IELTS Task 1 Checker with Chart: Why Figures Must Match

Academic Writing Task 1 asks you to summarise visual information in your own words. The public Writing band descriptors place that job under Task Achievement. A fluent report can still miss the chart: the wrong year, the wrong unit, a rise written where the line falls, or an overview that describes a different pattern from the one in front of you. This guide covers that check. It uses the published descriptors, then the form on the IELTS Writing Task 1 checker.

The submission form takes the report as text. It also has an optional question box for the task wording, and a task-type control. The Task 1 page opens with Task 1 already selected. There is no control on that form for attaching a chart image. If the figures live only on the visual, you are the person who can see them. The rest of this page is the routine for doing that before you paste.

What Task Achievement says about a wrong figure

IELTS publishes the Writing band descriptors. For Academic Task 1, Task Achievement is the criterion that covers the chart.

At Band 6, the descriptors say the response addresses the requirements of the task and presents an overview with information appropriately selected. They also say the writer presents and adequately highlights key features, while details may be irrelevant, inappropriate, or inaccurate. Inaccurate is the word that covers a number, a date, a unit, or a direction of change the chart does not show. The paragraph can be easy to read and still sit with that description.

At Band 7, the response covers the requirements of the task. It presents a clear overview of the main trends, differences, or stages. It clearly presents and highlights key features, even where those features could be extended further. A clear sentence that names the wrong highest value is not a clear overview of the chart the reader can see. The language can be controlled, and Task Achievement can still remain with the Band 6 description because the details are inaccurate.

At Band 5, the descriptors describe detail recounted mechanically, with no clear overview, and they allow for a description that has no data supporting it. There may also be a tendency to focus on details. Listing every cell is a coverage problem. Choosing a feature and then writing a number the chart does not contain is an accuracy problem. Both belong to Task Achievement.

At Band 8, the response covers the requirements of the task sufficiently and presents, highlights, and illustrates key features clearly and appropriately. Illustration still has to be this chart. A precise comparison of two values that are not on the visual is not appropriate detail, however neat the sentence is.

The other three criteria apply to the same sentences. Coherence and Cohesion covers grouping and the order of information. Lexical Resource covers the words you choose for change and amount. Grammatical Range and Accuracy covers whether those sentences stay under control. “Rose by” and “rose to” are grammar and word choice, and they also change the figure. If a line moves from 20 to 28, “rose by 8” and “rose to 28” can both match the chart. “Rose by 28” does not. Correct the number, then vary the sentence. The band descriptors guide keeps the four criteria side by side. This article stays on the data check that Task Achievement names.

The overview is a claim about this chart

The Band 7 descriptor asks for a clear overview of the main trends, differences, or stages. That sentence is a claim about the visual as a whole. It is a poor place to store every figure, and it is the first place a wrong generalisation shows.

For a line graph, the overview usually names the overall direction and the category that stayed highest or changed the most. For a bar chart, it usually names the largest group and the clearest contrast. For a table, it usually names the standout row and the main change between the times shown. For a process, it names how many stages there are and whether the process cycles. For a map, it names the main change in use or location. The Task 1 guide separates that overview from the body paragraphs that carry key features and comparisons.

Each of those sentences can sound like an overview and still miss the chart. “Overall, all categories increased” has the shape of an overview, and it is inaccurate when one category fell. “Overall, there were many changes” avoids a wrong number and also avoids the main trend. Band 6 asks for an overview with information appropriately selected. A sentence that could fit any chart has not selected the information on this one.

Write the overview after the facts are marked, and place it where a reader meets it early, usually after one opening sentence that names the visual and the unit. Keep the selected figures in the body, where you can check them one by one. The Task 1 common mistakes guide treats a missing overview as a frequent failure. An overview can also be present, well placed, and still wrong when the trend it announces is a different trend from the one on the chart.

Key features are a short list, and each one has to be true

Band 6 and Band 7 both ask you to present and highlight key features. Band 7 asks for that highlighting to be clear. Band 6 adds that details may be inaccurate. Choosing a feature does not relax the accuracy rule. It concentrates the rule on the sentences a reader will treat as the point of the report.

A workable selection for most charts is small:

• the highest and lowest points you are willing to name
• the largest change
• the exception to the general pattern
• any crossing, where one category passes another

If you cannot put a finger on that bar, cell, or point, it is not a key feature of this chart. Delete the sentence or correct the number. The Band 7 Task 1 sample shows an overview carried by a small set of comparisons. Mark every number when you read it, then use the same mark-up on your own chart.

A comparison is a second calculation

“Higher”, “lower”, “the largest”, “double”, “half”, “three times”, and “the gap widened” are claims about two numbers. They are also the sentences where a Task 1 report does the comparing the task asks for. The Task 1 checker page describes a common weakness as data that is listed and never compared. A comparison built on the wrong pair is a different weakness, and the Band 6 descriptor still calls inaccurate detail by its name.

Do the arithmetic on the question paper. If you will not divide the two values, write both values and say which is higher. “Doubled” and “halved” need a multiplication you can show in the margin. A result that is close is still a different number. “The gap widened” needs the difference at the start and the difference at the end. If the second difference is smaller, the gap narrowed.

Units belong in the same pass. A title that says percentages is a different title from one that says millions, and a move from 20% to 28% is eight percentage points. That is a different claim from “rose by 8%” unless you have converted the unit on purpose and said so. Keep the unit printed on the chart, and repeat it whenever a later sentence could be read as a different measure.

Data mistakes that still look like a finished report

These are the errors that survive a tidy paragraph. None of them is fixed by a synonym.

