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Date, number and measurement calculations

Programmable scientific arithmetic with saved formulas

Statistical calculations with method-selection guidance

Statistical power and effect-size calculation

Browser-based statistics from pasted data

Structural calculations with visible formulas and references

Interactive beam, frame and truss analysis

Beam analysis that can continue into a 2D model

Building-services calculations with visible equations

Physics calculations with visual explanations

Solar position, photovoltaic and map calculations

Solar movement and shadow information on a map

Location-based photovoltaic performance calculations

Panel cutting layouts and cabinetry cost calculations

Brewing recipe calculation across desktop and web

Map measurements, radii and geographic lookup tools

A map-tool collection for distances, areas and location lists

Air-travel carbon estimates with a published methodology

Editable notes with live scientific calculations

Notes, variables and arithmetic in a browser

A maintained HP-42S calculator simulator

Everyday calculation tools in one mobile app

Editable calculations with automatic dependency updates

Symbolic and numerical mathematics with notebook interfaces