Revolutions to Circles Conversion (r to cir)

Revolutions to Circles Converter

Enter the angle in revolutions below to convert it to circles.

Result in Circles:

1 r = 1 cir

How to Convert Revolutions to Circles

To convert a measurement in revolutions to a measurement in circles, divide the angle by the following conversion ratio: 1 revolutions/circle.

Since one circle is equal to 1 revolution, you can use this simple formula to convert:

circles = revolutions ÷ 1

The angle in circles is equal to the angle in revolutions divided by 1.

For example, here's how to convert 5 revolutions to circles using the formula above.

circles = (5 r ÷ 1) = 5 cir

How Many Circles Are in a Revolution?

There are 1 circle in a revolution, which is why we use this value in the formula above.

1 r = 1 cir

Revolutions and circles are both units used to measure angle. Keep reading to learn more about each unit of measure.

What Is a Revolution?

A revolution, or turn, is equal to 1 rotation around a circle, or 360°. Revolutions are commonly used to measure the speed of rotation, for example when measuring the revolutions per minute (RPM) of a vehicle's engine.

A revolution is sometimes also referred to as a turn, cycle, or complete rotation. Revolutions can be abbreviated as r, and are also sometimes abbreviated as rev or cyc. For example, 1 revolution can be written as 1 r, 1 rev, or 1 cyc.

Learn more about revolutions.

What Is a Circle?

A circle is the equivalent of 1 revolution around a circle, or 360°.

A circle is sometimes also referred to as a revolution. Circles can be abbreviated as cir; for example, 1 circle can be written as 1 cir.

A circle is more commonly used to describe a round, symmetrical shape with no corners or edges than it is to describe plane angle. The shape is described by its radius and circumference.

Learn more about circles.

Revolution to Circle Conversion Table

Table showing various revolution measurements converted to circles.
Revolutions	Circles
1 r	1 cir
2 r	2 cir
3 r	3 cir
4 r	4 cir
5 r	5 cir
6 r	6 cir
7 r	7 cir
8 r	8 cir
9 r	9 cir
10 r	10 cir
11 r	11 cir
12 r	12 cir
13 r	13 cir
14 r	14 cir
15 r	15 cir
16 r	16 cir
17 r	17 cir
18 r	18 cir
19 r	19 cir
20 r	20 cir
21 r	21 cir
22 r	22 cir
23 r	23 cir
24 r	24 cir
25 r	25 cir
26 r	26 cir
27 r	27 cir
28 r	28 cir
29 r	29 cir
30 r	30 cir
31 r	31 cir
32 r	32 cir
33 r	33 cir
34 r	34 cir
35 r	35 cir
36 r	36 cir
37 r	37 cir
38 r	38 cir
39 r	39 cir
40 r	40 cir

Table showing various revolution measurements converted to circles.

Revolutions

Circles

1 r

1 cir

2 r

2 cir

3 r

3 cir

4 r

4 cir

5 r

5 cir

6 r

6 cir

7 r

7 cir

8 r

8 cir

9 r

9 cir

10 r

10 cir

11 r

11 cir

12 r

12 cir

13 r

13 cir

14 r

14 cir

15 r

15 cir

16 r

16 cir

17 r

17 cir

18 r

18 cir

19 r

19 cir

20 r

20 cir

21 r

21 cir

22 r

22 cir

23 r

23 cir

24 r

24 cir

25 r

25 cir

26 r

26 cir

27 r

27 cir

28 r

28 cir

29 r

29 cir

30 r

30 cir

31 r

31 cir

32 r

32 cir

33 r

33 cir

34 r

34 cir

35 r

35 cir

36 r

36 cir

37 r

37 cir

38 r

38 cir

39 r

39 cir

40 r

40 cir