Dartboard Dimensions: Size, Measurements & Segment Breakdown 🎯

Picture this: you’ve just moved into your first home. You’ve got a brand-new dartboard, a fresh set of tungsten darts, and an empty wall in the garage that’s begging for action. So you hammer a nail, hang the board at what feels about right, step back, and start throwing.

Three months later, you head to your local pub league. You step up to the oche — and immediately something feels completely off. Your throws are going high. Doubles have become a struggle. Meanwhile, muscle memory is screaming at you.

That’s the moment most players discover that dartboard dimensions actually matter. A lot.

Whether you’re mounting your very first board or you’ve been playing for years and want to geek out on the official specifications, this guide covers everything. We’re talking official dartboard dimensions, every scoring zone measured to the millimetre, why the numbers are in that seemingly random order, and a full setup checklist so your board is absolutely regulation-perfect.

🎯 Every measurement in this guide is cross-referenced against the official standards of the World Darts Federation (WDF) and the Professional Darts Corporation (PDC).

🎯 What Is the Standard Dartboard Size?

Let’s start with the big picture — literally. The standard dartboard diameter is 17¾ inches, or 451 mm. You’ll sometimes see this rounded to 18 inches (457 mm) in casual conversation, and that’s fine for everyday use. But the precise WDF specification stops at the outer edge of the double ring wire.

The difference between 17¾” and 18″? It’s the wire surround and mounting edge. So when you’re buying a dartboard cabinet or surround, always allow for the full 18 inches of space.

Beyond the diameter, there are two other physical specs worth knowing before you buy:

• Depth (thickness): 1.5 inches (38.1 mm) — how far the board protrudes from your wall
• Weight: 10–12 lb (4.54–5.44 kg) for a quality sisal board
• Circumference: 55.78 inches (141.69 cm)

That depth figure is actually more important than most people realise. Measure the official throwing distance from the face of the board rather than the wall. So if you measure your oche from the wall, you’re already 1.5 inches short. We’ll come back to that in the setup section.

Steel-Tip vs Soft-Tip: Are the Dimensions Different? 🎯

Great question — and one most articles skip over entirely. Both steel-tip and soft-tip dartboards share the same 17¾” diameter. The board itself is the same size. However, soft-tip boards often have slightly larger target areas on the bullseye and scoring rings. This compensates for the lighter weight of plastic-tipped darts, which don’t penetrate the surface as aggressively.

The bigger difference between steel-tip and soft-tip setups comes from the throwing distance — and we’ll cover that in full detail later.

📐 Every Dartboard Zone Measured: The Complete Breakdown

A dartboard may look simple, but it follows a carefully designed scoring system. Multiple concentric zones create different scoring areas, each with specific measurements. Let’s explore every section from the bullseye outward.

📐 All measurements below are taken from the centre of the bullseye to the relevant boundary, or as diameters/widths of the zone itself.

The Bullseye: Tiny Target, Maximum Reward 🎯

The bullseye is split into two distinct zones, and the difference between them matters enormously in competitive play.

Inner Bull (Double Bull): Just 12.7 mm in diameter. It’s red, worth 50 points, and counts as a double — meaning it’s the only way to finish on a score that requires a double when you’re on 50.

Outer Bull (Single Bull): 31.8 mm in diameter. It’s green, worth 25 points, and counts as a single score. You can’t finish a leg with it if you’re trying to hit a double.

Together, these two zones take up a surprisingly tiny portion of the board. That’s by design.

Treble and Double Rings: The Scoring Multipliers

Both the treble ring and the double ring share the same width: exactly 8 mm each. They’re the narrowest scoring zones on the entire board. That’s roughly the width of your thumbnail. And yet landing on them consistently is what separates good players from great ones.

The treble ring sits approximately 107 mm from the centre of the bullseye. The double ring sits further out at around 170 mm. Between and around these rings are the large single-score areas — the “body” of each numbered segment.

