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: IPCD317A:
Formula: 
Applicability:

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): 
PCB Impedance and Capacitance Calculator: Asymmetric Differential Stripline
Formula: 
Applicability:

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): 
PCB Impedance and Capacitance Calculator: Microstrip Trace Impedance
Based on Zo Equation Per: IPCD317A:
Formula: 
Applicability:

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): 
PCB Impedance and Capacitance Calculator: Stripline
Based on Zo Equation Per: IPCD317A:
Formula: 
Applicability:

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): 
Bolt Torque
Bolt installation preload calculator is based on MILHDBK60, 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: 
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.
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