Category
Science calculators.
3D engineering simulators and lab tools, plus weather and air calculators, with real-time, shareable results.
3D simulators & lab tools
See all simulators → IC Engine Simulator Interactive 3D four-stroke internal-combustion engine — watch intake, compression, power and exhaust with live pistons, crankshaft and valves, rendered with WebGPU. Turbocharger Simulator A live 3D turbocharger on a real physics model — spool it up and watch turbo lag, hold boost with the wastegate, cross a compressor map, and make it surge on a lift-off. Thermodynamic Cycles Simulator Run Otto, Diesel, Dual, Brayton, Rankine, Carnot, Stirling, Ericsson and Atkinson on one 3D machine beside a live P–v and T–s diagram — efficiency against the Carnot limit, net work, and every state point. Refrigeration Cycle Simulator A vapour-compression cycle shown as a machine and as a P–h chart at once — COP, refrigerating effect, compressor work and quality, on six refrigerants, cooling or heating. Heat Exchanger Simulator A shell-and-tube exchanger and its temperature profile on one shared axis — drag along the length to read the local driving difference, and get LMTD, NTU, effectiveness and duty for counter, parallel and cross flow. Heat Transfer Calculator Conduction, convection and radiation on one instrument — with h computed from real Nusselt correlations instead of typed in, and every mode shown as a thermal resistance so Q = ΔT/R holds in all three. Psychrometric Chart Drag a state point across an interactive psychrometric chart and read dry-bulb, wet-bulb, dew point, relative humidity, humidity ratio, enthalpy and specific volume at once — corrected for altitude, in SI or IP. Collision & Momentum Simulator Five real rigs on one 3D stage — air track, air table, ballistic pendulum, Newton’s cradle and a crash rig — with a live conservation ledger for momentum and kinetic energy, elastic through perfectly inelastic. Vernier Caliper Simulator Drag a working vernier caliper and read it at 0.02, 0.05 or 0.1 mm least count, with the arithmetic written out, zero error correction and practice and quiz modes. Resistor Color Code Calculator Decode any 3, 4, 5 or 6-band resistor on a photoreal 3D part — resistance, tolerance, true range, temperature coefficient and the E-series value it belongs to, with a warning when the combination is one no manufacturer ships.
Weather & air calculators
Dew Point Calculator Calculate dew point, absolute humidity, wet-bulb temperature and vapor pressure from air temperature and relative humidity. Heat Index Calculator Calculate the apparent "feels-like" temperature in heat using the NWS Heat Index equation with danger level indicator. Wind Chill Calculator Calculate the perceived temperature in cold and windy conditions using the NWS 2001 Wind Chill formula. Humidity Calculator Convert between relative humidity, absolute humidity, specific humidity and dew point temperature. Altitude & Pressure Convert between altitude and atmospheric pressure using the International Standard Atmosphere model.