Unit conversions and collected numbers in cosmology

TL;DR

This paper provides a comprehensive reference of unit conversions, numerical values, and a Mathematica package for easy calculations in early universe cosmology, aiding quick estimates and conversions.

Contribution

It compiles essential unit conversions, properties, and introduces the NaturalUnits Mathematica package for streamlined cosmological calculations.

Findings

Includes tables for unit conversions and cosmic properties.

Provides a modifiable Mathematica package for unit conversions.

Serves as a quick reference for order-of-magnitude estimates.

Abstract

This note collects together useful unit conversions and numerical values from early universe cosmology. It is a quick reference that can be used to make easy order-of-magnitude estimates. Included are tables for unit conversions, the thermal history of the universe, and collected properties of astronomical objects. The note also introduces a modifiable Mathematica package NaturalUnits (newest version 2.0), which makes it easy to convert between natural and physical units.