The key of C Major has no accidentals; therefore, its numeric value is 0.
（C大調沒有變音記號，所以其值為零）
The key of D Major has two sharps; thus, its numeric value is 2.
（D大調有兩個升號，其值為2）
The key of E Major has four sharps - a numeric value of 4.
（E大調有四個升號，其值為4）
The key of G Major has one sharp. Its numeric value is 1.
（G大調有一個升號，其值為1）
The key of A Major has three sharps - a numeric value of 3.
（A大調有三個升號，其值為3）
Finally, the key of B Major has five sharps - giving it a numeric value of 5.
（最後，B大調有5個升號，其值為5）
These seven values must be memorized before we can proceed.
（這七個值必須記住才能繼續進行下面的計算）
Next, let's compare C-flat, C, and C-sharp Major.
（接下來比較一下降C大調，C大調，升C大調）
If we start at C Major and subtract 7, we end up at C-flat Major.
（從C大調開始減去7，就得到降C大調）
If we start at C Major and add 7, we end up at C-sharp Major.
（從C大調開始加上7，就得到升C大調）
To convert to E-flat Major, subtract 7.
（減去7即可轉換為降E大調）
The result is -3; thus, E-flat Major has 3 flats.
（4-7=-3，所以降E大調有3個降號）
Let's try F-sharp Major. Start with F Major, which is -1.
（我們來試一下升F大調，從值為-1的F大調開始）
The result is 6; thus, F-sharp Major has 6 sharps.
（-1+7=6，所以升F大調有6個升號）
Next, we will examine minor scales. Compare C Major and C Minor.
（接下來我們來驗證一下小調。比較一下C大調和C小調）
To convert a major scale into its parallel minor, simply subtract 3.
（要轉換大調到它的小調去，只要減去3即可）
Let's calculate D Minor. We will start with D Major, which is 2.
（我們來計算一下D小調，從值為2的D大調開始）
The result is -1. Therefore, D Minor has one 1 flat.
（得到-1，所以，D小調有1個降號）
Next, let's try F Minor. We will start with F Major, which is -1.
（接下來我們試一下F小調，從值為-1的F大調開始）
The result is -4. Thus, F Minor has 4 flats.
（得到-4，所以，F小調有4個降號）
Start with C Major, which has a numeric value of 0.
（從值為0的C大調開始）
Finally, subtract 3 to convert to C-sharp Minor.
（最後減去3即可得出升C小調）
The result is 4. C-sharp Minor therefore has 4 sharps.
（7-3=4，所以，升C的小調有4個升號）
While these exist in theory; in practice, they would not be used.
（當然這只是理論性的，在實踐中不會用）
Start with G Major, which has a numeric value of 1.
（從值為1的G大調開始）
Use this chart for reference to the key signature calculation method.
（這就是調號的計算方法）