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 bar and the bottom number says which note gets one beat: 4 means a crotchet and 8 an quaver. So 4/4 has four crotchet 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 UK words and school years (bar, stave, crotchet, KS2, Year 4); the US version uses measure, staff, quarter note and grades. · US version of this page
Key facts
- Top number: how many beats in each bar. Bottom number: which note is one beat (2 = minim, 4 = crotchet, 8 = quaver).
- 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 crotchet 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 bar and the bottom number says which note value gets one beat: 4 means a crotchet, 8 an quaver. So 4/4 has four crotchet beats in every bar 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 bar 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 crotchet 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 bar | Type | Count | Often heard in |
|---|---|---|---|---|
| 2/4 | 2 crotchet beats | simple duple | 1 2 | march, polka |
| 3/4 | 3 crotchet beats | simple triple | 1 2 3 | waltz, minuet |
| 4/4 | 4 crotchet beats | simple quadruple | 1 2 3 4 | most pop, rock and hymns (common time, 𝄴) |
| 2/2 | 2 minim beats | simple duple (cut time) | 1 2 | fast marches (cut time or alla breve, 𝄵) |
| 3/8 | 3 quaver beats | simple triple | 1 2 3 | quick one-in-a-bar dances |
| 6/8 | 2 dotted crotchet beats | compound duple | 1 & a 2 & a | jigs, “Row, Row, Row Your Boat” |
| 9/8 | 3 dotted crotchet beats | compound triple | 1 & a 2 & a 3 & a | slip jigs |
| 12/8 | 4 dotted crotchet beats | compound quadruple | 1 & a 2 & a 3 & a 4 & a | slow blues, ballads |
| 5/4 | 5 crotchet beats (3 + 2) | irregular (3 + 2) | 1 2 3 4 5 | “Mars” from Holst’s The Planets |
| 7/8 | 7 quavers (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 crotchet 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 quavers in each bar, grouped in two sets of three. It is compound duple time: you feel two strong beats, each a dotted crotchet, 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 quavers in a bar, 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 an anacrusis (upbeat)?
An anacrusis, or upbeat, is one or more notes before the first full bar of a piece. The first bar is incomplete, and the missing beats are usually taken from the last bar, so the two add up to one full bar.
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 bars 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 minim 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 KS1 to KS3 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 bar.
- 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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