AMCAS Character Counter

AMCAS Personal Comments Essay Character Limit

The AMCAS Personal Comments Essay has a maximum length of 5,300 characters, including spaces . In our September 2026 testing in the official AMCAS applicant portal, the Personal Comments Essay field enforced a 5,300-character live-entry limit.

The Personal Comments Essay is sent to all medical schools you apply to through AMCAS. The AAMC recommends carefully proofreading your essay before submitting because you cannot make changes to it after your AMCAS application is submitted.

View the official AAMC Personal Comments Essay guidance

AMCAS Character Limits

AMCAS uses different character limits for several important application sections. Choose the corresponding section in the counter above to automatically use the appropriate limit.

AMCAS allows applicants to enter up to 15 Work/Activities experiences. Each experience has a 700-character description. Applicants may designate up to three experiences as Most Meaningful and receive an additional 1,325 characters for each designated experience.

The MD-PhD and Significant Research Experience essays apply to applicants applying to combined MD-PhD programs.

View the official AAMC Work/Activities guidance

AMCAS Characters to Watch Out For

Some characters that look perfectly normal in a document may not behave the way you expect when pasted into AMCAS. In our testing, certain characters were counted while editing but disappeared after the field was saved, while the pipe character | was explicitly rejected.

The following are some of the characters most worth checking before submitting your application.

Pipe character: |

The ordinary pipe character was explicitly rejected by AMCAS in our testing. AMCAS displayed an error stating that the field could not contain the pipe character.

Use another punctuation mark or rewrite the sentence instead.

Greek letters: β μ π Δ

Tested Greek letters disappeared after saving. This can be especially important in scientific, medical, and research descriptions.

For example, β-blocker became -blocker, and Greek μg became g.

One particularly surprising result was that the Greek letter μ disappeared, while the visually similar micro sign µ was preserved in our testing.

Subscripts: ₂ ₃ and similar characters

Unicode subscripts disappeared after saving. Applicants describing chemistry, research, or scientific measurements should pay particular attention to subscripts copied from websites, PDFs, or word-processing documents.

For example, CO₂ became CO, and H₂O became HO.

Mathematical symbols: ≤ ≥ ≠ ≈ ∞ √

Several common mathematical symbols disappeared after saving.

For example, p≤0.05 became p0.05. That type of change can alter the meaning of a research or statistics statement.

PDF ligatures: fi fl ffi

Text copied from a PDF can contain special ligature characters that look almost identical to ordinary letters. These are particularly easy to miss because the original text may look completely normal.

In our testing, the ligatures disappeared instead of being converted to their normal-letter equivalents.

• office became ofce.
• flower became ower.
• efficient became ecient.

Invisible characters

Copied text can contain invisible Unicode characters such as zero-width spaces and formatting marks. These characters may count while you are editing but disappear when AMCAS saves the field.

Because you cannot normally see them, the compatibility checker above identifies these characters by name and Unicode code point when possible. If you need additional help finding hidden characters in your text, use our Invisible Character Detector to locate zero-width spaces, formatting marks, and other invisible characters before pasting your text into AMCAS.

Some accented and extended Latin letters

Many common accented Western characters such as é, ñ, ü, ç, and ø were preserved in our testing. However, some less common Latin-script letters disappeared.

Examples included:

• Dvořák becoming Dvoák.
• Łukasz becoming ukasz.

This can matter for names of people, institutions, locations, publications, or research collaborators.

Emoji and decorative Unicode symbols

Emoji and many decorative Unicode symbols also disappeared in our testing. These are generally less likely to appear in a medical school essay, but they can sometimes be introduced when text is copied from another application, website, or document.

The safest approach: review any compatibility warning from this tool, then save your response in AMCAS and proofread the saved version before submitting.

AMCAS Personal Comments Essay Formatting

• Do not exceed 5,300 characters including spaces.
• AMCAS does not permit paragraph indentation.
• You may use an extra space between paragraphs to make paragraph breaks easier to read.
• AAMC recommends typing your essay directly into AMCAS when possible.
• If you copy and paste your essay, use plain text when possible.
• Save the field in AMCAS and proofread the saved version before submitting.

