FAQ

Select a cell and use a shortcut key to copy it.

OS	Copy shortcut keys
Windows	[Ctrl]+C
Mac	[Command]+C

To select a range
of cells, click the starting cell with the mouse, then hold down the [Shift] key and select the ending cell. The selected range will turn light blue; use the shortcut key while the range is highlighted to copy it. You can then paste this into Excel or other applications.

In principle, you are free to link to the Keisan website; however, we reserve the right to refuse links at our discretion. Please
also note that even if we have granted permission to link, we may revoke that permission due to circumstances that come to light after permission has been granted.

Your browser's cache may be causing this issue. Please try the following steps in order:

(1) Click "Refresh" before performing
the calculation

For Windows
Edge	[Ctrl] + [R] or [F5]
Chrome	[Ctrl] + [F5] or [Shift] + [F5]
For Mac
Chrome	[Command] + R
Safari	[Command] + R, [Command] + [Option] + E

(2) Restart all browsers and then run the calculation
(3) Clear the cache and then run
the calculation Please check the support sites for each browser.

Using your browser’s print function may prevent the calculation results table from printing properly.
In this case, please print using the “Print” button that appears after you run the calculation. (The “Print” button appears only when the results are displayed as a table.)

The "Save and Recall Input Values" feature is not intended for saving calculation results. It is a feature that allows you to save values you have entered and recall them when needed. Enter a name in the [Name] field under
[Save and Recall Input Values] and click [Save] to save the input data under the specified name.
To retrieve input data, click the corresponding name in the [Save/Recall Input Values] list to select it in the [Name] field, then click [Recall] to load it into the library.
You must be logged in to use this feature.

If there is an input table in the keisan library, select the cells where you want to paste the data, then use the shortcut key to paste the Excel data.

OS	Shortcut Keys
Windows	[Ctrl]+V
Mac	[Command]+V

Click the “Save Image” button on the graph settings screen to download the graph as a PNG image.

OS	Recommended Browsers
Windows	・Google Chrome (latest version) ・Microsoft Edge (latest version) ・Mozilla Firefox (latest version)
Mac / iOS	・Safari (latest version)
Android	・Chrome (latest version)

While this does not mean the site will not work on other browsers, we have not tested them.

This calculation site does not guarantee the accuracy of all results or images.
If a calculation result is incorrect, please provide details in the survey displayed after the calculation is completed.
Example: When the variable value is XXXXX, the answer is incorrect. The correct answer is 〇〇〇〇.

We are not currently accepting requests.

A timeout may occur if execution takes approximately 10 seconds or longer. Timeouts may occur when executing complex functions or when the number of iterations is high. Please change the values of the variables or reduce the number of iterations, then try running the calculation again. Additionally, for the expression library where the number of digits can be adjusted, please try reducing the number of digits and running the calculation again.

Formulas that remain unused for a certain period of time may be deleted. Formulas that contain inappropriate expressions may also be subject to deletion.

Creating user formulas that ask for personal information (Japan’s My Number) is prohibited because this may constitute collection outside legally permitted purposes.

Basically, all you have to do is enter an expression and click the “Calculate” button. Just like with a
regular calculation, for example, if you enter (2+3)*4 and click the “Calculate” button, 20 will appear in the answer field.

In the function list to the right of the “Free Calculator,” you can click a button to insert the function name into your expression.

You can freely change the number of digits for calculations if a drop-down menu for the number of digits is displayed in the upper-right corner of the library execution screen; however, you cannot change it if this menu is not displayed. For FREE calculations, you can freely change the number of digits.

You can use keisan without registering, but if you register, you’ll be able to use the following services:
• Registering custom formulas • Saving and retrieving input values for
libraries and formulas in “Free Calculation”

Please reset your password.

There are absolutely no charges. Please feel free to use it with confidence.

No application is required for publication, but we would appreciate it if you could let us know when you plan to publish it.

In the soft key settings located on the right side of the center of the screen, set type=text → “Settings.” • Selecting
“text” enables text input, and the soft keyboard defaults to text mode.
• Selecting “number” disables text input, and the soft keyboard defaults to number mode.

The unit of the answer varies depending on the units of the input parameters (length, width, height, etc.).

Input Units		Result Unit (Area)	Result Unit (Area)
mm	→	mm²	mm³
cm	→	cm²	cm³
m	→	m²	m³
km	→	km²	km³

Please check to see if your browser is in private mode (the name varies by browser). If you are in private mode, bookmarks will not be saved when you close the browser.

Please use a regular window.

Please use your browser in private mode (the name varies by browser). In private mode, your browsing history, cookies, and other data are not saved by the browser once you close it.

・Incognito Window (Chrome)
・InPrivate Window (Edge)
・Private Window (Firefox)
・Private Browsing (Mac Safari)

You can create custom formulas while logged in. If you haven’t registered yet, please register first and then log in.

Select “Custom Formulas” → “My Custom Formulas” from the menu bar on the PC screen, and then click the “New” or “Edit” icon on this screen to create a custom formula.