Physics Constants

📖 Introduction

Physical constants are the basic data of school physics and of science and engineering at university: the speed of light, the Planck constant, the gravitational constant, the elementary charge, the Avogadro constant, the Boltzmann constant, and so on. Anyone solving problems, writing reports or processing experimental data ends up looking them up again and again. This tool gathers the ninety eight most frequently used constants, each with its name, symbol, standard value, unit, category and a one line explanation, spread across eight areas: mechanics, thermodynamics, electromagnetism, optics, quantum physics, atomic physics, astronomy and chemistry. Values follow the CODATA recommended figures published by the International Science Council; constants that now serve as defining values of the International System of Units, such as the speed of light, the Planck constant and the elementary charge, are marked with their exact defined values. Type a keyword to search, browse by category, or click any row to open the full profile of that constant. All data is bundled locally, so no network connection is needed and nothing you type is collected. Students revising for an examination can filter to a single area, such as quantum physics, and read through the twenty two constants in that group as a checklist of what they are expected to recognise. Engineers and laboratory workers can search by symbol alone, typing c or h or G, which is faster than scanning a printed sheet. Each entry carries a short note explaining what the constant describes, so the table doubles as a revision aid rather than a bare list of numbers. Values that now serve as defining constants of the International System of Units are exact by definition, and the remaining ones carry the uncertainty implicit in the recommended figures. The whole table is embedded, so it opens instantly offline.

✨ Features

• Ninety eight common constants covering mechanics, thermodynamics, electromagnetism, optics, quantum, atomic, astronomy and chemistry.
• Each constant lists name, symbol, standard value, unit, category and a one line explanation.
• Values follow CODATA recommendations; constants used as SI defining values are marked exact.
• Search by name, symbol or explanation keyword and the list updates as you type.
• Filter by eight categories to revise a whole chapter systematically.
• Click any row in the list to expand the full profile card for that constant.

🚀 How to use

1. Type a keyword from the constant name, symbol or description into the search field.
2. Or use the category drop-down to browse by subject area.
3. Drag the row limit slider to control list length, up to two hundred rows.
4. Click any row to open the detailed profile of that constant.
5. Press copy to put the current list onto your clipboard.

⚠️ Notes

• Value basis. CODATA recommended values are used; different textbook editions may differ in the last digit.
• Scientific notation. Very small or large values use e notation, so 6.626e-34 means 6.626×10⁻³⁴.
• Unit rendering. Superscript minus signs use Unicode characters and a few fonts may render them oddly.
• Condition dependence. Values such as the speed of sound or density depend on temperature and pressure; standard conditions are assumed.
• Offline use. All data is bundled in the plugin, so lookup works without a network connection.