Resources

Calculators

All calculators are approximations for general purpose use only and are not to be used for high degree of accuracy purposes. Please see Disclaimer below.

PCB Impedance and Capacitance Calculator: Asymmetric Stripline

Based on Zo Equation Per: IPC-D-317A:

Formula:
Impedance - Asymmetric Stripline
Applicability:
  • 1 ≤ εr ≤ 15
  • h1  ≤ h2
  • t ÷ h1  ≤ 0.99
  • 0.1  ≤ w ÷ h1 ≤ 2.0
  • Argument of natural logarithm ≥ 1.0
  • h1, h2, w, t > 0
Impedance - Asymmetric Stripline Model

US units     metric units

w Width of trace (mil):  
h1   Shorter width of dielectric (mil):  
h2  Larger width of dielectric (mil):  
t Trace thickness (mil):  
εr  Relative permittivity of dieletric:  
Accuracy (decimal points):

Z0  Differential impedance (Ω):  

(TOP)

PCB Impedance and Capacitance Calculator: Asymmetric Differential Stripline

Formula:
Impedance - Asymmetric Differential Stripline
Applicability:
  • w ÷ t ≤ 0.5
  • w, t, s, h > 0
Impedance - Symmetric Differential Stripline Model

US units     metric units

w Width of trace (mil):  
s Spacing between traces (mil):  
h Spacing between planes (mil):  
t Trace thickness (mil):  
εr  Relative permittivity of dieletric:  
Accuracy (decimal points):

Z0  Differential impedance (Ω):  

(TOP)

PCB Impedance and Capacitance Calculator: Microstrip Trace Impedance

Based on Zo Equation Per: IPC-D-317A:

Formula:
Impedance - Microstrip
Applicability:
  • 1 ≤ εr ≤ 15
  • w, t, h > 0
Impedance - Microstrip Model

US units    metric units

w Width of trace (mil):  
h Dielectric thickness (mil):  
t Trace thickness (mil):  
εr  Relative permittivity of dieletric:  
Accuracy (decimal points):

Z0 Characteristic impedance (Ω):  

(TOP)

PCB Impedance and Capacitance Calculator: Stripline

Based on Zo Equation Per: IPC-D-317A:

Formula:
Impedance - Symmetrical Stripline
Applicability:
  • 1 ≤ εr ≤ 15
  • 0.1 ≤ w ÷ h ≤ 3.0
  • Argument of natural logarithm ≥ 0.1
  • t ÷ h ≤ 0.99
  • w, t, h > 0
Impedance - Stripline Model

US units     metric units

w Width of trace (mil):  
h Dielectric thickness (mil):  
t Trace thickness (mil):  
εr  Relative permittivity of dieletric:  
Accuracy (decimal points):

Z0  Characteristic impedance (Ω):  

(TOP)

Bolt Torque

Bolt installation preload calculator is based on MIL-HDBK-60, 1990, Section 100.5.1, p. 26, Equation 100.5.1.

Formula:
Pi=T/(KD)

US units     metric units

T Bolt install torque (mil):
K Torque coefficient:
D Bolt nominal shank diameter (mil):
Accuracy (decimal points):

Pi  Bolt Preload:  

(TOP)

General - Conversion Calculators

One of the best conversion calculators that we have used is available for free. To checkout and download, click here: Conversion Calculator.

Disclaimer: The information on this webpage is developed and provided by Core Source Technologies for general purpose use only. While every effort is made to provide timely, correct and accurate information; no warranty of any kind is expressed or implied related to the accuracy, reliability, and availability of information, product, and services available on this website. In no event will we be liable for any loss of data or damages of any kind as a result of use or connection with this website. Any and all use including any reliance on this site is done so at your own risk.

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