Reference
The numbers a calculation reaches for mid-flight: looked up here, cited where they came from, and one tap from the solver that needs them.
Constants →
361 constantsPhysical and mathematical constants, exact where they are exact and sourced where they are measured, each with the formulas that use it.
Fluids →
16 fluidsDensity, viscosity and specific heat at working temperatures for water, air, glycols and the other fluids real systems pump.
Interactive Charts →
drag and readA tangent sliding along a curve, strips filling the area under one, limits closing in from both sides, plus the steam and metal precipitation charts.
Metal Precipitation by pH →
hydroxide · sulfideThe classic mine-water chart: how much of each metal stays dissolved at each pH, and the pH window that clears your list.
Never-ending Constants →
11 constants · 10,000 digitsπ, e, the golden ratio, √2 and more, each to 10,000 digits with a button to copy as many as you need.
Periodic Table →
118 elementsEvery element’s numbers: atomic mass, density, melting and boiling points, electronegativity, and the rest of the row a chemistry problem asks for.
Steam Diagrams →
4 chartsThe pressure–enthalpy chart with a live reading, the Mollier chart, the T–s diagram and the saturation dome, drawn from IF-97 and printable.
Steam Tables →
IF-97Saturation both directions, superheat, and the region logic. The industrial formulation, not a scanned appendix.