TL;DR

• Figures show trends and relationships; tables present exact values.

• Every figure and table needs a number, a title, and a caption.

• Format requirements vary by journal — always check the author guidelines.

• Poor visuals are a common reason editors reject papers before peer review.

• Label axes, define abbreviations, and never duplicate data across both formats.

You have finished your research. Your data is solid. But when you open a blank document and try to present your results visually, something goes wrong. The chart looks cluttered. The table has too many columns. You are not sure whether a figure or a table is even the right choice. This is one of the most common places where student researchers lose confidence, and it is entirely fixable.

Figures and tables are not decoration. They are the primary way readers absorb your results. A well-made figure can communicate a finding in seconds that would take three paragraphs of text to explain. A poorly made one forces editors to work harder than they should, and editors who work too hard tend to move on.

Understanding how to make figures and tables for a research paper is a core skill, not an afterthought. The guidance below covers the decisions, the formatting rules, and the common mistakes that separate publishable visuals from ones that hold a paper back.

When to Use a Figure and When to Use a Table

Use a figure when you want to show a pattern, trend, or relationship. Use a table when exact numbers matter and readers will need to compare specific values. These two formats serve different purposes and should never be used to present the same data twice.

A figure is the right choice when the shape of the data tells the story. If you are showing how a variable changed over time, a line graph communicates that trajectory instantly. If you are comparing proportions across groups, a bar chart or pie chart works well. If you are mapping a relationship between two continuous variables, a scatter plot is appropriate. The reader should be able to look at the figure and understand the finding without reading the surrounding text.

A table is the right choice when precision matters more than pattern. If your study measured the boiling points of five compounds under three conditions, a table lets readers extract the exact number they need. Tables are also useful for presenting demographic information, experimental parameters, or any data set where individual values carry meaning on their own.

One rule applies to both: never include a figure or table that simply repeats what your text already states in full. Each visual should add something the prose cannot efficiently provide. If you find yourself writing a paragraph that lists every number already visible in a table, cut the paragraph down to a single sentence that directs the reader to the table and highlights the key finding.

How to Make Figures for a Research Paper

A publishable figure has five elements: a figure number, a descriptive title, clearly labelled axes or components, a legend where needed, and a caption that makes the figure self-explanatory. Missing any one of these is enough for an editor to flag the submission.

Start with the figure number. Figures are numbered in the order they appear in the text, starting with Figure 1. Every figure must be cited in the body of the paper before it appears. If you reference a figure in your results section, that reference comes before the figure itself in the document.

Label every axis. The x-axis and y-axis both need a label that includes the variable name and the unit of measurement in parentheses, for example: Time (days) or Temperature (°C). Axis labels without units are one of the most common formatting errors in student submissions. If you are working with a bar chart or pie chart, label each category clearly either on the chart itself or in a legend.

Write a caption that stands alone. A reader should be able to understand a figure completely without reading the surrounding text. The caption goes below the figure. It starts with the figure number and title, then provides any context needed to interpret what is shown. Define any abbreviations used in the figure within the caption, even if you have already defined them in the text. According to the American Psychological Association (APA) Publication Manual, captions should be concise but complete enough for independent interpretation.

Use high resolution. Most journals require figures submitted as TIFF or EPS files at a minimum of 300 dots per inch (DPI) for photographs and 600 DPI for line art. Check the target journal's author guidelines before you export your files. Submitting low-resolution images is a preventable reason for desk rejection. If you are still deciding which journal to target, the guidance at How To Choose The Right Journal For Your Research Paper covers the key factors.

How to Make Tables for a Research Paper

A well-formatted table has a table number above it, a concise title, clearly labelled columns and rows, and a note section below for definitions and statistical annotations. Tables in most journals use horizontal lines only, with no vertical lines separating columns.

Number tables separately from figures. Your paper might have Figure 1 and Table 1 referring to entirely different content. Tables are also cited in order of appearance in the text, and each must be referenced before it appears in the document.

Keep columns to the minimum needed. A table with twelve columns is almost always a table that needs to be split into two, or reconsidered entirely. Each column should represent one variable or category. Each row should represent one unit of observation, whether that is a participant, a sample, a time point, or a condition. The intersection of a row and column should contain one value, not a sentence.

Use table notes for everything that does not fit in the header. Statistical significance markers such as asterisks should be defined in a note below the table. Abbreviations used in the table should be spelled out there, even if they appear in the text. APA format places notes in three categories: general notes (labelled Note.), specific notes (using superscript letters), and probability notes (using asterisks for p-values). Many science journals follow similar conventions but may differ in detail, so verify against the specific journal's style guide.

If you are preparing your first submission and want structured guidance through the full process, joining the Publication Compass waitlist gives you early access to an AI platform built to help student researchers navigate exactly these decisions.

Common Formatting Mistakes That Lead to Rejection

The most frequent figure and table errors in student submissions include missing axis labels, captions that only restate the title, inconsistent number formatting within a table, and visuals that duplicate data already presented in the text. Each of these is avoidable with a structured review before submission.

