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🔢 国际单位制词头换算SI Prefix Converter
在全部 24 个国际单位制(SI)词头之间精确换算,从昆它 Q(10³⁰)到亏科托 q(10⁻³⁰),例如 2.5 GHz = 2500 MHz、470 nF = 0.47 μF,采用十进制精确计算无浮点误差。Convert exactly between all 24 SI prefixes, from quetta Q (10³⁰) to quecto q (10⁻³⁰) — e.g. 2.5 GHz = 2500 MHz, 470 nF = 0.47 μF — using exact decimal arithmetic with no floating-point error.
使用说明与常见问题How-to & FAQ
「国际单位制词头换算」是什么?What is the SI Prefix Converter tool?
在全部 24 个国际单位制(SI)词头之间精确换算,从昆它 Q(10³⁰)到亏科托 q(10⁻³⁰),例如 2.5 GHz = 2500 MHz、470 nF = 0.47 μF,采用十进制精确计算无浮点误差。Convert exactly between all 24 SI prefixes, from quetta Q (10³⁰) to quecto q (10⁻³⁰) — e.g. 2.5 GHz = 2500 MHz, 470 nF = 0.47 μF — using exact decimal arithmetic with no floating-point error.
如何使用「国际单位制词头换算」?How do I use the SI Prefix Converter?
输入数值,选择它当前的词头,再填写单位符号(如 Hz、F、m、B),下方会列出它在每个词头下的精确数值,并标出最常用的写法。Enter a value, choose its current prefix and type the unit symbol (e.g. Hz, F, m, B); the list shows the exact value under every prefix and highlights the most natural one.
2022 年新增的 4 个词头是什么?What are the 4 prefixes added in 2022?
第 27 届国际计量大会新增了 ronna(R,10²⁷)、quetta(Q,10³⁰)、ronto(r,10⁻²⁷)和 quecto(q,10⁻³⁰),中文名称分别为容那、昆它、柔托、亏科托。The 27th CGPM added ronna (R, 10²⁷), quetta (Q, 10³⁰), ronto (r, 10⁻²⁷) and quecto (q, 10⁻³⁰).
KB、MB 是 1000 还是 1024?Is a KB 1000 or 1024 bytes?
按 SI 词头,k = 1000、M = 10⁶;表示 1024 倍数的是二进制词头 Ki、Mi、Gi(KiB、MiB、GiB)。Windows 显示的“GB”实际是 GiB,这也是硬盘容量看起来变小的原因。By SI rules k = 1000 and M = 10⁶; multiples of 1024 use binary prefixes Ki, Mi, Gi (KiB, MiB, GiB). Windows labels GiB as “GB”, which is why drives look smaller.
「国际单位制词头换算」免费吗?数据会上传吗?Is the SI Prefix Converter free? Is my data uploaded?
「国际单位制词头换算」完全免费,无需注册或安装,手机和电脑都能用;所有处理都在你的浏览器本地完成,输入的内容和文件不会上传到服务器。The SI Prefix Converter is completely free with no sign-up or install and works on phones and desktops; everything runs locally in your browser and nothing you enter is uploaded.