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SI Units

October 15, 2025
August 28, 2015

International System of Units - Wikiwand
SI Redefinition | NIST redefinition of the 7 SI units based on' nature's fundamental constants

Sixty Symbols - Physics and Astronomy videos
Is The Metric System Actually Better? - YouTube
The kg is dead, long live the kg - YouTube

Seven Dimensions - YouTube use SI units as basis and matrices for unit conversion

Origins of Precision - YouTube

The curious origins of imperial and metric units - YouTube

The Efficient Engineer
Understanding Engineering Drawings - YouTube
Understanding GD&T - YouTube tolerance

國家教育研究院雙語詞彙、學術名詞暨辭書資訊網 translations for scientific terms

Dimensional Analysis

analysis on unit

Bomb Blast Radius - Numberphile - YouTube
Cursed Units - YouTube

Bizarre Units used by Scientists - Sixty Symbols - YouTube

Structural Shapes

Structural Shapes Ranked and Reviewed - Which one Wins? - YouTube

Why Are I-Beams Shaped Like An I? - YouTube

Time (s)

1 秒持续多长时间?从日晷到原子钟——时间单位的变迁 - YouTube
How Do Atomic Clocks Work? - YouTube

How the Germans Measured Milliseconds MECHANICALLY - Smarter Every Day 283 - YouTube

Length (m)

一米有多长?地球周长约等于 4 万公里是巧合吗?长度单位米的由来 - YouTube
Who Invented the Meter? - YouTube

Mass (kg)

1 千克有多重?修改教科书再见大 K!如何用普朗克常数定义千克? - YouTube
Demise of the Kilogram - Sixty Symbols - YouTube

Temperature (K)

Celsius - Wikiwand
Fahrenheit - Wikiwand the temperature of a human body (around 98 degrees Fahrenheit) and the temperature of salt and ice (0 °F).
Kelvin - Wikiwand
Convert Celsius to Fahrenheit
Temperature Is Not What You Think It Is | WIRED

甚麼攝氏和華氏溫度標準!? 世界只餘下一個大國使用華氏!? (繁體中文字幕) - YouTube

The Science of Temperature Is Weirder Than You Think | WIRED
Build a Thermoelectric Generator, Like the Ones That Power Deep Space Missions | WIRED

Electrical Current (A)

Chemical Amount (mol)

1 摩尔有多少个?(1)相对原子质量的由来 - YouTube
1 摩尔有多少个?(2)从原子量到阿伏伽德罗常数 - YouTube

Luminous Intensity (cd)

1 坎德拉有多亮?人眼为什么能看到五光十色?如何衡量发光强度? - YouTube candela

Storage Size (B)

SI/JEDEC: 1000B = 1kB (SI), 1KB (JEDEC)
IEC: 1024B = 1KiB

pretty-bytes - npm
byte-size - npm
human-readable - npm
@tsmx/human-readable - npm

Format byte size as kilobytes, megabytes, gigabytes, ... · YourBasic Go