| Subject | English | German |
| math. | Euler constant | Euler-Konstante (e=2,71828...) |
| gen. | Euler constant | Euler-Konstante e=2,71828... |
| math. | Euler's constant | Euler-Konstante (e=2,71828...) |
| tech. | Euler's constant | Euler'sche Konstante |
| gen. | Euler's constant | Euler-Konstante e=2,71828... |