This guide skips the project-manager jargon: how to read a Gantt chart, when it beats a kanban board (and when it doesn't), and how to build your own online for free in 4 steps — without touching a single formula.
What is a Gantt chart? The plain-English version
It's a view of your project with time on the horizontal axis and tasks in rows. Each task is drawn as a bar running from its start date to its end date. If two bars overlap, those tasks happen at the same time; if one starts right where another ends, it's because it depends on it. That's the whole idea — everything else is detail layered on top.
The point of a Gantt chart isn't that it looks professional. It's that it makes visible two things a task list hides: how long each thing takes, and what blocks what. That's why it's the go-to view for projects with real deadlines — campaigns, events, construction jobs, product launches.
How to read a Gantt chart in 30 seconds
Bars = duration
Each bar is a task. Where it starts and ends are its dates; its length is how much continuous work it represents. A suspiciously long bar is usually a task that should have been split into several.
Overlaps = parallel work
Bars that overlap are tasks moving at the same time. Great for spotting weeks where one person has three bars stacked on them — that's a bottleneck waiting to happen.
Dependencies = the real order
Arrows between bars mark what can't start until something else finishes: design before production, approval before publishing. When a task with dependents slips, it drags everything waiting on it.
Milestones = the moments that matter
Milestones are points with no duration: the client delivery, event day, end-of-month cutoff. They act as anchors — everything else arranges itself around them.
Gantt chart vs. project schedule: same thing?
Almost. In everyday use the terms blur together. Strictly speaking, the schedule is the plan — the list of activities with dates and owners — and the Gantt chart is one way to draw that plan, using bars. The same schedule can also be shown as a calendar or a kanban board. If what you actually need is to build the plan from scratch (define activities, estimate durations, assign owners), start with our guide on how to make an activity schedule; this piece focuses on the Gantt view itself.
Gantt or kanban? When each one wins
They're not rivals — they're two views of the same project, and modern tools let you switch between them. But each shines in a different scenario:
- Use a Gantt chart when dates rule: there's a fixed delivery, tasks depend on each other, and you need to see whether you'll make it in time. Think events, product launches, construction.
- Use kanban when flow rules: work arrives continuously, there's no single end date, and what matters is how much sits in each stage. Think support queues, content production, order fulfillment.
- Use both when a project has a deadline but day-to-day work is managed by status: plan in Gantt, execute in kanban. In Doku it's the same data — switching views is one click.
How to build a free online Gantt chart in 4 steps
Here's the short path in Doku — no formulas, no spreadsheet templates, no drawing bars by hand. The free plan includes the Gantt view, so you don't need a card to try it.
Describe your project
Create your free account and tell Doku what you're doing, who's involved, and when it needs to be done — typed or out loud. The AI turns that description into a task list with proposed dates, so you never start from a blank screen.
Adjust dates and owners
Review the draft: fix any durations you know are off, assign one owner per task (a person, not "the team"), and pad anything that depends on third parties like approvals or vendors.
Switch to the Gantt view and link dependencies
Open the Gantt view and your tasks appear as bars on a timeline. Chain the ones that depend on each other so the real order is visible; drag bars to move dates and everything downstream adjusts without breaking.
Let the follow-up run itself
Turn on reminders and the daily email digest. When something slips, Doku nudges the right person and you see the impact on the bars — no chasing people on chat, no updating cells by hand.
What about doing it in a spreadsheet?
You can, and for a one-week project with three tasks it may be enough: rows for activities, columns for days, cells painted as bars. The trouble starts when anything changes — moving a date means repainting cells, dependencies live in your head, and two weeks in the file no longer matches reality. An online Gantt chart maker updates by dragging a bar, recalculates whatever depends on it, and the whole team sees the same version. If your project involves more than one person or runs longer than a couple of weeks, the spreadsheet ends up costing you more time than it saves.
Your Gantt chart, free and formula-free
Describe your project to Doku — typed or out loud — and get a Gantt chart with dates, owners, dependencies, and automatic reminders. Free plan, no card required.
Create my free Gantt chartFrequently asked questions
Is a Gantt chart the same as a project schedule?
In everyday use, mostly yes. Strictly, the schedule is the plan — activities, dates, owners — and the Gantt chart is one way to visualize it, with horizontal bars. Every Gantt chart is a schedule, but a schedule can also live as a calendar or a kanban board.
How do you make a Gantt chart in Excel or Google Sheets?
Two ways: paint cells by hand (one row per task, one column per day or week) or fake the bars with a stacked bar chart and formulas. Both work for very small projects, but they demand manual upkeep, can't handle dependencies, and go stale fast. For team projects, use a tool with a built-in Gantt view.
When should you NOT use a Gantt chart?
When work has no clear end dates or arrives continuously — support, maintenance, recurring content production. A kanban board reflects that reality better, because what matters is flow through stages, not position on a calendar. It's also overkill for two- or three-task projects: a simple list is enough.
What free Gantt chart maker can I use?
Doku includes a Gantt view on its free plan, alongside list and kanban views, unlimited tasks, and email reminders. Its AI also drafts the first version of your project from a written or spoken description, so you don't start from zero. No card required to sign up.