Practical use
| Calculator name | Summary |
| Classic Calculator | This calculator is like 64-bit, but in the Keisan Online Calculator! |
| Court fees calculator for a civil case in Japan | This is a fee calculator in the court of Japan. It corresponds to the revision since 2007. |
| Day By Transistor Count | Find the day for a transistor count by typing in the number below. |
| Transistor Count | See the transistor count for any day by typing it in the box. |
