提供以英吋為單位的紙張尺寸表,能精確列出 A4、美國 Letter、Legal 等標準紙張的尺寸,測量單位為英吋,方便查閱。無論您正在設定列印專案、設計文件,或設定印表機,了解以英吋計算的精確寬度與高度,可確保您的作品符合目標紙張大小。紙張尺寸表工具提供完整的參考表,收錄超過 30 種紙張尺寸,涵蓋 ISO A 與 B 系列、美國規格,以及信封,尺寸以公釐、公分與英吋顯示。除了基本測量外,此工具還能在任何 DPI 下將任何紙張尺寸轉換為像素,非常適合數位設計、網頁圖形或印刷用檔案。無需下載或上傳——所有功能直接在您的瀏覽器中運作,您甚至可以將圖表儲存為 PDF 以供離線使用。
紙張尺寸因地區與用途而異。ISO A 系列除了北美之外全球通用,從 A0 (33.11 × 46.81 英吋) 開始,每往下一個尺寸面積減半 (A1、A2、A3、A4 等)。B 系列提供中間尺寸,而美國系統則包含 Letter (8.5 × 11 英吋)、Legal (8.5 × 14 英吋) 和 Tabloid (11 × 17 英吋)。舉例來說,A4 略窄且略高於美國 Letter,若未注意其差異可能導致對齊問題。紙張尺寸表將所有這些尺寸並列,方便您一目了然地進行比較,避免在專案中出現尺寸不符的情況。
如果您正在處理數位檔案,將紙張尺寸轉換為像素對於在 Photoshop、Illustrator 或 Canva 等設計軟體中設定畫布至關重要。解析度 (DPI) 決定一英吋內可容納多少像素——300 DPI 是高品質印刷的標準,而 72 DPI 則是網頁或螢幕使用的典型值。例如,A4 紙張在 300 DPI 下的尺寸為 2480 × 3508 像素,而同樣的尺寸在 72 DPI 下則為 595 × 842 像素。紙張尺寸表工具可即時計算這些數值,省去手動換算或猜測的麻煩。這對設計師、開發人員或任何準備印刷或數位發行檔案的人特別實用。

為什麼您需要以英吋為單位的紙張尺寸表
使用以英吋為單位的紙張尺寸表能幫助您避免常見錯誤,例如在錯誤的紙張尺寸上列印文件,或設計的圖形不符合目標紙張大小。舉例來說,如果您要為美國觀眾製作傳單,您可能會使用美國 Letter (8.5 × 11 英吋),而國際專案可能需要 A4 (8.27 × 11.69 英吋)。差異看似微小,但可能導致文字對齊錯誤、影像被裁切,或浪費紙張。尺寸表能確保您從一開始就選擇正確的尺寸,無論您是在列印、掃描或設計。
除了列印專案外,以英吋為單位的紙張尺寸表對數位工作流程也很有用。如果您要將 PDF 或影像匯出為特定紙張尺寸,了解以英吋 (及像素) 為單位的精確尺寸可幫助您正確設定畫布。舉例來說,如果您正在設計名片,您可能需要知道標準的美國名片為 3.5 × 2 英吋,而 ISO A8 名片則為 2.17 × 3.15 英吋。紙張尺寸表提供所有常見尺寸的這些細節,讓您能依據正確的規格來調整作品。
另一個重要優點是相容性。許多印表機、掃描器和軟體應用程式會預設特定的紙張尺寸,使用錯誤的尺寸可能導致錯誤或格式問題。舉例來說,如果您正在掃描文件並希望將其儲存為 PDF,了解以英吋為單位的紙張尺寸可確保輸出符合原始文件。同樣地,如果您要將 PDF 轉換為其他格式 (如 JPG 或 PNG),工具的像素轉換功能可幫助您維持正確的長寬比。該圖表還包含較不常見的尺寸,例如信封 (C4、DL) 或工程紙 (ANSI A、B),是任何專案的多用途資源。
如何使用紙張尺寸表工具取得以英吋為單位的尺寸
- 在您的瀏覽器中開啟紙張尺寸表工具。無需下載或註冊。
- 瀏覽參考表,從 A 系列、B 系列或美國系列中找到您的紙張尺寸。尺寸以公釐、公分與英吋顯示。
- 如果您需要像素尺寸,請從轉換器區塊的下拉選單中選擇您的紙張尺寸。工具會載入其精確的測量值。
- 在提供的欄位中輸入您需要的解析度 (DPI)。列印請使用 300 DPI;螢幕或網頁請使用 72 DPI。
- 讀取與公釐、公分、英吋值並列顯示的像素寬度與高度。這些數值會根據您輸入的 DPI 即時計算。
- 若要將圖表儲存供離線使用,請點選「Download as PDF」按鈕。該檔案將包含所有紙張尺寸及其以英吋、公釐和公分為單位的尺寸。
為數位專案將紙張尺寸轉換為像素
在進行數位專案時,將紙張尺寸轉換為像素可確保您的設計符合預期輸出。您選擇的解析度 (DPI) 決定像素尺寸——較高的 DPI 代表每英吋有更多像素,進而使影像在列印時更為清晰。例如,A4 紙張在 300 DPI 下為 2480 × 3508 像素,而同樣的尺寸在 72 DPI 下為 595 × 842 像素。紙張尺寸表工具會自動執行此轉換,讓您無需手動計算。
此功能對需要為特定紙張尺寸建立檔案的設計師、攝影師或開發人員特別實用。舉例來說,如果您要為印刷設計海報,您會希望使用 300 DPI 以確保高品質。另一方面,如果您要為網站或社群媒體製作圖形,72 DPI 即已足夠,並能保持較小的檔案大小。此工具可讓您在不同解析度間切換,查看像素尺寸如何變化,協助您為專案選擇正確的設定。
以下是常見紙張尺寸在不同 DPI 下的像素尺寸快速比較:
| 紙張尺寸 | 尺寸 (英吋) | 72 DPI 下的像素 | 300 DPI 下的像素 |
