Newly listed sites

Scientific, graphing, fraction and matrix calculations

Editable calculation tapes with comments and recalculation

Practical telescope and observing calculations

Depth-of-field and hyperfocal calculations

Educational aviation and atmosphere calculations

Airfoil comparison, plotting and geometry calculations

Radio and circuit calculations for component design

RF coil, antenna and related engineering calculations

Electronics formulas from components to power supplies

Weather quantities with linked formulas

Observing calculators organized by telescope instrument

Instrument-specific observing calculations

Solar-system ephemeris calculations with documented time spans

Nucleic-acid folding calculations with explicit constraints

Chemical calculations with balancing and molar-mass tools

Calculators for primers, reaction setup and molecular quantities

Molecular-biology quantities with visible formulas

Primer-property and secondary-structure calculations

Laboratory calculations beside molecular-biology utilities

Calculated physical and chemical protein parameters

Molecular masses, formulas and isotope distributions

Energy-system performance and financial calculations

A simplified photovoltaic energy-production estimate

Heat-network and district-energy scenario calculations