Electronics calculators — batteries, circuits, PCB traces and signal maths.
Electronics calculators — batteries, circuits, PCB traces and signal maths.
Battery Capacity Calculator
Battery energy capacity in watt-hours and milliamp-hours from voltage and amp-hours, with runtime at a given load.
Open Battery Capacity Calculator →Battery Life Calculator
How long a battery lasts from its capacity and the device’s current draw, with a derating for real-world efficiency.
Open Battery Life Calculator →Cable Impedance Calculator
Coaxial cable characteristic impedance from inner and outer conductor diameters and the dielectric constant, with velocity factor.
Open Cable Impedance Calculator →Duty Cycle Calculator
Duty cycle, off time and frequency from on time and period, with average voltage for a pulsed waveform.
Open Duty Cycle Calculator →Hamming Code Calculator
Encode 4 data bits as a Hamming(7,4) codeword with even or odd parity, showing each parity bit and the transmitted codeword.
Open Hamming Code Calculator →LM317 Calculator
LM317 adjustable regulator output voltage from R1 and R2, including the small adjustment-pin current term.
Open LM317 Calculator →Logic Gate Simulator
Interactive logic gate simulator: pick a gate, toggle inputs A and B, and see the output with the full truth table.
Open Logic Gate Simulator →Op-Amp Gain Calculator
Op-amp gain for inverting and non-inverting configurations from R1 and R2, with output voltage and gain in decibels.
Open Op-Amp Gain Calculator →Parity Bit Calculator
Even and odd parity bits for a binary string, with the transmitted word and the count of ones.
Open Parity Bit Calculator →PCB Trace Calculator
PCB trace width from current, temperature rise and copper weight using the IPC-2221 approximation, for external or internal layers.
Open PCB Trace Calculator →Pi Attenuator Calculator
Pi-network attenuator resistor values from attenuation in decibels and system impedance.
Open Pi Attenuator Calculator →RAM Latency Calculator
True RAM latency in nanoseconds from CAS latency and memory speed, with theoretical memory bandwidth.
Open RAM Latency Calculator →Speaker Box Calculator
Sealed speaker enclosure volume from driver Thiele-Small parameters, with system resonance for a chosen target Qtc.
Open Speaker Box Calculator →Total Harmonic Distortion Calculator
Total harmonic distortion from a list of harmonic amplitudes, in percent and decibels, from the fundamental onwards.
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