How many genkoyoshi sheets does my text need?
Japanese manuscript paper (原稿用紙, genkoyoshi) is ruled into a 20-by-20 grid of 400 squares per sheet, one character per square, so the number of sheets needed is simply the character count divided by 400, rounded up to the next whole sheet.
Whether spaces count as a square and how a line break is handled both affect the final count, since a paragraph break in traditional genkoyoshi rules leaves the rest of that row blank rather than wrapping to the very next square — this tool lets you toggle both rules to match your assignment's requirements.
How many 400-character genkoyoshi sheets does 800 characters need?
Divide the character count by 400 (the number of squares on one sheet) and round up to the next whole sheet, since a partial sheet still counts as one. Example: 800 characters divide evenly into exactly 2 sheets (800 / 400 = 2), while 801 characters need 3 sheets because the leftover 1 character still needs its own sheet.
Steps to calculate sheets needed
- Decide whether spaces should count as a filled square — some assignments count every space, others only count visible characters.
- Decide how a line break (paragraph change) is handled: as a single counted character, or using the traditional genkoyoshi rule where the rest of that row is left blank and the next paragraph starts on a fresh row.
- Count the characters in your text according to those two rules.
- Divide the resulting count by 400, the fixed number of squares per sheet (20 columns x 20 rows).
- Round the result up to the next whole number, since any characters beyond a full sheet still require a new sheet.
The sheet-count formula
sheets needed = ceil(effective character count / 400) | with traditional newline rule: each line's character count rounds up to the next multiple of 20 before summing
- One sheet = 20 columns x 20 rows = 400 squares, one character per square
- "Fill rest of the row" (traditional rule) = a paragraph break consumes the remaining squares in its row rather than continuing into the very next square
Quick genko-yoshi answers
How many 400-character genko-yoshi sheets does 2,000 characters fill?
Exactly 5 sheets (2000 / 400 = 5, no remainder).
How many sheets does 401 characters need?
2 sheets -- going even 1 character over 400 rounds up to the next sheet (ceil(401/400) = 2).
Are small tsu (っ) or punctuation marks handled specially when counting cells?
No -- this tool counts punctuation and small tsu the same as any other character, 1 character = 1 cell. It doesn't apply traditional line-break rules (kinsoku) like hanging punctuation.
How are line breaks counted?
Two modes are available: 'newline = 1 character' counts each line break as one cell, while 'fill to line end' pads the rest of that 20-character line with blanks and continues at the start of the next line.
Can I choose whether spaces count toward the character total?
Yes -- a checkbox toggles whether half-width and full-width (U+3000) spaces are counted.
How many characters are in one line and one full sheet?
20 characters per line, 20 lines per sheet -- 400 characters total.
How many sheets does exactly 800 characters fill?
Exactly 2 sheets (800 / 400 = 2, no remainder).
How many sheets does 399 characters need?
1 sheet -- ceil(399/400) = 1, just short of filling the sheet completely.
Example sheet counts
| Character count | Sheets needed |
|---|
| 400 | 1 |
| 401 | 2 |
| 800 | 2 |
| 1,200 | 3 |
Frequently asked questions
Why does 401 characters need 2 sheets instead of 1.0025 sheets?
Manuscript paper is physical — you cannot use a fraction of a sheet, so any character count that exceeds a whole multiple of 400 requires starting a new sheet, even if only 1 character spills onto it.
Should I count spaces as characters on genkoyoshi?
It depends on the assignment or publisher's rules — Japanese text often has no spaces between words, so this mainly matters for text with Latin words, numbers, or intentional spacing; this tool lets you toggle whether spaces count toward the 400-square total.
Why does a line break sometimes cost more than 1 square?
Traditional genkoyoshi writing rules dedicate the current row to the current paragraph — when a paragraph ends before reaching the 20th column, the remaining squares in that row are left blank rather than being filled by the next paragraph's text, which increases the effective count beyond just adding 1 for the line break itself.
Does the grid preview show my entire text?
No, the grid shows only the first 400 characters (one sheet) as a visual reference; the sheet count above it reflects your entire text regardless of length.
This tool counts characters and calculates sheets using the standard 400-character (20x20) genkoyoshi format; it does not apply kinsoku shori (line-break prohibition rules for punctuation) or the specific house rules some publishers use for how quotation marks and ellipses occupy a square.