• Miss the treble 20 by a fraction? You’ll land in the large single 20 — still useful.
• Miss the double 16 finishing shot in a leg of 501? You’ve wasted your throw completely.
• That’s precisely why these rings are so narrow. Pressure matters.

🔢 The Number Arrangement: Why Is It So “Random”?

Ask any newcomer to darts and they’ll say the same thing: the numbers on a dartboard look completely random. 20 at the top, then 1 and 5 on either side of it, then 18 and 4… it makes no obvious sense. Until you understand the genius behind it.

The layout is attributed to Brian Gamlin, a carpenter from Bury, Lancashire, who is credited with devising the arrangement back in 1896. His goal was brilliant in its simplicity: make the game a test of skill, not luck.

🔢 There are 2,432,902,008,176,640,000 different ways to arrange 20 numbers on a dartboard. Gamlin’s arrangement is considered almost mathematically perfect for competitive play.

How the Layout Punishes Inaccuracy

The key principle is this: every high-value segment has a low-value segment on each side of it. This means that missing slightly to the left or right of your target costs you dearly.

• Aim for 20 and miss left → you hit 1. Miss right → you hit 5.
• Aim for 19 and miss left → you hit 7. Miss right → you hit 3.
• Aim for 18 and miss left → you hit 4. Miss right → you hit 1.

Before Gamlin’s layout, dartboards often used sequential numbering. With numbers 18, 19 and 20 sitting next to each other, even a wild miss could still reward you with a solid score. Gamlin eliminated that possibility entirely.

The full clockwise sequence starting from 20 at the top: 20, 1, 18, 4, 13, 6, 10, 15, 2, 17, 3, 19, 7, 16, 8, 11, 14, 9, 12, 5.

📏 Official Dartboard Height: Where to Mount It

Getting the height right is the single most important thing you can do when setting up a dartboard. Get it wrong and your muscle memory will learn incorrect habits that are genuinely hard to unlearn later.

The official standard is beautifully simple:

📏 The centre of the bullseye must sit exactly 5 feet 8 inches (173 cm / 1.73 metres) above the floor. This applies to steel-tip, soft-tip, home games and professional tournaments alike — the WDF, PDC and BDO all agree.

Measure from your finished floor surface — not a raised dart mat. If you’re standing on a 1-inch thick mat, you need to raise your board by that same inch to keep the bullseye at the correct relative height.

Wheelchair Accessibility Standard

For players competing from a wheelchair, the BDO specifies a modified bullseye height of 4 feet 6 inches (137 cm). The throwing distance remains unchanged at the standard regulation measurement.

Step-by-Step Mounting Guide 🎯

1. Mark the wall at exactly 5’8″ (173 cm) from the floor. Use a tape measure — not your eye.
2. Drive a sturdy nail or mounting hook at that mark.
3. Hang the board and verify the bullseye centre aligns with your mark. Use a spirit level to confirm the board is perfectly vertical.
4. Rotate the board so the 20 segment is perfectly centred at 12 o’clock. Even a small rotation misaligns the board for every player.
5. Now measure your throwing distance from the face of the board — not the wall.

🚶 Official Throwing Distance: How Far Should You Stand?

The throwing line — called the oche (pronounced “ockey”) — is where you stand to throw. And the measurement here is more nuanced than most people expect, because it differs between steel-tip and soft-tip darts.

The #1 Measurement Mistake: Wall vs Face 🎯

Here’s the mistake that catches nearly everyone out: a standard sisal dartboard protrudes 1.5 inches from the wall. If you measure your 7′ 9.25″ from the wall, you’re actually standing 1.5 inches too close. You’ve created a short oche.

Always measure from the face of the dartboard. Drop a plumb line from the bullseye to the floor, mark that point, then measure horizontally from there to where your oche line will be.

