How to make a bar chart that people understand at a glance

28 October 2026 · 2 min read

A chart on a slide gets a few seconds of attention. In that time it should say one thing clearly. Here's how to make a bar chart that does, and how to build it in a couple of minutes.

Bars, lines or a pie?

Bars compare amounts: sales by region, votes by option, hours by task.
Lines show change over time: monthly visitors, a price over a year.
A pie or donut shows parts of one whole, like where a budget goes. It reads well with up to five or six slices. More than that, use bars.

If you're unsure, choose bars. People compare lengths far more accurately than angles or areas.

Build it

Open the chart maker and press Make a chart. A slide opens with a sample bar chart.
Press Data. Type your labels down the left and your numbers across. Enter moves to the next row.
Comparing two years or two groups? Add a second series with + Series. Each series gets its own colour and the legend appears by itself.
Switch to a line, pie or donut at the start of the bar if your data calls for it. The numbers stay.

Make it readable

Order the bars. Unless the labels have a natural order, such as months, sort from largest to smallest. The eye reads the ranking straight away.

Start at zero. A bar's length is its value; cut the axis and a small difference looks huge. Pozzly's axis always includes zero and counts in round steps.

Label directly. Turn on Values to write each number on its bar. Then the reader doesn't have to trace across to the axis.

One colour, plus one. Make every bar the same calm colour, and the one you want people to notice a strong one. In Colours, pick a grey for the series and your brand colour for the highlight, or split the highlight into a series of its own.

Say the point in the title. "Sales rose 30% in Q4" beats "Quarterly sales". Write it as a heading above the chart.

Size the type for the room

Labels on a slide shown in a meeting room need to be bigger than you think. Raise the chart's font size until the smallest label is readable from the back of the room; for a post on a phone, the same rule applies at arm's length.