|---|---|---|---|
| A4 | 8.27 × 11.69 | 595 × 842 | 2480 × 3508 |
| US Letter | 8.5 × 11 | 612 × 792 | 2550 × 3300 |
| Legal | 8.5 × 14 | 612 × 1008 | 2550 × 4200 |
| A5 | 5.83 × 8.27 | 420 × 595 | 1748 × 2480 |
對於需要自訂解析度的專案,此工具允許您輸入任何 DPI 值,不限於 72 或 300。這種彈性非常適合特殊應用,例如大尺寸印刷或專業數位顯示器。無論您正在準備看板、名片或行動應用程式的檔案,此工具都能確保您的尺寸精確無誤。
將紙張尺寸表下載為 PDF
紙張尺寸表工具可讓您將整份參考表下載為 PDF,方便您離線存取或與同事分享。該 PDF 包含所有標準紙張尺寸的公釐、公分與英吋尺寸,是印表機操作員、設計師或任何經常處理紙張的人實用的資源。若要下載,只需在工具頁面上點選「Download as PDF」按鈕。檔案會即時在您的瀏覽器中產生,無需上傳或註冊。
擁有 PDF 版本的圖表在多個方面都很實用。首先,當您不在電腦旁或無法存取網路時,它可作為快速參考。其次,您可以將其列印出來,放在桌上或工作區中方便取用。第三,這是與他人 (例如需要了解紙張尺寸以利專案進行的客戶或團隊成員) 分享資訊的絕佳方式。PDF 格式清晰明瞭,每個紙張尺寸皆與其測量值並列,方便閱讀與使用。
如果您正在進行涉及多種紙張尺寸的專案,PDF 可幫助您保持井然有序。舉例來說,如果您要為客戶設計一整套文件,您可以參考 PDF 以確保所有檔案皆設定為正確的尺寸。同樣地,如果您要準備列印工作,您可以在將檔案送至印表機前再次確認紙張尺寸。該 PDF 還包含對不同紙張系列 (A、B、US) 的簡要說明,因此也是一個有用的教育資源。
Common Paper Sizes and Their Uses
Understanding the most common paper sizes and their typical uses can help you choose the right one for your project. Here’s a breakdown of the most widely used sizes in the A series, B series, and US system:
| Paper Size | Dimensions (Inches) | Common Uses |
|---|---|---|
| A0 | 33.11 × 46.81 | Technical drawings, posters, large-format printing |
| A1 | 23.39 × 33.11 | Architectural plans, engineering diagrams, presentations |
| A2 | 16.54 × 23.39 | Charts, diagrams, medium-sized posters |
| A3 | 11.69 × 16.54 | Magazine spreads, brochures, small posters |
| A4 | 8.27 × 11.69 | Letters, documents, resumes, flyers |
| A5 | 5.83 × 8.27 | Notebooks, booklets, invitations |
| US Letter | 8.5 × 11 | Business documents, letters, forms (North America) |
| Legal | 8.5 × 14 | Contracts, legal documents, extended forms |
| Tabloid | 11 × 17 | Newspapers, newsletters, large brochures |
The A series is based on the ISO 216 standard and is used in most countries outside North America. Each size is half the area of the previous one, maintaining the same aspect ratio (1:√2). This makes it easy to scale documents up or down without distortion. For example, an A4 sheet can be folded in half to create an A5 sheet, and two A4 sheets side by side make an A3 sheet. This consistency is why the A series is popular for documents, books, and print projects.