The Diagonal Verification Method

Professional installers use the diagonal check as a foolproof way to verify both height and distance at once — especially useful on uneven floors. The diagonal distance from the centre of the bullseye to the front of the oche should be:

• Steel-tip: 9 feet 7⅜ inches (2.93 metres)
• Soft-tip: 9 feet 9½ inches (2.98 metres)

If your diagonal measurement is correct, your height and horizontal distance are automatically confirmed. It’s the one measurement that catches both errors simultaneously.

🏠 Room Dimensions: How Much Space Do You Actually Need?

Before you mount a dartboard, you need to make sure your room can safely accommodate it. Bounce-outs happen. Errant throws happen. And a dart bouncing into a TV or a window is nobody’s idea of a good evening.

Minimum Room Requirements

• Throwing distance from board face: 7′ 9.25″ (steel-tip) or 8′ (soft-tip)
• Plus the board’s protrusion from wall: 1.5″
• Plus comfortable room behind the oche for the thrower: at least 3 feet
• Total minimum room depth: approximately 12–13 feet
• Recommended room width: at least 5 feet either side of the board centre
• Recommended clear height: 8 feet minimum (9 feet preferred)

If you’re working with a tight space, a dart mat is a great investment. It protects your floor, clearly marks the oche, and often has the exact throwing distance pre-measured and printed on it.

🏠 Pro tip: Always position your scoreboard to the left or right of the board — never directly above or below it. You should be able to read the score without changing your throwing stance.

🎯 Dartboard Materials: What’s Your Board Made Of?

The dimensions of a dartboard are one thing. But what the board is actually made from has a huge impact on how it performs, how long it lasts, and how satisfying it feels to play on.

Sisal Fibre (Bristle) — The Professional Standard

The vast majority of quality dartboards — from mid-range home boards to those used on the PDC World Championship stage — are made from sisal fibre. Sisal comes from the agave plant and is harvested in East Africa and Brazil.

The fibres are collected into bundles, compressed into disc shapes, and bonded to a circular backing board. The surface is sanded smooth before the wire spider and number ring are added.

The key advantage of sisal is its self-healing property. When a dart punctures the surface and is removed, the fibres naturally spring back together. This dramatically extends the board’s lifespan compared to alternatives.

Cork and Paper Boards

These are cheap entry-level boards. Cork compresses permanently when a dart hits it, leaving visible holes that accumulate over time. Paper boards are typically used for children’s magnetic dart sets. Neither is appropriate for serious play.

Blade Wiring vs Round-Wire Spider

The metal spider — the framework of wires dividing the scoring zones — comes in two main forms:

• Blade wiring: triangular cross-section wire, flat edge facing out — deflects darts into scoring zones, used on all professional-grade boards
• Round wire: wider dead zone, more bounce-outs — common on budget boards
• Moveable number ring: lets you rotate the board regularly to even out wear on heavily targeted segments

📊 Steel-Tip vs Soft-Tip Dartboards: Full Comparison 🎯

⚙️ Common Setup Mistakes and How to Avoid Them

Getting your board perfectly set up isn’t complicated — but there are a handful of specific mistakes that derail almost every first-time installation. Here’s what to watch out for.

Mistake 1: Measuring from the Wall, Not the Board Face

The most common error in home setups. Your board sticks out 1.5 inches from the wall. Every measurement for throwing distance must come from the face of the board. Measuring from the wall shortens your oche.

Mistake 2: Not Using a Spirit Level

A board that’s even slightly tilted left or right will look and feel wrong every single time you play. Take two minutes with a spirit level. It’s worth it.

Mistake 3: Forgetting to Rotate the Board

Professional sisal boards have a moveable number ring for one reason: so you can rotate the board regularly to even out dart wear. Most wear happens on segments 20, 19, 18 and the bullseye. Rotating every few weeks dramatically extends its lifespan.

Mistake 4: Poor Lighting

A dartboard needs even, shadow-free lighting. Shadows across the board make it harder to aim accurately and can make certain zones harder to see. A dedicated dartboard light that sits above the board and illuminates the surface evenly is the ideal solution.

