Time Signatures Explained: 4/4, 3/4, 6/8 and Compound Time
A time signature is the pair of numbers at the start of the music. The top number says how many beats are in each measure and the bottom number says which note gets one beat: 4 means a quarter note and 8 an eighth note. So 4/4 has four quarter note beats and 3/4 has three. In compound time, such as 6/8, each beat splits into three.
Updated · By the Classfern Music Department
Works in the UK and the US. This version uses US words and grades (measure, staff, quarter note, elementary school); the UK version uses bar, stave, crotchet and Key Stages. · UK version of this page
Key facts
- Top number: how many beats in each measure. Bottom number: which note is one beat (2 = half note, 4 = quarter note, 8 = eighth note).
- Simple time (2/4, 3/4, 4/4): each beat splits into two. Compound time (6/8, 9/8, 12/8): each beat is a dotted quarter note and splits into three.
- Duple = 2 beats, triple = 3, quadruple = 4: so 6/8 is compound duple and 3/4 simple triple.
- 4/4 is also called common time (𝄴); 2/2 is cut time or alla breve (𝄵).
- Irregular (odd) time signatures such as 5/4 and 7/8 mix groups of 2 and 3.
What is a time signature in music theory?
A time signature is the pair of numbers at the start of a piece. The top number says how many beats are in each measure and the bottom number says which note value gets one beat: 4 means a quarter note, 8 an eighth note. So 4/4 has four quarter note beats in every measure and 3/4 has three.
A time signature is not a fraction, and it does not say how fast to play – that is the tempo. It appears once at the start, and again only if it changes.
Time signature player: hear and count it
The first beat of each measure has a high click and a low piano note; other strong beats are medium; the rest are quiet. The counting lights up as it plays (underlined = strong, double underline = the first beat). In compound time the speed is the dotted quarter note beat.
Sounds are made in your browser. This tool never uses the microphone, and nothing is recorded, saved or sent.
| Time signature | Beats in each measure | Type | Count | Often heard in |
|---|---|---|---|---|
| 2/4 | 2 quarter note beats | simple duple | 1 2 | march, polka |
| 3/4 | 3 quarter note beats | simple triple | 1 2 3 | waltz, minuet |
| 4/4 | 4 quarter note beats | simple quadruple | 1 2 3 4 | most pop, rock and hymns (common time, 𝄴) |
| 2/2 | 2 half note beats | simple duple (cut time) | 1 2 | fast marches (cut time or alla breve, 𝄵) |
| 3/8 | 3 eighth note beats | simple triple | 1 2 3 | quick one-in-a-bar dances |
| 6/8 | 2 dotted quarter note beats | compound duple | 1 & a 2 & a | jigs, “Row, Row, Row Your Boat” |
| 9/8 | 3 dotted quarter note beats | compound triple | 1 & a 2 & a 3 & a | slip jigs |
| 12/8 | 4 dotted quarter note beats | compound quadruple | 1 & a 2 & a 3 & a 4 & a | slow blues, ballads |
| 5/4 | 5 quarter note beats (3 + 2) | irregular (3 + 2) | 1 2 3 4 5 | “Mars” from Holst’s The Planets |
| 7/8 | 7 eighth notes (2 + 2 + 3) | irregular (2 + 2 + 3) | 1 & 2 & 3 & a | Balkan folk dances |
What is the difference between simple and compound time?
In simple time each beat divides into two equal halves, so you count “1 & 2 &”. In compound time each beat is a dotted quarter note that divides into three, so you count “1 & a 2 & a”. 2/4, 3/4 and 4/4 are simple; 6/8, 9/8 and 12/8 are compound.
To find the number of beats in compound time, divide the top number by three: 6/8 has 2 beats, 9/8 has 3 and 12/8 has 4. Compound time gives music a lilting, skipping feel, like a jig.
What does 6/8 time mean?
6/8 means six eighth notes in each measure, grouped in two sets of three. It is compound duple time: you feel two strong beats, each a dotted quarter note, and count “1 & a 2 & a”. Played slowly you may count all six; at normal speed it swings along in two, like “Row, Row, Row Your Boat”.
3/4 also has six eighth notes in a measure, but grouped 2 + 2 + 2 – three beats instead of two. Play 3/4 and then 6/8 in the player above to hear the difference.
What are irregular time signatures like 5/4 and 7/8?
Irregular, or odd, time signatures have beats that cannot be split evenly into twos or threes, so they mix both. 5/4 is usually felt as 3 + 2 and 7/8 as 2 + 2 + 3 (or 3 + 2 + 2). Gustav Holst’s “Mars” from The Planets (1914–16) is a famous piece in 5/4.
Count the groups, not single beats: “1 2 3 1 2” for 5/4, “1 2 1 2 1 2 3” for 7/8. The player above accents the start of each group.
What is a pickup measure (anacrusis)?
A pickup, or anacrusis, is one or more notes before the first full measure of a piece. The pickup measure is incomplete, and the missing beats are usually taken from the last measure, so the two add up to one full measure.
Many songs start this way: in 3/4, a tune may begin on beat 3 so that the first strong word lands on beat 1. Count the missing beats silently before you start, and number the measures from the first full one.
Why is 4/4 called common time?
4/4 is called common time because it is the most common time signature in Western music, and it can be written as a C-shaped sign (𝄴). The sign actually comes from medieval notation, where a full circle meant “perfect” triple time and a broken circle meant “imperfect” duple time – it does not stand for the word common.
A C with a vertical line through it (𝄵) is cut time or alla breve: 2/2, counted in two half-note beats, often used for fast marches.
How do you conduct in 2, 3 and 4?
Conductors beat time with a pattern for each time signature, always going down on beat 1 and up on the last beat. In 2 the pattern is down–up; in 3 it is down–out–up (a triangle); in 4 it is down–in–out–up, with beat 2 crossing in front of the body and beat 3 going outwards.
Compound times are usually conducted in their main beats: 6/8 in 2, 9/8 in 3 and 12/8 in 4, with the smaller pulses shown inside each beat when the music is slow. Conducting along is one of the quickest ways to feel a new time signature.
Time signatures quiz
Marked by Classfern 5 multiple-choice questions on the Classfern lesson engine. Your answers stay on this device.
Classroom idea: move to the time signature
A 15-minute warm-up for kindergarten to grade 8 that needs only space to move and the player above.
- March in 2 (3 minutes): play 2/4 and march, stamping on beat 1.
- Waltz in 3 (3 minutes): play 3/4; pat your knees on 1 and clap on 2 and 3.
- Skip in 6/8 (3 minutes): play 6/8 and skip – two skips to every measure.
- Guess the time (4 minutes): play a time signature without showing it; pupils show 2, 3 or 4 fingers for the beats they feel.
- Check (2 minutes): Self-assessed each pupil writes down which time signatures they got right and which one felt hardest.
Classfern’s free time signature player is part of the Classfern Music Department at lessonplanner.info. Every click is made in your browser.
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