Converters
Author:

Taiji Yamada , Created: 07/14/2021, Last-modified:

07/14/2021
⸺ Conversion and its possible inverse conversion ⸺

Notice: According to the International System of Units (SI), a unit is not enclosed in brackets, but please note that brackets are used on this page to give priority to readability.

time ⏲️
time duration
↔︎
[ms] \(\mod 24\cdot 60\cdot 60\cdot 10^3\) \(=\)
[s]
time interval
↔︎
[ms] \(\mod 24\cdot 60\cdot 60\cdot 10^3\) \(=\)
[s]
date 📆️
date duration
↔︎
[ms] \(=\)
[day]
date interval
↔︎
[ms] \(=\)
[day]
datetime-local ⌚️
Notice: The input[type='datetime-local'] in this section is not supported by Mozilla families such as Firefox, works on Chrome, Edge, Safari and so on.

datetime duration
↔︎
[ms] \(=\)
[day] \(=\)
[h] \(=\)
[m] \(=\)
[s]
datetime interval
↔︎
[ms] \(=\)
[day] \(=\)
[h] \(=\)
[m] \(=\)
[s]
geographic 🧭️
coordinate
↔︎
+139.74135747 \(=\)
+139°44′28.8869″

A \(\pm\) specifies the north-south position for Latitude (緯度) and the east–west position for Longitude (経度).

units ⚛️
length 📏️
The definitions of units in this section are as follows. Others are by SI and other definitions.

ly light-year, a unit of length. 光年
Ss upper-bound sound second, a unit of length expresses 36100 [m] . 音速の上限×秒
ss sonic second, a unit of length expresses 1224/3600 [km] = 340 [m]. 音速×秒
length ly Ss Nm mil km ss m yd ft in cm cc nc pc mm dd nd bp pt μm sp nm Å pm
[c]

Set the value of one of the cells to zero to reset.

velocity 🚅️
The definitions of units in this section are as follows. Others are by SI and other definitions.

ly light-year, a unit of length. 光年
Jy Julian year, a unit of time expresses 31557600 [s]. ユリウス年
c light speed, a unit of velocity expresses 299792458 [m/s]. 光速
Ss upper-bound sound second, a unit of length expresses 36100 [m] . 音速の上限×秒
ss sonic second, a unit of length expresses 1224/3600 [km] = 340 [m]. 音速×秒
mach sonic speed, a unit of velocity expresses 1224 [km/h] = 340 [m/s]. 音速
time⧵length ly Ss Nm mil km ss m yd ft in cm cc nc pc mm
Jy [c]
h [kt] [mph]
min [fpm]
s [mach]

Set the value of one of the cells to zero to reset.

angle 📐️
The definitions of units in this section are as follows. Others are by SI and other definitions.

r rotations around a fixed axis expresses 2π [rad].
Set the value of one of the cells to zero to reset.

angular velocity ⚙️
time⧵angle r rad ° gon
h [rph]
min [rpm]
s [Hz][rps]

Set the value of one of the cells to zero to reset.

temperature 🌡️
The definitions of units in this section are as follows.

K the kelvin scale is the base unit of temperature in the SI.
0 [℃] = 273.15 [K], 100 [℃] = 373.15 [K].
℃ the Celsius scale is a unit of temperature.
℉ The Fahrenheit scale is a unit of temperature.
0 [℃] = 32 [℉], 100 [℃] = 212 [℉].
°R The Rankine scale is an absolute scale of temperature.
0 [℃] = 491.67 [°R], 100 [℃] = 671.67 [°R].
°D The Delisle scale is a unit of temperature.
0 [℃] = 150 [°D], 100 [℃] = 0 [°D].
°N The Newton scale is a unit of temperature.
0 [℃] = 0 [°N], 100 [℃] = 33 [°N].
°Ré The Réaumur scale is a unit of temperature.
0 [℃] = 0 [°Ré], 100 [℃] = 80 [°Ré].
°Rø The Rømer scale is a unit of temperature.
0 [℃] = 7.5 [°Rø], 100 [℃] = 60 [°Rø].
temperature K ℃ ℉ °R °D °N °Ré °Rø

When we need a conversion, we rarely need its inverse, but by always thinking about it we make new discoveries, rarely.
変換を必要とするとき、その逆変換が必要になることは稀だが、逆変換を常に考えることで新たな発見をすることが、稀にある。
Written by Taiji Yamada.