Series Capacitor
Parallel Capacitor
Series Capacitance Formula
Parallel Capacitance Formula


This tool is used to decode information for color banded axial lead resistors. Select the number of bands, then their colors to determine the value and tolerance of the resistors.
This tool calculates the overall capacitance value for multiple capacitors connected either in series or in parallel.
The surface mount capacitor code calculator can determine the capacitance value and tolerance by inputting the 3/4 digit or alphabetical code found on the device.
Choose the code type, three-or-four-digit EIA or EIA-198, then select the markings from the table below.
Standard-tolerance SMD capacitors use a 3-digit code to mark the capacitance value on the part. The first two numbers will indicate the significant digits, and the third will be the multiplier. 'R' is used to indicate the position of a decimal point.
Similar to the three digit EIA, the four digit format uses the beginning values to indicate the significant digits, the last digit as the multiplier and a letter designating a tolerance. 'R' is used to indicate the position of a decimal point. The four digit format allows for higher precision.
The EIA-198 system of part marking uses two characters (one number and one letter) in which the letter represents the value and number represents the multiplier.
The surface mount resistor code calculator can be used to determine the resistance value of an SMD resistor using the markings found on the device. Choose the code format: three digit EIA, four digit EIA, or EIA-96. Then select the markings.
Standard-tolerance SMD resistors use a 3-digit code to mark the resistance value on the part. The first two numbers will indicate the significant digits, and the third will be the multiplier. 'R' is used to indicate the position of a decimal point.
Similar to the three digit EIA, the four digit format uses the beginning values to indicate the significant digits while the last digit is the multiplier. 'R' is used to indicate the position of a decimal point. The four digit format allows for higher precision.
The EIA96 system of part marking is based on the EIA96 series of standard resistor values and is typically used on 1% tolerance parts. It uses three characters (two numbers and a digit) in which the numbers represent the value (34 = 34th value of the possible range) and the letter represents the multiplier.
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Æ› (Lambda) = Wavelength in meters
c = Speed Of Light (299,792,458 meters/second)
f = Frequency in Hz
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The 555 timer is a commonly used integrated circuit that can be configured to produce a square waveform output. In Astable configuration the output will be a free running squarewave output. In Monostable mode the output will be a single high pulse generated for a single input event. This calculator will determine the pulse width of the output based on the resistance and capacitance values entered.