Measures and bar lines explained for kids

A bar line is an upright line drawn through the staff. The space between two bar lines is a measure, which is also called a bar. Each measure holds the same number of beats, and the time signature at the start says how many. Bar lines sort a long row of notes into small groups that the eye can count.

Measure or bar?

Both words mean the same thing. “Measure” is the usual word in the United States. “Bar” is the usual word in Britain, and you will hear both in Canada. This site uses both.

What a measure holds

The top number of the time signature tells how many beats go in each measure.

Time signature	Beats in each measure	Count
2/4	Two	“1, 2”
3/4	Three	“1, 2, 3”
4/4	Four	“1, 2, 3, 4”

The notes and rests in a measure add up to that number. In 4/4 time, a measure can hold one whole note, or two half notes, or four quarter notes, or any mix that makes four beats.

The first beat of each measure is a little stronger than the rest. It is called the downbeat.

Read time signatures explained and note values explained.

Kinds of bar line

Bar line	What it looks like	What it means
Single bar line	One thin line	The end of a measure
Double bar line	Two thin lines	The end of a section
Final bar line	A thin line and a thick line	The end of the piece. Some charts call this a double bar line too.
Repeat sign	A final bar line with two dots	Go back and play the section again

A repeat sign with its dots on the right marks the start of the part to repeat. A repeat sign with its dots on the left sends the player back.

For other signs, read musical symbols and their meanings.

Measure numbers

Measures are counted from the start of the piece. Many books print a small number at the start of each line. Teachers use these numbers in lessons: “Start at measure 9.”

If your child’s book has no numbers, write them in pencil at the start of each line. It makes practice easier to talk about.

Pickup notes

Some pieces start before the first full measure. The notes that come early are called pickup notes, or an upbeat.

“Happy Birthday” is one. The word “happy” comes before the first strong beat, which lands on “birth.”

A pickup measure does not have its full count of beats. The last measure of the piece is often cut short by the same amount, so the two add up to one full measure. Measure 1 is the first full measure, not the pickup.

Long rests in band and orchestra parts

A player in a band or an orchestra may have many measures with nothing to play. The part shows a thick bar with a number above it, such as 8. The player counts eight empty measures and comes in after them.

Players count these as “1, 2, 3, 4. 2, 2, 3, 4. 3, 2, 3, 4,” with the measure number in place of the first beat.

Why music has bar lines

• They group the beats. The eye sees four beats at a glance.
• They mark the strong beat. The note after a bar line is the downbeat.
• They keep players together. A whole orchestra can start at the same measure.

Early written music had no bar lines. They came into common use in the 1600s.

Common mistakes

• Stopping at each bar line. A bar line is not a pause. The beat goes on without a gap.
• Miscounting a measure. If the beats do not add up, check for a dot or a rest.
• Calling the pickup measure 1.

Games to play

Draw the bar lines. Write eight quarter notes in a row with a 4/4 time signature. Your child draws a bar line after every four beats. Then mix in half notes.

Fill the measure. Draw four empty measures in 3/4 time. Your child fills each one with notes that add up to three. Use rhythm cards if writing is slow.

Find the mistake. Write a measure with too many beats. Your child finds it and fixes it.

Stomp the downbeat. Play a march. Stomp on beat 1 and clap on the others. Then try a waltz, and count in threes.

Measure hunt. Call out a measure number in your child’s piece. Your child puts a finger on it as fast as they can.

Print and play

Write measures on staff paper, or make your own with the staff paper maker. For more games, read rhythm games for kids. For longer notes, read dotted notes and ties explained.