Wavelength Calculator

Free amplitude calculator — find amplitude, period, frequency, and phase shift of y = A·sin(Bx + C) + D, with a live animated wave.

Free analog-to-digital calculator — bit depth, quantization levels, sample rate, bit rate, and Nyquist check, with an animated sampling diagram.

Free thin-lens calculator — image distance, magnification, real or virtual, upright or inverted, with a live ray diagram showing the parallel, focal and central rays bending through a convex or concave lens.

Free speed of sound calculator — speed in air by temperature plus water, steel and other media, with Mach number and distance from an echo delay.

Free gear ratio calculator — output speed, torque and direction across a train of up to five gears, with the gears turning on screen at their real relative speeds.

Free SHM calculator for a pendulum or a mass on a spring — period, frequency, angular frequency, maximum speed and acceleration, with a live animation beside a synchronised graph of position, velocity and acceleration.