The US system, used primarily in the United States and Canada, includes Letter, Legal, and Tabloid sizes. US Letter (8.5 × 11 inches) is the most common for everyday documents, while Legal (8.5 × 14 inches) is used for contracts or forms that require extra length. Tabloid (11 × 17 inches) is often used for newspapers, newsletters, or large brochures. Unlike the A series, US sizes do not follow a consistent aspect ratio, which can make scaling documents more challenging.
For envelopes, the C series (ISO) and DL (common in Europe) are widely used. A C4 envelope fits an A4 sheet unfolded, while a DL envelope fits an A4 sheet folded into thirds. In the US, envelope sizes are often referred to by their dimensions, such as #10 (4.125 × 9.5 inches) for business letters. The Paper Sizes Chart includes these envelope sizes, so you can ensure your documents fit perfectly.
If you’re working on a project that requires a specific paper size, the chart can help you select the right one. For example, if you’re designing a flyer, A4 or US Letter might be appropriate, while a poster might require A3 or Tabloid. For business cards, A8 (2.17 × 3.15 inches) or a custom size like 3.5 × 2 inches (US) is common. The tool’s reference table makes it easy to compare sizes and choose the best fit for your needs.
Troubleshooting Paper Size Mismatches
Paper size mismatches can cause frustration, especially when printing or designing documents. For example, if you create a document in A4 but print it on US Letter paper, the text or images might be cut off or misaligned. Similarly, if you’re designing a graphic for a specific paper size but use the wrong dimensions, it may not fit when printed. The Paper Sizes Chart tool helps you avoid these issues by providing exact measurements in inches, millimetres, and centimetres for all standard sizes.
One common problem is when a document is set up for one paper size but printed on another. For instance, a US Letter document printed on A4 paper will appear slightly smaller, with extra margins. To fix this, you can either adjust the document’s settings to match the paper size or resize the paper in your printer’s settings. The chart’s inch measurements make it easy to compare sizes and make these adjustments.
Another issue arises when converting between digital and print formats. For example, if you’re designing a graphic for a flyer and need to know the pixel dimensions, using the wrong DPI can result in a blurry or pixelated image. The tool’s pixel converter ensures you get the correct dimensions for your chosen resolution, if you're working at 72 DPI for web or 300 DPI for print. This eliminates guesswork and ensures your designs look sharp and professional.
If you’re working with international clients or collaborators, paper size differences can cause confusion. For example, a European client might expect an A4 document, while a US client might prefer US Letter. The chart helps you navigate these differences by providing both ISO and US sizes in inches, so you can communicate clearly and avoid misunderstandings. You can also download the chart as a PDF to share with others, ensuring everyone is on the same page.
For projects that require precise measurements, such as engineering drawings or architectural plans, the chart’s exact dimensions are invaluable. Even small discrepancies can lead to errors in construction or manufacturing, so having a reliable reference is essential. The tool’s measurements are based on official standards (ISO 216, ANSI/ASME Y14.1), so you can trust their accuracy. when you're working on a small-scale project or a large-scale design, the chart ensures your dimensions are correct.
Related guide: Convert Any Paper Size to Feet with a Free Online Chart.
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