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Practical finance, cooking and unit calculations

A catalogue of practical and specialist calculations

Focused browser calculators for statistical questions

Epidemiological calculations for surveys and test performance

Statistical power and effect-size calculation

Browser tools for beam and structural calculations

Building-services calculations with visible equations

Physics calculations with visual explanations

RF and microwave calculations with formula references

Solar position, photovoltaic and map calculations

Location-based photovoltaic performance calculations

Audio, acoustics and electrical calculation references

Editable notes with live scientific calculations

Notes, variables and arithmetic in a browser

Mathematical documents that combine solutions and visualization

Heat-network and district-energy scenario calculations

Calculated physical and chemical protein parameters

Laboratory calculations beside molecular-biology utilities

Weather quantities with linked formulas

Adaptive forms with conversational questions and response analysis

Construct rate curves and inspect fixed-income price sensitivities

Automatically track work time and review it alongside project and productivity reports.

Market charts, screeners and custom indicators with a free account

Track employee attendance from mobile devices with location checks, shift controls, and automated work-hour reports.