Convert Planck mass to grain [gr] Online | Free weight-and-mass Converter
Planck Mass
The Planck mass is a fundamental physical constant in theoretical physics, representing a natural unit of mass based on fundamental constants: the speed of light, gravitational constant, and Planck’s constant.
Its value is approximately 2.18 × 10⁻⁸ kilograms (about 22 micrograms).
The Planck mass is significant in quantum gravity and string theory, marking a scale where quantum effects of gravity become strong and classical physics breaks down.
Summary:
Approximately 2.18 × 10⁻⁸ kg (22 micrograms)
Derived from fundamental physical constants
Important in quantum gravity and theoretical physics
Grain [gr]
The grain (gr) is one of the oldest units of mass, traditionally used in various weight systems including troy, apothecary, and avoirdupois.
One grain is defined as exactly 64.79891 milligrams (0.0648 grams). It was originally based on the weight of a single grain of barley or wheat.
Grains are still commonly used today to measure small quantities such as the weight of bullets, arrows, and some pharmaceuticals.
Summary:
1 grain = 64.79891 milligrams (0.0648 grams)
Used in troy, apothecary, and avoirdupois systems
Common in ammunition and medicine measurements