Impedance Calculators

• Air Core Solenoid Calculator
• Wire Inductance Calculator
• Strap Inductance Calculator
• Twisted Pair Impedance Calculator
• Toroid Inductance Calculator
• Air Core Flat Spiral Inductance Calculator
• Microstrip Impedance Calculator
• Embedded Microstrip Impedance Calculator
• Stripline Impedance Calculator
• Asymmetric Stripline Impedance Calculator
• Coplanar Stripline Impedance Calculator
• Differential Microstrip Impedance Calculator
• Differential Stripline Impedance Calculator
• Capacitively Loaded Transmission Line Calculator
• Pi and Tee Attenuator Pad Calculator
• 1:N Resistive Splitter Calculator
• Return Loss and VSWR Calculator
• Matching Network Calculator


(NOTE: Formulas with dimensions are shown in mm)

Air Core Solenoid Calculator:

Dimensional units: mm mils

d (diameter) =
len (length) =
N (number of turns) =
L (Inductance, nH) =

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Wire Inductance Calculator:

Dimensional units: mm mils

len (length) =
d (diameter) =
L (Inductance, nH) =

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Strap Inductance Calculator:

Dimensional units: mm mils

len (length) =
w (width) =
t (thickness) =
L (Inductance, nH) =

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Twisted Pair Impedance Calculator:

Dimensional units: mm mils

s (wire separation) =
d (wire diameter) =
er (relative dielectric constant) =
Zo (Impedance, Ohms) =
Tpd (Propagation Delay, ps/unit len) =

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Toroid Inductance Calculator:

Dimensional units: mm mils

len (Length) =
d1 (outer diameter) =
d2 (inner diameter) =
ur (relative permeability) =
N (number of turns) =
L (Inductance, nH) =

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Air Core Flat Spiral Inductance Calculator:

Dimensional units: mm mils

d1 (outer diameter) =
d2 (inner diameter) =
N (number of turns) =
L (Inductance, nH) =

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Microstrip Impedance Calculator:

Note: valid for (w/h) from 0.1 to 3.0
Dimensional units: mm mils

w (trace width) =
t (trace thickness) =
h (dielectric thickness) =
er (relative dielectric constant) =
Zo (Impedance, Ohms) =

Note: 1oz = 1.4mils = .03556mm

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Embedded Microstrip Impedance Calculator:

Note: valid for (h1/h) greater than 1.2
Dimensional units: mm mils

w (trace width) =
t (trace thickness) =
h (trace dielectric thickness) =
h1 (overall dielectric thickness) =
er (relative dielectric constant) =
Zo (Impedance, Ohms) =

Note: 1oz = 1.4mils = .03556mm

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Stripline Impedance Calculator:

Note: valid for (w/h) from 0.1 to 2.0 and (t/h) less than 0.25
Dimensional units: mm mils

w (trace width) =
t (trace thickness) =
h (dielectric thickness) =
er (relative dielectric constant) =
Zo (Impedance, Ohms) =

Note: 1oz = 1.4mils = .03556mm

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Asymmetric Stripline Impedance Calculator:

Note: valid for (w/h) from 0.1 to 2.0 and (t/h) less than 0.25
Dimensional units: mm mils

w (trace width) =
t (trace thickness) =
h (smaller dielectric thickness) =
h1 (larger dielectric thickness) =
er (relative dielectric constant) =
Zo (Impedance, Ohms) =

Note: 1oz = 1.4mils = .03556mm

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Coplanar Stripline Impedance Calculator:

Note: valid for (w/h) from 0.1 to 2.0 and (t/h) less than 0.25
Dimensional units: mm mils

w (trace width) =
t (trace thickness) =
h (outer dielectric thickness) =
h1 (center dielectric thickness) =
er (relative dielectric constant) =
Zo (Impedance, Ohms) =

Note: 1oz = 1.4mils = .03556mm

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Differential Microstrip Impedance Calculator:

Dimensional units: mm mils

Zo (single ended impedance, Ohms) =
d (trace separation) =
h (dielectric thickness) =
Zd (Impedance, Ohms) =

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Differential Stripline Impedance Calculator:

Dimensional units: mm mils

Zo (single ended impedance, Ohms) =
d (trace separation) =
h (dielectric thickness) =
Zd (Impedance, Ohms) =

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Capacitively Loaded Transmission Line Calculator:

Dimensional units: mm inch

Zo (unloaded trace impedance, Ohms) =
Tpd (unloaded propagation delay, ps/unit len) =
Cl (distributed capacitve load, pf) =
len (transmission line Length) =
Zl (loaded Impedance, Ohms) =

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Pi and Tee Attenuator Pad Calculator:

Port 1 Characteristic Impedance, Z1 (Ohms) =
Port 2 Characteristic Impedance, Z2 (Ohms) =
A (Attenuation, dB) =
Pi Attenuator Pad:
R1 ( Ohms) =
R2 ( Ohms) =
R3 ( Ohms) =
Tee Attenuator Pad:
R1 ( Ohms) =
R2 ( Ohms) =
R3 ( Ohms) =

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1:N Resistive Splitter Calculator:

Port Characteristic Impedance, Zo (Ohms) =
N (Number of split ports, 1:N) =
A (Attenuation, dB) =
Series Resistance - R1 ( Ohms) =
Shunt Resistance - R2 ( Ohms) =

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Return Loss and VSWR Calculator:

Port 1 Real Impedance, Z1_R (Ohms) =
Port 1 Imaginary Impedance, Z1_I (Ohms) =
Port 2 Real Impedance, Z2_R (Ohms) =
Port 2 Imaginary Impedance, Z2_I (Ohms) =
Reflection Coefficient (RL, Linear) =
Return Loss (RL, dB)=
Mismatch Loss (ML, dB)=
VSWR =

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Matching Network Calculator:

Port Z1 Real, Imaginary Impedance (Ohms) =	,	j
Port Z2 Real, Imaginary Impedance (Ohms) =	,	j
Operating Frequency, Fo (MHz) =
Lower, Higher Impedance Port	ZLOW=	ZHIGH=
Option 1:
Series, Shunt Matching Impedance (Ohms)	ja=	jb=
Option 2:
Series, Shunt Matching Impedance (Ohms)	ja=	jb=

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