What is a Gantt chart used for?

A Gantt chart is used to plan and track a project over time. Each task becomes a horizontal bar on a timeline, where the bar's length is the task's duration and its position shows when the work happens. Project managers use it to sequence tasks, set deadlines with milestones, surface dependencies between tasks, and report progress to a team or client at a glance.

What are the main parts of a Gantt chart?

Three parts do most of the work: a task list down the left, a time axis across the top, and a horizontal bar for each task whose length equals its duration. On top of those, milestones are zero-length markers for key dates, dependencies are links showing one task waits on another, and many charts add a progress fill or a 'today' line to track where things stand.

Who invented the Gantt chart?

The chart takes its name from Henry Gantt, an American engineer who popularised it around 1910 to 1915 to track factory work. An earlier version, the harmonogram, was created by the Polish engineer Karol Adamiecki in 1896. Adamiecki published mostly in Polish and Russian, so Gantt's version spread further and ended up giving the chart its name.

What is a good Gantt chart example?

Take a four-week website launch: discovery in week one; design starting mid-week one and running two weeks; development overlapping design from week two; content entered once design ends; testing in the final week, dependent on development; and a milestone diamond on launch day. That's the whole grammar of a Gantt chart, bars, overlaps, dependencies, and milestones, and this template's month grid reproduces it directly.

What's the difference between a Gantt chart and a Kanban board?

A Gantt chart shows when work happens: tasks sit on a timeline with durations, dependencies, and deadlines. A Kanban board shows what state work is in, moving cards through columns like To Do, In Progress, and Done, with no fixed dates. Use a Gantt for scheduled, dependency-heavy projects. Use Kanban for continuous work where priorities shift week to week.

TemplatesRoadmaps & planningGantt Chart Project Timeline

Gantt Chart in Project Management

A Gantt chart is a bar chart that lays a project's tasks out against a timeline, so you can see what starts when, what overlaps, and what waits on what. In project management it turns a task list into a schedule: each bar is a task, its length is the duration, and milestones flag the dates that matter. This board opens with a labelled month grid, eight task rows, and a short definition, ready for your own plan.

Use this template

A month-long project schedule with eight task rows mapped across every day of the month.

What's included

Project and month header. Fields for the project name and the month the schedule covers, so the chart is dated at a glance.
A built-in definition note. The 'What is a Gantt Chart?' block stays on the board for teaching, or goes for a clean plan.
A 31-day timeline grid. Columns for every day of the month, so tasks sit against real calendar dates.
Eight task rows. Pre-set rows to list activities. Add or delete rows as the plan grows or shrinks.
Editable bars and labels. Stretch a bar to set a task's duration, rename it, and recolor it by phase or owner.

Why use a Gantt chart in project management?

See the whole schedule at once. One timeline shows every task, its dates, and where work overlaps, instead of a flat to-do list.
Catch dependencies early. Laying tasks end to end shows which ones can't start until another finishes, before the order bites you.
Protect the deadline. Milestones mark the dates that matter, so slippage shows the moment a bar runs past its column.
Brief stakeholders fast. A single chart answers where the project is and what's next, without a status meeting.
Spot overbooked days. Tasks stacked on the same dates flag where one person is committed to two things at once.

How to use this template

Open the template. It lands in your Whimsical workspace as a month grid with eight task rows and a definition note.
List your tasks. Replace the placeholder rows with your real activities, one per row, in rough start order.
Set each duration. Drag a task's bar across the day columns to mark when it starts and when it ends.
Add milestones. Drop a marker on the key deadlines, like a launch date or a sign-off, so they stand out.
Color-code the work. Give each phase or owner a color so the plan reads in one glance.
Share with the team. Invite collaborators to edit and comment on the same board.

Start your project schedule

Gantt chart vs Kanban board

A Gantt chart maps tasks against a timeline, so it answers when each piece of work happens and what it depends on. A Kanban board tracks tasks by status, moving cards across columns as they progress, with no dates attached. Reach for a Gantt chart on projects with deadlines and dependencies. Reach for Kanban when work flows continuously and priorities change from one week to the next.

Frequently asked questions

A Gantt chart is used to plan and track a project over time. Each task becomes a horizontal bar on a timeline, where the bar's length is the task's duration and its position shows when the work happens. Project managers use it to sequence tasks, set deadlines with milestones, surface dependencies between tasks, and report progress to a team or client at a glance.
Three parts do most of the work: a task list down the left, a time axis across the top, and a horizontal bar for each task whose length equals its duration. On top of those, milestones are zero-length markers for key dates, dependencies are links showing one task waits on another, and many charts add a progress fill or a 'today' line to track where things stand.
The chart takes its name from Henry Gantt, an American engineer who popularised it around 1910 to 1915 to track factory work. An earlier version, the harmonogram, was created by the Polish engineer Karol Adamiecki in 1896. Adamiecki published mostly in Polish and Russian, so Gantt's version spread further and ended up giving the chart its name.

Take a four-week website launch: discovery in week one; design starting mid-week one and running two weeks; development overlapping design from week two; content entered once design ends; testing in the final week, dependent on development; and a milestone diamond on launch day. That's the whole grammar of a Gantt chart, bars, overlaps, dependencies, and milestones, and this template's month grid reproduces it directly.
A Gantt chart shows when work happens: tasks sit on a timeline with durations, dependencies, and deadlines. A Kanban board shows what state work is in, moving cards through columns like To Do, In Progress, and Done, with no fixed dates. Use a Gantt for scheduled, dependency-heavy projects. Use Kanban for continuous work where priorities shift week to week.