AAMC warns that copying formatted text into the AMCAS application can cause formatting problems. Our portal testing also found that some pasted Unicode characters can be counted while editing but disappear after the field is saved.

If you are working with text outside of AMCAS and simply need to check its length, you can also use our free online character counter to count characters and words for other types of text.

AMCAS Character Compatibility Check

This tool does more than count characters. As you type or paste text, it checks for characters that may cause problems when the text is transferred to AMCAS.

The compatibility warning above distinguishes between confirmed problems and characters whose behavior has not been confirmed.

• Confirmed AMCAS compatibility problem: characters that disappeared or were trimmed after saving during our AMCAS testing.
• Rejected by AMCAS: characters for which AMCAS displayed a validation error during our testing.
• Not confirmed in our AMCAS testing: characters that we have not confirmed as safely preserved.

Confirmed problems and rejected characters are shown as stronger warnings. Characters that have not been confirmed are shown as cautionary warnings so you can review them without assuming that AMCAS will definitely remove them.

A character being removed after save is not the same as being rejected. In many of our tests, AMCAS accepted the text, successfully saved the field, and only then silently removed the unsupported character.

No compatibility warning can replace checking your actual application. Always inspect the text after saving it in AMCAS.

Characters and Text in AMCAS

AAMC recommends using English (United States) characters in AMCAS text responses because other characters may not be accurately recognized.

We tested character behavior directly in the official AMCAS Personal Comments Essay field in September 2026. One of the most important findings was that AMCAS can count a character while you are editing, allow the field to save, and then silently remove that character on save .

This can change actual text rather than simply changing its character count. For example, during our testing a PDF-style fi ligature disappeared rather than becoming fi, CO₂ became CO, and p≤0.05 became p0.05.

Preserved after save

Common keyboard characters and many common Western characters were preserved in our testing. Tested examples included:

• Standard English letters and numbers.
• Ordinary internal spaces, tabs, line breaks, and blank lines.
• Standard ASCII punctuation such as ! " # $ % & ' ( ) * + , - . / : ; < = > ? @ [ \ ] ^ _ ` { } ~ .
• Common typography such as “ ” ‘ ’ – — … • ·.
• Many common Western accented letters such as é ñ ü ç ø å æ œ ß Š Ž.
• Common symbols including © ® ™ € £ ¥ ¢ ± × ÷ § ¶ † ‡ ° µ ‰.

Confirmed removed after save

Other characters were included in the live AMCAS count but silently disappeared when the field was saved. Tested examples included:

• Emoji and many decorative Unicode symbols.
• Greek letters such as α β μ π Δ.
• Combining accent marks.
• PDF ligatures such as fi fl ffi.
• Unicode subscripts such as ₂.
• Many mathematical characters including tested examples such as ≤ ≥ ≠ ≈ ∞ √.
• Many special Unicode spaces and invisible formatting characters.
• Fullwidth letters, numbers, and punctuation.
• Many punctuation lookalikes and Unicode compatibility characters.

Explicitly rejected

Silent removal is different from an explicit validation error. In our testing, the ordinary pipe character | was explicitly blocked by AMCAS with the message:

“This field cannot contain the pipe (|) character.”

Combining characters

Visually identical text can behave differently depending on how the character is encoded. For example, the single precomposed character é was preserved, while an e followed by a separate combining acute accent saved as plain e.

Scientific and medical text

Applicants should be especially careful with scientific notation copied from research papers, PDFs, websites, or word-processing documents. Characters such as Greek letters, Unicode subscripts, mathematical operators, and ligatures can alter the meaning of text if they disappear.

For example:

• CO₂ became CO.
• β-blocker became -blocker.
• Greek μg became g, while the separate micro sign µg was preserved.
• p≤0.05 became p0.05.

PDF ligatures

Text copied from PDFs can contain special ligature characters that look like normal letter combinations. In our tests, those ligatures were deleted rather than expanded into ordinary letters.

• office became ofce.
• flower became ower.
• efficient became ecient.

