Calculators

Everyday calculations with topic-specific explanations

Azure cost scenarios from selected services and usage

Optimization models inside Excel worksheets

Mathematical calculators arranged by course topic

Solar-system ephemeris calculations with documented time spans

Observing calculators organized by telescope instrument

Depth-of-field and hyperfocal calculations

Algebra entry with solving, factoring and graphing modes

Room-mode calculations for rectangular and shaped rooms

Scientific expressions with dimensions checked as types

Numerical, symbolic and plotting tools for mathematical work

Symbolic transformations for very large expressions

Android scientific calculation with symbolic and graphical tools

A simplified photovoltaic energy-production estimate

Hydraulics and environmental-engineering calculations

Cutting plans for sheet, linear and roll materials

Thermal-comfort models with visible environmental inputs

Online cutting plans with printable reports

Calculators for primers, reaction setup and molecular quantities

Microwave network and transmission-line calculations

Editable calculation tapes with comments and recalculation

Mathematical problem entry with a structured symbol palette

Instrument-specific observing calculations

Molecular-biology quantities with visible formulas