Electronics calculators.
Accurate calculators for electronic design, grounded in the standards (IPC, CISPR) and proven in our design house. Instant in-browser results with a shareable result link.
PCB Trace Impedance Calculator
To calculate PCB trace impedance, pick the geometry (microstrip or stripline), then enter trace width, copper thickness, dielectric height and the...
Resistor Color Code Calculator
To read a resistor color code, pick the number of bands (4, 5 or 6), then the color of each band. The calculator decodes the significant digits, the...
Reactance & LC Resonance Calculator
The resonant frequency of an LC circuit is f0 = 1/(2*pi*sqrt(L*C)). At a given frequency f, inductive reactance is XL = 2*pi*f*L and capacitive...
Voltage Divider Calculator
A voltage divider gives Vout = Vin x R2 / (R1 + R2). Enter Vin, R1 and R2: the calculator shows Vout live, snaps R1 and R2 to the nearest E12, E24 or...
Ohm's Law & Power Calculator
Enter any two of the four quantities (voltage V, current I, resistance R, power P) and the calculator solves the other two using Ohm's law and the...
Decibel Converter (dB, dBm)
Our decibel converter links absolute power (dBm, dBW, W, mW, uW) and dB ratios on one surface. Power uses 10 log10, voltage uses 20 log10 (because P...
Differential-pair impedance calculator (edge-coupled microstrip and stripline)
This calculator returns the differential impedance Zdiff of an edge-coupled pair, in microstrip or stripline. It first computes single-ended Z0 from...
Antenna Length Calculator (quarter-wave, half-wave, full-wave)
Enter frequency and velocity factor: we compute the physical length from c = 299792458 m/s. Half-wave = 0.5 x vf x lambda (total tip-to-tip length),...
PCB Trace Current Capacity Calculator (IPC-2221)
A trace's current capacity follows IPC-2221 section 6.2: I = k x dT^0.44 x A^0.725, where k = 0.048 for an external trace or 0.024 for an internal...
LoRaWAN Time on Air Calculator
A LoRa packet's time on air is ToA = Tpreamble + Tpayload, where Tsym = 2^SF / BW. Set SF, BW, CR, preamble, payload, header, CRC and LDRO: this...
Battery Life Estimator
Battery life is usable capacity divided by average current drawn. This AESTECHNO estimator returns runtime in hours, days or years from your capacity...
EMC Margin to CISPR / FCC Limit Calculator
Enter the raw analyzer reading, antenna factor, cable loss and preamp gain. The calculator corrects the emission, picks the CISPR or FCC limit by...