IELTS Writing Task 1: How to Describe Charts, Graphs, and Diagrams

⚡ TL;DRIELTS Academic Writing Task 1 asks you to describe visual data — a graph, chart, table, diagram, or map — in at least 150 words within 20 minutes. The key to a strong score is a clear overview that identifies the main trends, supported by specific data. Never give opinions or explanations for the data.

Last reviewed 3 July 2026.

Task 1 Visual Types

TypeWhat to Focus OnKey Language
Line GraphTrends over time, increases, decreases, fluctuationsrose, declined, fluctuated, remained stable, peaked
Bar ChartComparisons between categoriesthe highest, the lowest, twice as much, significantly more
Pie ChartProportions and sharesaccounted for, comprised, the majority, a quarter
TableSelect key data points; don’t describe every numberthe most notable, in contrast, whereas
Process DiagramSequence of stages from start to finishthe first stage, subsequently, following this, finally
MapChanges between two time periods or comparison of locationswas replaced by, was converted into, to the north of

The Ideal Structure

Introduction (1–2 sentences): Paraphrase the question. State what the visual shows, the time period, and units of measurement. Never copy the question word for word.

Overview (2–3 sentences): Identify the two or three most significant features — the overall trends, the largest/smallest values, or the most notable changes. This paragraph is essential. According to the IELTS band descriptors, a response without a clear overview cannot achieve above Band 5 for Task Achievement.

Body Paragraph 1 (3–4 sentences): Describe one group of related data with specific figures.

Body Paragraph 2 (3–4 sentences): Describe the second group of related data, making comparisons where relevant.

⚠️ Task 1 does NOT require a conclusion. The overview serves this purpose. Adding a conclusion wastes time and adds nothing to your score.

How to Describe Data Accurately

Describing trends

Use a combination of verb + adverb or adjective + noun to describe changes:

ChangeVerb + AdverbAdjective + Noun
Big increaserose sharply, surged dramaticallya sharp rise, a dramatic surge
Small increaseincreased slightly, grew marginallya slight increase, a marginal rise
Big decreasefell dramatically, plummeted sharplya dramatic fall, a sharp decline
No changeremained stable, stayed constanta period of stability
Up and downfluctuated between X and Ya period of fluctuation

Process Diagrams and Maps

Process diagrams and maps require a different approach from data charts. Use the passive voice extensively for processes (“The raw materials are transported to the factory”) and location language for maps (“To the east of the main road, a new residential area was constructed”).

For a detailed guide on map descriptions, see our Task 1 Maps guide.

Related Resources

🔑 Key Takeaways

  1. Task 1 = 20 minutes, 150+ words, describe visual data objectively.
  2. Always include an overview paragraph — it’s the single most important element.
  3. Use specific data points to support your descriptions.
  4. Vary your language: alternate between verb+adverb and adjective+noun patterns.
  5. No conclusion needed. No opinions or explanations for the data.
  6. Process diagrams use passive voice; maps use location language.