Calculators

# Choose a calculator to tune your PCB design

### Trace Width Calculator Inputs:

 Current Amps Thickness oz/ft^2 mil mm um Feilds are auto updating

Optional Inputs:

 Temperature Rise Deg C F Ambient Temperature Deg C F Track Length inch feet mil mm um cm m

Results for Internal layers:

 Req. Track width mil mm um Resistance Ohm Voltage Drop Volts Power Loss Watts

Results for External Layers in Air:

 Req. track width mil mm um Resistance Ohm Voltage Drop Volts Power Loss Watts

Calculator are based on a curve fit to IPC-2221 (formerly IPC-D-275).

### Microstrip Impedance 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) = Note: 1oz = 1.4mils = 0.03556mm

### Stripline Impedance 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) = Note: 1oz = 1.4mils = 0.03556mm

### Embedded Microstrip Impedance 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) = Note: 1oz = 1.4mils = 0.03556mm 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) = Note: 1oz = 1.4mils = 0.03556mm

### Asymmetric Stripline Impedance 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) = Note: 1oz = 1.4mils = 0.03556mm

### Differential Microstrip Impedance Note: valid for (w/h) from 0.1 to 3.0

Dimensional units: mm mils
 w (trace width) = d (trace separation) = t (trace thickness) = h (dielectric thickness) = er (relative dielectric constant) = Zd (Differential Impedance, Ohms) =
Note: 1oz = 1.4mils = 0.03556mm

### Differential Microstrip Impedance From Zo Dimensional units: mm mils
 Zo (single ended impedance, Ohms) = d (trace separation) = h (dielectric thickness) = Zd (Impedance, Ohms) =

### Differential Stripline Impedance 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) = d (trace separation) = t (trace thickness) = h (dielectric thickness) = er (relative dielectric constant) = Zd (Impedance, Ohms) =
Note: 1oz = 1.4mils = 0.03556mm

### Differential Stripline Impedance From Zo Dimensional units: mm mils
 Zo (single ended impedance, Ohms) = d (trace separation) = h (dielectric thickness) = Zd (Impedance, Ohms) =

### Plane Impedance Dimensional units: mm mil
 w (width) = h (height) = ur (relative magnetic permeability) = er (relative dielectric constant) = L (inductance, nH) = C (capacitance, pF) = 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) = ### Wire Inductance Dimensional units: mm mils
 len (length) = d (diameter) = L (Inductance, nH) =

### Strap Inductance 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) = d (trace separation) = t (trace thickness) = h (dielectric thickness) = er (relative dielectric constant) = Zd (Impedance, Ohms) =
Note: 1oz = 1.4mils = 0.03556mm

### Air Core Solenoid Dimensional units: mm mils
 d (diameter) = len (length) = N (number of turns) = L (Inductance, nH) =

### Air Core Flat Spiral Inductance Dimensional units: mm mils
 d1 (outer diameter) = d2 (inner diameter) = N (number of turns) = L (Inductance, nH) =

### Toroid Inductance Dimensional units: mm mils
 len (Length) = d1 (outer diameter) = d2 (inner diameter) = ur (relative permeability) = N (number of turns) = L (Inductance, nH) =

### Mutual and Leakage Inductance L1 (Inductance, uH) = L2 (Inductance, uH) = L1_leak (Inductance, uH)) = L2_leak (Inductance, uH) =
Note: Calculations assume zero coil resistance

### Twisted Pair Impedance Dimensional units: mm mils
 s (wire separation) = d (wire diameter) = er (relative dielectric constant) = ### Coaxial Line Impedance Dimensional units: mm mil
 di (inner diameter) = do (outer diameter) = ur (relative magnetic permeability) = er (relative dielectric constant) = ### Skin Depth Calculator Dimensional units: metric english
 rho (resistivity, nOhms*m) = ur (relative magnetic permeability) = TC (temp coefficient, ppm/C) = T (operating temperture, Deg C) = Fo (frequency, MHz) = AWG (Wire Gauge) = Default Material = Copper

### Pi and Tee Attenuator Pad 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) =

### Y and Delta Network Transformation Y Impedance, R1 (Ohms) = Y Impedance, R2 (Ohms) = Y Impedance, R3 (Ohms) = Transform Y to Delta: Delta Impedance, Ra (Ohms) = Delta Impedance, Rb (Ohms) = Delta Impedance, Rc (Ohms) = Transform Delta to Y: Add Series/ Parallel Resistor: None R in Series with R1 R in Series with R2 R in Series with R3 R in Parallel with Ra R in Parallel with Rb R in Parallel Rc

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

### Return Loss and VSWR Port Z1 Real, Imaginary Impedance (Ohms) = ,j Port Z2 Real, Imaginary Impedance (Ohms) = ,j Reflection Coefficient (Lin Mag,Deg) = , Return Loss = S11 (dB, Deg)= , Mismatch Loss (ML, dB)= VSWR =

### Matching Network 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=

### Series to Parallel Impedance Conversion Series Impedance (Z=a+jb) Ohms = , j Parallel Impedance (Z=c//jd) Ohms = , j Z (Ohms, Deg) = , r+jx (Ohms) , j Operating Frequency (MHz) = C (pF) L (nH) Reference Impedance (Z0r,jZ0i) Ohms = , j VSWR =

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