How to Write About Pie Charts in IELTS Task 1 (With Examples)

Pie charts show how a whole is divided into parts, making them one of the more straightforward visual types in IELTS Writing Task 1. However, many candidates still score below their potential because they struggle with proportion language, fail to make meaningful comparisons, or simply describe each slice in order without any analysis.

This guide teaches you the specific skills needed to describe pie charts effectively and earn a score of or above.

What Makes Pie Charts Different

Unlike line graphs or bar charts, pie charts always represent parts of a whole — typically 100%. This means your language should focus on proportions, percentages, and fractions rather than quantities or trends.

You may encounter:

• A single pie chart — showing the breakdown of one category
• Two or more pie charts — comparing the same breakdown across different times, places, or groups

When there are multiple pie charts, comparison becomes the most important skill. The examiner wants to see that you can identify and articulate the differences and similarities between them.

Step-by-Step Method

Step 1: Identify Key Features (2 Minutes)

Before writing, note:

• The largest and smallest segments in each pie chart
• Any segments that are roughly equal
• If there are multiple charts, which segments grew, shrank, or stayed the same
• The total always equals 100% — use this to check your understanding

Step 2: Write the Introduction

Paraphrase the question. For pie charts, common paraphrasing includes:

• "shows" → "illustrates" / "depicts" / "presents"
• "the proportion of" → "the percentage of" / "the share of"
• "in five categories" → "across five different sectors"

Example: "The pie charts illustrate the percentage of total energy generated from five sources in Country X in 2000 and 2020."

Step 3: Write the Overview

Summarise the two or three biggest patterns. For pie charts, the overview often covers:

• Which segment is dominant (and whether this changes between charts)
• The general direction of change (if comparing multiple charts)
• Any dramatic shifts or notable stability

Example: "Overall, fossil fuels accounted for the majority of energy production in both years, although their share decreased significantly between 2000 and 2020. Renewable sources, particularly solar, saw the most notable growth."

Step 4: Write Body Paragraphs

Grouping strategies for pie charts:

• Largest to smallest — Describe dominant segments first, then minor ones
• By change — Group segments that increased together, then those that decreased
• By chart — Describe one pie chart per paragraph (works well with two charts)

For a single pie chart, two body paragraphs organized by size (larger segments, then smaller segments) works well.

For two pie charts, you can either describe one chart per paragraph with comparisons woven in, or group by trend (segments that grew vs. segments that shrank).

Proportion and Percentage Language

Mastering this vocabulary is essential for pie chart descriptions:

Expressing Large Proportions

• "X accounted for the largest share, at 45%."
• "The vast majority of the total (72%) was attributed to X."
• "X made up nearly three-quarters of the whole."
• "X constituted the dominant/predominant category."

Expressing Small Proportions

• "X represented a mere 3% of the total."
• "Only a tiny fraction was devoted to X."
• "X accounted for the smallest proportion, at just 5%."
• "The share of X was negligible/insignificant."

Expressing Approximate Values

• "roughly/approximately/about a third"
• "just over/under a quarter"
• "slightly more/less than half"
• "exactly/precisely 40%"

Expressing Change Between Pie Charts

• "The proportion of X rose from 20% to 35%."
• "X's share of the total nearly doubled, increasing from 15% to 28%."
• "The percentage of X declined by 10 percentage points."
• "While X shrank considerably, Y expanded to fill the gap."

Sample Answer: Two Pie Charts

Task: The pie charts show the main sources of energy in Country Z in 1990 and 2020.

Introduction: The two pie charts compare the distribution of energy sources in Country Z between 1990 and 2020.

Overview: Overall, the country's energy mix shifted substantially over the thirty-year period. Oil and coal, which together dominated energy production in 1990, saw their combined share decrease markedly, while natural gas and renewable sources gained significantly greater prominence by 2020.

Body Paragraph 1: In 1990, oil was the single largest energy source, accounting for 42% of total production. Coal held the second-largest share at 30%, meaning that these two fossil fuels together comprised nearly three-quarters of the country's energy supply. Natural gas contributed 18%, while nuclear energy and renewables made up the remaining 10%, with renewables representing a mere 3%.

Body Paragraph 2: By 2020, the picture had changed considerably. Oil's share fell to 28%, and coal experienced an even steeper decline to just 16%. In contrast, natural gas expanded to 27%, becoming almost equal to oil as an energy source. The most striking change, however, was in renewable energy, which surged from 3% to 18%, making it the third-largest source overall. Nuclear energy also grew modestly, rising from 7% to 11%.

This response works because it:

• Groups data logically rather than listing every segment in order
• Makes direct comparisons between the two time periods
• Highlights the most significant changes in the overview
• Uses varied proportion language throughout

Single Pie Chart Strategy

With only one pie chart, you have less data to work with, so your analytical skills become even more important. Focus on:

1. Ranking — Clearly identify the hierarchy from largest to smallest
2. Grouping — Point out segments that are similar in size
3. Contrast — Highlight the gap between the largest and smallest segments
4. Combining — "X and Y together accounted for over 60% of the total"

Common Mistakes to Avoid

1. Describing slices clockwise — This is not analysis; it is listing. Group and compare instead.
2. Forgetting to paraphrase — Using "the pie chart shows" copied directly from the question wastes an opportunity to demonstrate vocabulary.
3. Imprecise language — "A lot of people chose X" is too vague. Always include approximate or exact percentages.
4. Confusing percentage change with percentage point change — A rise from 10% to 20% is a 10 percentage point increase (or a 100% increase). Be precise.
5. Writing an opinion — As with all Task 1 questions, you are reporting data, not offering your views.

Practice Recommendations

Pie charts reward candidates who have strong proportion vocabulary and comparison skills. To practise:

• Generate pie chart tasks using CambPrep's writing practice and aim to complete each one in under 20 minutes
• After writing, check that you have used at least three different ways to express proportions
• Read your overview and ask: "Does this capture the most important information without any numbers?" If not, revise it
• Track your band score progress over time on your dashboard

If you want to practise pie charts alongside other Task 1 question types in a realistic timed setting, try our exam simulator.

Frequently Asked Questions

How many words should I write for a pie chart description?

Aim for 170-190 words. The minimum is 150 words, but slightly exceeding this ensures you have covered enough detail. Going beyond 200 words typically means you are including unnecessary description.

What if the pie chart has very many small segments?

Group the small segments together. For example, write "The remaining four categories each accounted for less than 5%, collectively representing approximately 15% of the total." This is more efficient and analytical than describing each tiny segment separately.

Should I describe the pie charts separately or compare them together?

The strongest approach is to weave comparisons throughout your body paragraphs. However, if you find this difficult, describing one chart per paragraph with a comparison sentence at the end of each is an acceptable alternative structure.

Is it acceptable to use a table-like format or bullet points?

No. All IELTS Writing responses must be written in connected prose with full paragraphs. Using lists, tables, or bullet points will significantly lower your score. Present your data analysis in flowing, well-connected sentences.