Science tools
Chemistry, physics and energy calculators. Everything runs in the browser. Inputs are kept in the URL, so any result can be bookmarked or shared.
Energy
Energy Compare
Compare retail electricity plans against your own half-hourly usage, from an Australian NMI interval export. Covers time-of-use windows, supply charges, controlled load and solar credits.
Appliance & Load Shifter
Running cost for an appliance, and the saving from shifting it off peak.
Chemistry
Molar Mass & Stoichiometry
Molar mass, mass percentage composition, and conversion between grams, moles and molecules.
Equation Balancer
Smallest whole-number coefficients, by Gaussian elimination over exact fractions.
Interactive Periodic Table
118 elements, with heatmaps for electronegativity, radius, ionisation energy and more.
Physics
Projectile Simulator
Trajectories with adjustable angle, speed, height and gravity. Optional quadratic drag.
Snell's Law Ray Tracer
Refraction at a boundary, with the critical angle and total internal reflection.
RLC Resonance Analyzer
Resonant frequency, Q and bandwidth, with Bode magnitude and phase plots.