**Table of Contents**

A brief overview of some special menu items in KCalc:

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Display Pi, Euler Number or Golden Ratio.

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Display Light Speed, Elementary Charge, Impedance of Vacuum, Permeability of Vacuum or Permittivity of Vacuum.

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Display Planck's Constant, Elementary Charge or Fine-Structure Constant.

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Display Boltzmann Constant, Atomic Mass Unit, Molar Gas Constant, Stefan-Boltzmann Constant or Avogadro's Number.

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Display Constant of Gravitation or Earth Acceleration.

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Displays the simple math buttons.

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Displays trigonometric and science buttons.

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Displays statistic buttons.

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Displays logic buttons and allows changing the numeral system.

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Display constants buttons. They are available in science mode and statistic mode.

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Displays a bit edit field. Click on a bit to toggle it. Only available in numeral system mode.

Additionally KCalc has the common , , and menu items, for more information read the sections about the Menus in the KDE Fundamentals.