Names and accented letters

Many common Western accented characters were preserved, but not every Latin-script character was. In our testing, some names therefore changed when particular letters were removed.

• Dvořák became Dvoák.
• Łukasz became ukasz.
• Çağla became Çala.
• Michał became Micha.

Whitespace behavior

Internal ordinary spaces, repeated spaces, tabs, line breaks, and blank lines were preserved during our testing.

Whitespace at the very beginning or end of the field behaved differently. AMCAS trimmed tested leading and trailing ordinary spaces, tabs, line breaks, non-breaking spaces, and narrow non-breaking spaces when the field was saved.

To avoid distracting warnings during normal writing, the counter does not warn about a temporary trailing space while you are actively typing. Edge whitespace can instead be checked after you finish editing or when you copy the response.

Practical takeaway: stay within the live AMCAS character limit, review any compatibility warning shown by this tool, and always proofread the version that remains after you save the field in AMCAS.

How the AMCAS Character Counter Works

Select the AMCAS section you are working on from the dropdown above. The counter automatically changes to the appropriate character limit for that section.

The Characters total shows the live length of your text, while Remaining shows how much space you have left before reaching the selected AMCAS limit. For general text that does not need an AMCAS-specific limit, use our character counter.

The character count uses JavaScript string length. During our direct testing of the AMCAS Personal Comments Essay field, this matched the AMCAS live character count, including characters that AMCAS later removed when the field was saved.

The compatibility checker separately examines the characters in your text. If it finds something confirmed to cause a problem or something that has not been confirmed as preserved, a warning appears below the Copy and Clear buttons.

The counter runs automatically in your browser as you type. Your application text does not need to be submitted to CharacterCounter.com in order to calculate its length or perform the compatibility check.

What Should You Write About in the AMCAS Personal Comments Essay?

AAMC provides several questions applicants may consider while preparing the Personal Comments Essay, including why they selected medicine, what motivates them to learn more about medicine, and what they want medical schools to know that has not already been explained elsewhere in the application.

Applicants may also choose to discuss significant hardships, challenges, obstacles, or fluctuations in their academic record when those experiences provide useful context.

The essay should ultimately help medical schools understand your reasons for pursuing medicine and provide relevant personal context that is not already clear from the rest of your application.

AMCAS Work and Activities Character Limits

The AMCAS Work/Activities section allows you to describe employment, clinical experiences, research, volunteering, extracurricular activities, awards, publications, and other experiences you want medical schools to consider.

Each Work/Activities experience description is limited to 700 characters. You may enter up to 15 experiences.

Up to three experiences may be designated as Most Meaningful. For each designated experience, AMCAS provides an additional 1,325 characters to explain why the experience was especially meaningful.

Medical schools receive Work/Activities descriptions as plain text, so formatting such as bold text, italics, indented paragraphs, and bulleted lists will not appear to reviewers.

View the official AAMC Most Meaningful Experience guidance

AMCAS MD-PhD Essay Character Limits

Applicants applying to combined MD-PhD programs must complete two additional essays.

• MD-PhD Essay: 3,000 characters including spaces.
• Significant Research Experience Essay: 10,000 characters including spaces.

The MD-PhD Essay explains your reasons for pursuing the combined degree. The Significant Research Experience Essay provides additional detail about your research experience and contributions.

View the official AAMC MD-PhD Essay guidance

How to Use the AMCAS Character Counter

1. Choose the AMCAS section you are working on from the dropdown above.
2. Type or paste your text into the text box.
3. Check the Characters count to see the current length.
4. Check Remaining to see how much space you have left.
5. If a compatibility warning appears, review the listed characters.
6. Pay particular attention to red warnings for confirmed AMCAS problems.
7. Review yellow caution warnings for characters whose behavior has not been confirmed.
8. Click Copy Text when you are ready to transfer the response into AMCAS.
9. Save the response in AMCAS.
10. Proofread the saved version to make sure no characters disappeared.

For other writing that does not use an AMCAS character limit, CharacterCounter.com also offers a general character counting tool for quickly checking the length of text.