Mistake 5: No Surround or Backboard

Bounce-outs happen to everyone, from beginners to professionals. Without a surround or backboard, your wall will collect dart holes rapidly. A foam surround that circles the board catches strays and protects the wall with minimal cost.

🏆 Quick Reference: Full Dartboard Dimensions Cheat Sheet

🏆 Print this or save it to your phone. Everything you need in one place.

❓ Frequently Asked Questions

Q: What is the official size of a dartboard?

The official regulation dartboard diameter is 17¾ inches (451 mm), as specified by the World Darts Federation. You’ll often see this rounded to 18 inches in casual usage, which accounts for the wire surround and mounting edge.

Q: How high should a dartboard be mounted on the wall?

The bullseye centre should be exactly 5 feet 8 inches (173 cm) from the floor. This is a universal standard agreed upon by the WDF, PDC and BDO, and it applies equally to steel-tip and soft-tip setups, home play and professional tournaments.

Q: How far do you stand from a dartboard?

For steel-tip darts, the oche should be 7 feet 9.25 inches (2.37 metres) from the face of the dartboard — not the wall. For soft-tip/electronic boards, the distance increases to 8 feet exactly (2.44 metres). Always measure from the face, not the wall.

Q: What is the bullseye size on a regulation dartboard?

The inner bull (double bull) has a diameter of 12.7 mm (0.5 inches) and scores 50 points. The outer bull (single bull) has a diameter of 31.8 mm (1.25 inches) and scores 25 points.

Q: Why are dartboard numbers in a seemingly random order?

The arrangement is attributed to Brian Gamlin, a Lancashire carpenter, in 1896. The layout deliberately places low-value numbers adjacent to high-value ones — for example, 1 and 5 either side of 20 — to penalise inaccurate throws and make darts a test of genuine skill rather than luck.

Q: How wide are the treble and double rings on a dartboard?

Both the treble ring and the double ring are exactly 8 mm wide each. The treble ring sits approximately 107 mm from the centre, while the double ring sits approximately 170 mm from the centre.

Q: Can I use the same dartboard for steel-tip and soft-tip darts?

No — the boards are different. Steel-tip boards are made from sisal fibre, while soft-tip/electronic boards have plastic segments designed for plastic-tipped darts. Using steel-tip darts on an electronic board will damage the segments.

Q: How do I verify my dartboard setup is correct?

Use the diagonal verification method. Measure diagonally from the centre of the bullseye to the oche. For steel-tip this should be 9 feet 7⅜ inches (2.93 metres). If that diagonal is correct, both your height and horizontal distance are automatically confirmed.

Q: What is the throwing line in darts called?

It’s called the oche (pronounced “ockey”). In professional tournaments, the oche is a thin raised strip of wood approximately 1.5 inches high. In home play, a simple piece of tape on the floor works perfectly — as long as it’s at the correct distance.

🎯 Final Thoughts: Get the Dimensions Right, Then Get Throwing

Dartboard dimensions aren’t the most glamorous topic in darts. But they’re the foundation everything else is built on. A board hung at the wrong height teaches your throwing arm the wrong angles. A short oche builds habits that fall apart the moment you play anywhere else. Getting these basics right from day one makes every hour of practice genuinely count.

To recap what matters most:

• Board diameter: 17¾” (451 mm)
• Bullseye height: 5′ 8″ (173 cm) from the floor
• Steel-tip throwing distance: 7′ 9.25″ (2.37 m) from the board face
• Soft-tip throwing distance: 8′ 0″ (2.44 m) from the board face
• Diagonal verification: 9′ 7⅜” for steel-tip setups

Once your setup is perfect, everything else is just practice — and that’s the fun part. Now go hang that board, mark out your oche, and start throwing.

💬 Found this guide useful? Share it with anyone who’s setting up their first dartboard. And drop a comment below — we’d love to know what setup you’re working with! 🎯