How to Measure a Football Pitch Penalty Box

To measure a football pitch penalty box, start at the inside of each goalpost and measure 16.5 metres outwards along the goal line. From those two points, measure 16.5 metres into the pitch at right angles, then join the ends with a line parallel to the goal line. The finished rectangle is 40.32 metres wide and 16.5 metres deep.

That’s the basic layout. But if you’re learning how to measure a football pitch penalty box, you’ll also need to distinguish the penalty spot, the smaller goal area and the curved marking called the D. They aren’t measured from the same starting point.

What exactly is the penalty box?

The penalty box is the rectangular area surrounding the goal, also called the penalty area or 18-yard box. It extends 18 yards outwards from each goalpost and 18 yards forwards into the pitch.

The name describes its depth, not its total width. The goal itself is eight yards wide, so the full box measures 18 yards plus eight yards plus another 18 yards: 44 yards across.

The metric dimensions use a goal width of 7.32 metres, with 16.5 metres on either side. Adding those together gives a total width of 40.32 metres.

The measurements you need

Keep these measurements separate before you begin marking. The penalty box, goal area and penalty arc are different parts of the layout.

Feature	Metres	Yards
Penalty box depth	16.5	18
Distance outwards from each goalpost	16.5	18
Total penalty box width	40.32	44
Penalty spot from the goal line	11	12
Penalty arc radius from the spot	About 9.1	10
Goal area depth	5.5	6

The dimensions above follow the established metric and yard measurements. Use one system throughout your layout rather than switching between metres and yards midway.

Start from the goalposts, not the centre

Use the inside edge of each goalpost as your reference. Measure 16.5 metres outwards along the goal line on each side, away from the goal opening. These two positions mark where the sides of the penalty area meet the goal line.

Don’t measure just 16.5 metres left and right from the centre of the goal. That would leave out the width of the goal opening and make the box too narrow. The correct total includes both side measurements and the 7.32-metre space between the posts.

For the physical marking, a measuring tape and temporary markers are useful. Mark the positions first, then check the layout before applying permanent lines.

Measure straight out into the pitch

From each marked position on the goal line, measure 16.5 metres into the field, perpendicular to the goal line. In plain language, each side must form a right angle with the goal line.

Join the two forward points with a straight line parallel to the goal line. This completes the rectangular penalty area, with the goal centred along its back edge.

As a final width check, the front line should span 40.32 metres when using the metric layout, or 44 yards when using the yard layout.

Where should the penalty spot go?

The penalty spot sits directly in line with the centre of the goal, 11 metres or 12 yards from the goal line. Measure forwards from the goal line, not backwards from the front of the penalty box.

So you’ll need the goal’s centre for this part, even though the side boundaries were measured outwards from the posts. Keeping those reference points separate helps avoid mixing up the box width and the spot position.

How do you measure the D?

The D is the penalty arc outside the front of the box. Its centre is the penalty spot, and its radius is 10 yards, or about 9.1 metres. A radius is simply the distance from a circle’s centre to its edge.

To lay it out, use that distance from the spot and mark only the curved section outside the penalty area. Don’t draw a complete circle around the spot.

The D is not part of the penalty area. It marks the required distance from the penalty spot during a penalty kick; players other than the kicker and goalkeeper must remain outside both the box and the arc until the kick is taken.

Is the six-yard box measured the same way?

The smaller rectangle follows a similar layout, but its measurements are different. Measure 5.5 metres, or six yards, outwards from each goalpost along the goal line, then the same distance into the pitch. Join the forward ends with a line parallel to the goal line.

This is the goal area, commonly called the six-yard box. In yard measurements, it is 20 yards wide and six yards deep, compared with the penalty area’s 44-yard width and 18-yard depth.

Does the painted line count as inside the box?

Yes. Pitch markings belong to the areas they define, so the penalty-area boundary line is part of the penalty area. A direct-free-kick offence committed by a defender on that boundary can therefore result in a penalty.

But being inside the box doesn’t make every offence a penalty. The relevant distinction is whether the defending team’s offence is punishable by a direct free kick.

When you’re marking the pitch, keep the boundary lines consistent: all pitch lines must have the same width and must not exceed 12 centimetres. Getting the rectangle right matters, but so does making its boundary clear.