IELTS Flow-Chart & Diagram Labelling: method, traps and practice
A process is drawn for you — a flow-chart of stages or a labelled diagram of a mechanism — and you complete the missing labels from the text or recording. The picture is a gift: it is a ready-made summary of the process, and the arrows tell you the order in which the answers will arrive.
How Flow-Chart & Diagram Labelling is scored
One mark per label, under the usual completion rules: stay inside the word limit or score zero, spell exactly as the source spells, hyphenated words count as one, ALL CAPS is fine. Labels are usually words lifted straight from the passage or audio, and the flow of the chart follows the flow of the source — so the diagram itself is a navigation device, not just a question. In Reading you can jump freely within the 60 minutes; in Listening the audio plays once and the arrows are your pacing guide.
The rules that outrank technique: word limits are absolute — an over-limit answer scores zero even when the content is right — hyphenated words count as one word, ALL CAPS is officially fine, and both US and UK spellings are accepted (misspellings of either are not). The full set, sourced and dated, is in the IELTS answer rules.
A three-step method that survives the clock
- Step 1. Study the diagram before the source: read its title, follow the arrows, and say the process to yourself with gaps ("water enters here, then ___ happens, then it is stored in the ___"). Now you know exactly what you are hunting.
- Step 2. Find the process description in the text — it is usually concentrated in one or two paragraphs — or track it in the audio, and move through it stage by stage in step with the chart.
- Step 3. Lift the label words exactly as the source gives them, checking each against the gap's grammar and the word limit. A label that does not fit the sentence built around the gap is the wrong label.
The traps that cost the most marks
- Labelling from your own knowledge of how the process "should" work. The diagram is completed from the source; a technically true label the text never states is a wrong answer.
- Ignoring the arrows and hunting each gap independently — the chart's order mirrors the source's order, and using it turns eight searches into one guided read.
- Word-limit bloat on technical terms: if the text says "cooling chamber", writing "the large cooling chamber" can burst the limit and score zero.
See the method on a fresh question
Prompt: A passage describes small-scale paper recycling: collected paper is shredded, mixed with water into a pulp, screened to remove staples and plastic, pressed into sheets, and air-dried. The flow-chart shows five boxes with two gaps: "shredded → mixed into ___ → screened → pressed into sheets → ___". (No more than two words.)
Approach: Walk the arrows against the text. Stage two: the paper is "mixed with water into a pulp" — the gap after "mixed into" takes "pulp" (or "a pulp", still inside two words). The final box matches "air-dried": the chart wants the last stage, so "air-dried" — one hyphenated word, counting as one. Notice what you never needed: any knowledge of recycling. The chart plus the paragraph contain the entire answer key.
This example is original to TestDayTwin — no genuine IELTS test question appears here.
Drill Flow-Chart & Diagram Labelling free
Our IELTS practice runs in a replica of the computer-delivered screens with instant scoring — timed passages with free navigation in Reading, once-only audio in Listening.
Questions learners ask
Are flow-chart answers in order in the passage?
Effectively yes — the chart follows the process, and the source describes the process in sequence, so completed and gapped stages alternate along the same path. Anchor yourself on the stages that are already labelled: the answer to a gap sits between its neighbours' locations in the text.
Do I need technical knowledge for diagram labelling?
None — and using it is the classic mistake. Every label comes from the passage or recording; a label that is scientifically correct but absent from the source scores nothing. Treat the diagram as a summary of the text with holes in it, not as a general-knowledge quiz.
Is diagram labelling the same as map labelling?
No — maps and plans are a distinct Listening type with their own skill set (compass directions, following a spoken route), and they have their own guide on this site. Flow-charts and diagrams test process-following instead: stages, mechanisms and the order in which things happen.
What word limit applies to flow-chart completion?
Whatever the instructions state for that set — commonly "no more than two words and/or a number", sometimes one word only. The limit is absolute: over-limit answers score zero even when the content is right, and a hyphenated term like "air-dried" counts as a single word.
Related IELTS question-type guides
Question-type behaviour, section structure and answer rules follow official IELTS guidance as verified for our IELTS format guide andanswer-rules guide (July 2026, computer-delivered test). TestDayTwin is an independent practice site.