Inconsistent decimal places are a specific problem in tables. If one row shows a value as 3.4 and another shows 3.40, the inconsistency signals carelessness to reviewers. Choose a consistent number of decimal places for each column and apply it throughout. The same applies to units: do not mix milligrams and grams in the same column without a clear reason.

Colour choices matter more than most students expect. Many journals still print in black and white, and figures that rely on colour to distinguish between categories become unreadable in greyscale. Use patterns, shapes, or line styles as a secondary distinguishing feature alongside colour. If your target journal publishes online only and in colour, confirm this in the author guidelines before designing your figures around colour alone.

Plagiarism rules apply to figures too. If you reproduce a figure from another publication, even with modifications, you need written permission from the copyright holder and a citation in the caption. This applies even when the original figure appears in an open-access article. The Committee on Publication Ethics (COPE) guidelines on image integrity make clear that undisclosed reproduction or manipulation of figures is a form of research misconduct.

For a broader look at what separates a submission that gets reviewed from one that does not, the post on What Makes A Research Paper Publishable covers the full picture beyond visuals alone.

Matching Your Visuals to the Journal's Requirements

Every journal publishes author guidelines that specify figure formats, file types, resolution requirements, table formatting rules, and caption style. Reading these guidelines before you build your visuals saves significant revision time later.

The process for matching your visuals to a journal's requirements follows a clear sequence:

1. Identify your target journal and locate its author guidelines, usually found under a tab labelled "Instructions for Authors" or "Submit a Manuscript" on the journal's website.

2. Note the required file formats for figures (common options include TIFF, EPS, PDF, and PNG) and the minimum resolution for each type.

3. Check whether the journal uses APA, AMA (American Medical Association), Vancouver, or its own house style for tables and captions.

4. Confirm the journal's policy on colour figures, including whether colour printing incurs a fee for authors.

5. Review any word or panel limits for figure captions and adjust your captions before submission.

Journals that publish student research, such as the Journal of Emerging Investigators and Cureus, both provide detailed author guidelines on their websites that are worth reading even if you plan to submit elsewhere. They set clear expectations for figure quality and table structure that reflect broader publishing standards.

If you are at the stage of preparing a full submission, the step-by-step walkthrough at How To Submit A Research Paper To A Peer Reviewed Journal covers what happens after your visuals are ready.

A Practical Review Checklist Before You Submit

Before submitting any paper, run every figure and table through a short structured review. This takes less than ten minutes and catches the errors that reviewers notice first.

1. Does every figure have a number, a title, labelled axes or components, and a standalone caption?

2. Does every table have a number above it, a title, labelled columns and rows, and notes below for abbreviations and statistical markers?

3. Are all figures cited in the text in the order they appear, before each figure is shown?

4. Do all figures meet the journal's minimum resolution requirements?

5. Is the same data presented in both a figure and a table anywhere? If so, remove one.

6. Are decimal places and units consistent within each table column?

7. Are all figures readable in greyscale, or does the journal explicitly permit colour-only figures?

8. Are any reproduced figures properly credited and cleared for use?

Running through this list before you hit submit is a simple habit that meaningfully improves your chances of passing the initial editorial review.

Frequently Asked Questions

What is the difference between a figure and a table in a research paper?

A figure presents data visually, such as a graph, chart, or image, to show patterns and relationships at a glance. A table presents data in rows and columns so readers can compare exact values. Use figures when the trend matters most; use tables when precise numbers matter most. Never present the same data in both formats.

Where do figure captions go in a research paper?

Figure captions go below the figure. Table titles go above the table. This placement is standard across APA, AMA, and most journal house styles. The caption should include the figure number, a descriptive title, and enough context for the figure to be understood without reading the surrounding text.

How do I know what file format to use for figures?

Check the author guidelines for your target journal before creating your figures. Most journals accept TIFF or EPS for high-quality submission. Minimum resolution is typically 300 DPI for photographs and 600 DPI for line art. Submitting the wrong format is a common cause of delays at the submission stage.

Can a high school student publish a paper with original figures?

Yes. High school students regularly publish in peer-reviewed journals, including the Journal of Emerging Investigators, which is designed specifically for pre-university researchers. Original figures created from your own data are expected and welcomed. The standards for figure quality are the same regardless of the author's age. For a full guide to the process, see How To Publish A Research Paper As A High School Student.

How many figures and tables should a research paper have?

There is no fixed number. Each figure or table should justify its presence by showing something the text cannot communicate as efficiently. Most short research papers include between two and six visuals in total. If you find yourself creating a figure just to fill space, that figure probably does not belong in the paper.

Conclusion

Figures and tables are where your data becomes an argument. Getting them right is not about design skills. It is about clarity, consistency, and following the conventions that journals expect. Label everything. Write captions that stand alone. Match your file formats and resolution to the journal's requirements. And review every visual against a checklist before you submit.

The full publication process involves more than visuals, and every step benefits from the same level of care. Explore the rest of the Publication Compass blog for guidance on every stage, from structuring your paper to selecting the right journal and preparing your submission.