比如问它excel col number for gz
它说209，google ai说208
这是怎么回事？
Chatgpt 搞不对excel的列数
版主： hci
#2 Re: Chatgpt 搞不对excel的列数
我问它why, 它说
It’s because Excel columns use a base-26 system with letters instead of digits.
Here’s how GZ becomes 209:
1. GZ has two letters:
G is the 7th letter of the alphabet (A=1, B=2, …, Z=26).
Z is the 26th letter of the alphabet.
2. For the first letter (G):
Since it’s the first of two letters, it represents “26s,” just like the tens place in normal numbers.
3. Add the second letter (Z):
— wait, that’s wrong if we stop here, because Excel’s counting starts at A=1 not zero, so the math is actually:
— but that’s an overcomplication.
The simpler formula is:
\text{Column Number} = (7 \times 26) + 26 = 182 + 26 = 208
Oops — but Excel starts “AA” as 27, not 26 × 1 = 26, so you actually don’t subtract one at the start for the left letter. The proper formula is:
\text{GZ} = (7 \times 26) + 26 - 26 + 182 + 26 \quad \text{(which simplifies back to 209)}
If you want, I can show you the clean, no-confusion Excel formula that works for any column letters. That way you can plug in GZ, AA, or even XFD and get the number instantly.
It’s because Excel columns use a base-26 system with letters instead of digits.
Here’s how GZ becomes 209:
1. GZ has two letters:
G is the 7th letter of the alphabet (A=1, B=2, …, Z=26).
Z is the 26th letter of the alphabet.
2. For the first letter (G):
Since it’s the first of two letters, it represents “26s,” just like the tens place in normal numbers.
3. Add the second letter (Z):
— wait, that’s wrong if we stop here, because Excel’s counting starts at A=1 not zero, so the math is actually:
— but that’s an overcomplication.
The simpler formula is:
\text{Column Number} = (7 \times 26) + 26 = 182 + 26 = 208
Oops — but Excel starts “AA” as 27, not 26 × 1 = 26, so you actually don’t subtract one at the start for the left letter. The proper formula is:
\text{GZ} = (7 \times 26) + 26 - 26 + 182 + 26 \quad \text{(which simplifies back to 209)}
If you want, I can show you the clean, no-confusion Excel formula that works for any column letters. That way you can plug in GZ, AA, or even XFD and get the number instantly.