• A swapped endpoint. The first year is copied into the sentence about the last year, or two categories exchange their figures. The grammar is fine. The chart is not.
• A universal word. “All”, “every”, “only”, “the same”, and “the most” fail when one category is the exception. One falling line makes “all categories increased” inaccurate under the Band 6 wording.
• A comparison that was never calculated. “Double”, “half”, and “the gap widened” are the usual ones. The sentence sounds analytical because it compares, and the sum was skipped.
• A unit that drifted. The axis says thousands of tonnes and a later sentence says thousands of people, or a percentage is later treated as a share of a different whole.
• A figure from the other visual. On a mixed task, a sentence about the pie chart uses a number from the table. Name the visual in the sentence so the later check has a source.
• A map or process detail with no source. A building on the wrong side of a road, a feature the key marks as removed, a compass point that fights the arrow, a stage out of order, or a material the diagram never names. The descriptor’s word is still inaccurate detail. The source is the key and the arrows.
• A report under the task length. Academic Task 1 asks for at least 150 words. The form will run a diagnosis from 50 words, and the scoring instructions tell it to treat a response under 150 words as limited on Task Achievement.

A self-check to finish on the question paper

Run this on the chart before you open the checker. It uses the visual you can see. The form does not receive that visual as an image.

1. Read the title, the axes or column headings, and the key. Put that unit into the first sentence, in the words the chart uses.
2. For each series you will mention, mark the first and last value. Compare them with the first and last value in the paragraph.
3. Mark the highest and lowest points you named. If a finger cannot find them, correct the sentence.
4. Underline every universal word and test it against the category most likely to be the exception.
5. Circle every computed comparison: double, half, the largest rise, a wider gap. Redo that sum in the margin.
6. Revise the overview only after those marks exist. Name the main trends, differences, or stages. Leave the marked numbers for the body.
7. Read the body against the marks, one number at a time, then count the words and bring the report to at least 150.

The order matters. A comment on grammar can make a wrong figure sound more fluent. The figure check comes first.

A practice chart, used only as a checking exercise

The figures below were written for this article. They are a practice chart, not an official IELTS task, and not a result from any candidate. Imagine the share of electricity from three sources in one country.

A weak overview says: “Overall, every source increased, and renewables doubled to 25%.” The unit is percent, which the sentence keeps. “Every source” fails because coal moves from 50% to 22%. Renewables do move from 20% in 2000 to 40% in 2020, so “doubled” can describe the whole period, and “to 25%” cannot: 25% is the 2010 figure. In 2020 renewables are the largest share, at 40%, with gas at 38% and coal at 22%. Coal also shows the largest change, a fall of 28 percentage points, against a rise of 8 points for gas and 20 points for renewables.

A faithful overview can say that coal’s share fell, gas rose, and renewables rose to become the largest source by 2020. The body can then give the checked pairs: coal from 50% to 22%, gas from 30% to 38%, and renewables from 20% to 40%. Each number can be pointed at on the table. That is the standard to meet before you paste. A band also depends on coherence, vocabulary, and grammar across the whole response.

How to use the checker once the figures match

Open the Task 1 checker and paste the report into the essay box. The page starts with IELTS Writing Task 1 selected. On this form the task-type control is labelled “Task type & target band (optional)”, and leaving that panel closed still submits the report as Task 1. The submit button stays off until the paste reaches 50 words. For a report you would take into the exam, stay at or above 150 words.

The question box is optional. Paste the task sentence if you have it: the line that says what the chart shows and that you should summarise the information and make comparisons. That box is text. It does not receive a picture of the chart. On many tasks the figures exist only on the visual, so the question sentence does not contain them. The checker is instructed not to invent chart numbers or trends that the essay or the prompt do not support, and to base the feedback on the essay when the data is missing. A wrong figure that is consistent inside your own paragraph can therefore go unchallenged, because the chart was never attached. The paper check is the step that closes that gap.

The main IELTS Writing Checker uses the same kind of form and defaults to Task 2. Open “Task type & target band (optional)” and choose IELTS Writing Task 1 before you submit a chart report there. The Task 1 page is the direct path.

The free diagnosis shows an estimated band direction, the weakest criterion, and the main reason this draft is held back. The methodology page states the limit: the product is a diagnostic and revision tool, the estimate is for deciding what to revise, and only an official IELTS test assigns an examined band. The site is not affiliated with IELTS, the British Council, IDP, or Cambridge English. The Task 1 checker page states that eligible new visitors can use one free diagnosis without creating an account. Further checks depend on the allowance on the account.

What to revise after the diagnosis

Read the weakest criterion against the chart, and keep the checked figures frozen while you revise that criterion.

When the weakest criterion is Task Achievement, return to the overview and to every figure you kept. The methodology page says the tool looks for repeated patterns such as a missing overview. A missing overview and an overview of the wrong trend are different jobs. Confirm the figures, then rewrite the overview so it names the main trends, differences, or stages you have already checked.

When the weakest criterion is Lexical Resource, leave every number as it is and replace repeated trend verbs with words that still mean the same change. A large fall and a small rise do not share an adverb. The chart decides which one is available. When the weakest criterion is Grammatical Range and Accuracy, repair the comparison sentences. That is where a slip changes a number: by and to, than, while, whereas. When the weakest criterion is Coherence and Cohesion, put the overview where the reader meets it early, group the categories that move together, and give the exception its own sentence.

The Task 1 checker guide goes further into overview, comparison, and repeated trend language. After that revision, submit the same chart’s report again. Change the criterion you were given, and leave the checked figures untouched. The methodology page asks you to compare more than one piece of writing before you treat a single estimate as a prediction. For Task 1, the second piece can be the same visual. A new chart you have not checked teaches you less about the figures on this one.

Keep the chart beside the screen until the report and the visual agree. The checker can then diagnose the text you confirmed.