What Is Planning Poker? A Beginner's Guide to Agile Estimation

If you’ve just joined an agile team, you’ve probably heard someone say “let’s planning poker this one” and watched everyone reveal a number at the same time. If it looked a little like a card game, that’s because it is one. Here’s what’s actually going on—and how to run your own session in a couple of minutes.

What Is Planning Poker?

Planning poker (also called scrum poker) is a consensus-based estimation technique used by agile teams to size up work. Instead of one senior dev guessing how long a task will take, everyone estimates at the same time, then the team talks through any disagreement.

The “poker” part comes from the cards: each person picks a card representing their estimate and reveals it simultaneously, so nobody is influenced by what anyone else says first.

Why Not Just Have the Lead Estimate Everything?

Because the person who shouts a number first anchors everyone else. The moment someone says “that’s a two-day job,” the rest of the room quietly recalibrates around two days—even if half of them were thinking a week.

Planning poker fixes this with one simple rule: estimate privately, reveal together. It gives you two things:

• 🧠 Independent judgement — no anchoring on the loudest voice in the room
• 💬 Productive disagreement — when a 3 and a 13 land next to each other, that gap is the conversation worth having

That gap is the real value. A wide spread almost always means someone knows about a hidden complication—or someone has misunderstood the story.

How a Round Actually Works

A single round is quick:

1. Read the story. The product owner reads out a user story or task and answers questions.
2. Everyone votes at once. Each team member privately picks a card.
3. Reveal together. All cards flip at the same time.
4. Discuss the outliers. The highest and lowest estimators explain their reasoning.
5. Re-vote. Estimate again now that the hidden context is on the table.

You repeat until the team converges. Most stories settle in one or two rounds.

What Are the Numbers?

The cards usually aren’t a normal 1–10 scale. The most common deck is the Fibonacci sequence (1, 2, 3, 5, 8, 13, 21…), because the growing gaps reflect a simple truth: the bigger a task is, the less precisely you can estimate it. There’s a real difference between a 1 and a 2, but “is this a 20 or a 21?” is a meaningless question.

Other teams prefer T-shirt sizes (S, M, L, XL) for lighter-weight estimation, or powers of 2 (1, 2, 4, 8, 16). They all share the same idea: relative sizing, not exact hours.

Tips for Your First Session

• Estimate effort, not hours. Planning poker measures relative size, not a calendar.
• Timebox the discussion. Two minutes of debate per story, then re-vote.
• Don’t average the votes. A 3 and an 8 isn’t a 5.5—it’s a conversation.
• Keep it remote-friendly. Simultaneous reveals matter even more when you can’t read the room.

Run Your First Round in 30 Seconds

You don’t need an account, a trial, or a credit card to try it. Head to Planfree.dev, click Create Room, share the link with your team, and start estimating. It’s free, has no participant limits, and supports Fibonacci, T-shirt, and powers-of-2 decks out of the box.

Planfree.dev is open-source and actively maintained. Star or contribute on GitHub, or drop a feature idea via the in-app chat.