts Vp: Volts Vn: Volts Output: Rf K Ohms Ra: K Ohms Rb: V

## Tee Attenuator Calculator

Enter value and click on calculate. Result will be displayed. Enter your values: Attenuation (A): dB Input Impedance (Zi): ohm Kohm Mohm Output Impedance (Zo): ohm Kohm Mohm Output: Ra: ohm Kohm Mohm Rb: ohm Kohm Mohm Rb: ohm Kohm Mohm

## Calculate Inductance of Electrode or Straight Wire

Enter value and click on calculate. Result will be displayed. Enter your values: Length of Wire: Inches Diameter of Wire: Inches Output: Inductance: uH

## Convert Units of Pressure

Enter value and select a conversion from the buttons below and result will be displayed. Enter Value: Result:

## Line Of Sight Calculator

Enter value, select unit and click on calculate. Result will be displayed. Enter your values: Antenna Height (1st Station): Antenna Height (2nd Station): Units: Feet Metres Output: Radio Horizon (1st Station): Radio Horizon (2nd Station): Total Line Of Sight: Units: Miles Kilometres

## Subwoofer Vent Length Calculators

Enter value, select unit and click on calculate. Result will be displayed. Calculate Length of Vent or Port L = Length of Vent or Port D = Diameter of Vent N = Number of Ports V = Volume of Box F = Tuning Frequency K = End Correction Factor Enter your values: Output:

## Frequency and Wavelength Calculator

F= Frequency C= Speed Of Light = Wavelength Enter value and click on calculate. Result will be displayed. Enter your value: Calculate in : Output:

## Sallen-Key Butterworth Low Pass Filter Calculator

Ra = Filter Resistor Rb = Filter Resistor (Ra = Rb) Ca = Filter Capacitor Cb = Filter Capacitor (Ca = Cb) Enter value and click on calculate. Result will be displayed. Enter your values: Cutoff Frequency: Hz KHz MHz Output: (Enter any one value – Resistor or Ca or Cb) Resistor (Ra = Rb):

## RMS Calculator

Enter value, select unit and click on calculate. Result will be displayed. Enter your values: Enter V1 or I1: Enter V2 or I2: Enter the duty cycle, D: (where D is between 0 and 1) Output: (a) Pulse Waveform: RMS: DC: AC: (b) Triangle Waveform: RMS: DC:

## Ohm’s Law Calculator

Enter value and select a conversion from the buttons below and result will be displayed. Calculate Watts w/ Ohm’s Law: Enter any two of: E, I, and R E: I: R: Output: Watts: Calculate Amps w/ Ohm’s Law: Enter any two of: E, W, and R E: W: R: 3-Phase Output: Amperes: Calculate

## Laser Real-Time Unit Converter

Enter value and select unit. Then click on calculate and result will be displayed in different units. Enter your values: Input Unit: Microns Inches Millimeters Nanometers Microinches Angstroms Mils Output: Microns: Inches: Millimeters: Nanometers: Microinches: Angstroms: Mils:

## Skin Effect Calculator

Enter value and select unit. Result will be displayed. Enter your values: Frequency: HzKHzMHzGHz Output: Skin Depth: cmmmuminchesmilsoz/ft^2

## HF Filter Calculator

F= Frequency C= Speed Of Light = Wavelength Enter value and click on calculate. Result will be displayed. Enter your value: Calculate in : Output:

## Butterworth Tee LC Low Pass Filter Calculator

Enter value, select unit and click on calculate. Result will be displayed. Enter your values: Cutoff Frequency: Hz KHz MHz GHz Impedance Z0: ohm Kohm Mohm Number of Components: (1-11) Output: Inductance: Select Unit nH µH mH H L1: L2: L3: L4: L5:

## Maximum Flux Density Calculator

Enter value and click on calculate. Result will be displayed. Enter your values: AC Parameters RMS Voltage: Vrms Frequency: MHz Number of Turns: Cross Section of Core: cm2 DC Parameters DC Current: Amperes Specific To Core Used: mH/Turns2 Output: Maximum Flux Density: Gauss Maximum Flux Density: Tesla

## Pinhole Sizing Calculator

Enter value and select unit. Then click on calculate and result will be displayed. Enter your values: Depth of Camera: (from pinhole to film) Inches cm mm Aperture Diameter:(Leave value at 0 to use optimum) mm Metered Aperture: Inches Metered Exposure Time: / Output: Image Diameter: Optimum Pinhole

## Friis Path Loss Calculator

Enter value (enter value of frequency or wavelength) and click on calculate. Result will be displayed. Enter your values: Ptx: dB Wavelength: m Or Frequency: MHz Distance: m Gtx: dB Grx: dB Output: Prx: