Bar / measure
The bar divides time into units of equal length, separated by barlines. It gives the music its regular pulse and orders which beats are stressed. The time signature at the start of the piece consists of two numbers.
- Upper number
- beats (note values) per bar
- Lower number
- note value of one beat (4 = quarter, 8 = eighth, 2 = half)
- Simple
- 2/4, 3/4, 4/4
- Compound
- 6/8, 9/8, 12/8
Reading the time signature
The bar is the unit between two barlines. The time signature at the start of the piece says how many beats fit into a bar and which note value forms one beat. How to read the two numbers and what distinguishes simple from compound time signatures is explained on the page Time signature.
| Time signature | Structure | Character |
|---|---|---|
| 4/4 | four quarter notes stress mainly on one and three | most common metre in pop, rock and marches, also written “C” |
| 3/4 | three quarter notes one-two-three, stress on one | typical waltz |
| 6/8 | six eighth notes two groups of three | rocking, flowing, as in ballads |
Bar and rhythm
The bar is the regular grid of stressed and unstressed beats. The rhythm is the concrete pattern of long and short notes laid over this grid. An upbeat is an incomplete bar that begins before the first stressed downbeat. The missing beats are usually made up at the end of the piece. More on this on the page Rhythm, and on the metronome.
Bars in the score
You find the time signature at the start of the piece. In these pieces from the sheet music archive you see different time signatures.
Piano
-
Menuett a-Moll BWV Anh. 120, from the Notebook for Anna Magdalena Bach · piano · 1 page
The time signature 3/4 is at the beginning. The piece starts with a single quarter note E as an upbeat, and the first full downbeat follows.
-
Armes Waisenkind Robert Schumann, op. 68 No. 6 · piano · 1 page
2/4, two quarter notes per bar. The piece starts with two sixteenth notes as an upbeat.
-
Wilder Reiter Robert Schumann, op. 68 No. 8 · piano · 1 page
6/8, six eighth notes in two groups of three. It begins with a single eighth note E as an upbeat.
-
Für Elise Ludwig van Beethoven, WoO 59 · piano · 3 pages
Here the signature is 3/8: three eighth notes per bar. The first two notes E and D♯ are the upbeat.
Common mistakes
- Equating bar and rhythm: The bar is the grid, the rhythm the pattern above it.
- Not counting the upbeat: The incomplete bar at the start is numbered 0 in the count.
Continue on Maikstrings
Related terms
Time signatureBeatTempoNote valueMetronomeSyncopationRestQuarter noteTriplet
Editor: Maik Krohm · reviewed on 3 October 2026
← Back to the glossary