| helf circle | 1 1/2 circle | 2 1/2 circle | 3 1/2 circle | 4 1/2 circle | 5 1/2 circle | 6 1/2 circle | 7 1/2 circle | 8 1/2 circle | 9 1/2 circle | 10 1/2 circle | 11 1/2 circle | 12 1/2 circle | 13 1/2 circle | 14 1/2 circle | 15 1/2 circle | 16 1/2 circle | 17 1/2 circle | 18 1/2 circle | 19 1/2 circle | 20 1/2 circle | 21 1/2 circle | 22 1/2 circle | 23 1/2 circle | 24 1/2 circle | 25 1/2 circle | 26 1/2 circle | 27 1/2 circle | 28 1/2 circle | 29 1/2 circle | 30 1/2 circle | 31 1/2 circle | 32 1/2 circle | 33 1/2 circle | 34 1/2 circle | 35 1/2 circle | 36 1/2 circle | 37 1/2 circle | 38 1/2 circle | 39 1/2 circle | 40 1/2 circle | 41 1/2 circle | 42 1/2 circle | 43 1/2 circle | 44 1/2 circle | 45 1/2 circle | 46 1/2 circle | 47 1/2 circle | 48 1/2 circle | 49 1/2 circle | 50 1/2 circle | 51 1/2 circle | 52 1/2 circle | 53 1/2 circle | 54 1/2 circle | 55 1/2 circle | 56 1/2 circle | 57 1/2 circle | 58 1/2 circle | 59 1/2 circle | 60 1/2 circle | 61 1/2 circle | 62 1/2 circle | 63 1/2 circle | 64 1/2 circle | 65 1/2 circle | 66 1/2 circle | 67 1/2 circle | 68 1/2 circle | 69 1/2 circle | 70 1/2 circle | 71 1/2 circle | 72 1/2 circle | 73 1/2 circle | 74 1/2 circle | 75 1/2 circle | 76 1/2 circle | 77 1/2 circle | 78 1/2 circle | 79 1/2 circle | 80 1/2 circle | 81 1/2 circle | 82 1/2 circle | 83 1/2 circle | 84 1/2 circle | 85 1/2 circle | 86 1/2 circle | 87 1/2 circle | 88 1/2 circle | 89 1/2 circle | 90 1/2 circle | 91 1/2 circle | 92 1/2 circle | 93 1/2 circle | 94 1/2 circle | 95 1/2 circle | 96 1/2 circle | 97 1/2 circle | 98 1/2 circle | 99 1/2 circle | 100 1/2 circle |
| gradian | 200 grad | 400 grad | 600 grad | 800 grad | 1 000 grad | 1 200 grad | 1 400 grad | 1 600 grad | 1 800 grad | 2 000 grad | 2 200 grad | 2 400 grad | 2 600 grad | 2 800 grad | 3 000 grad | 3 200 grad | 3 400 grad | 3 600 grad | 3 800 grad | 4 000 grad | 4 200 grad | 4 400 grad | 4 600 grad | 4 800 grad | 5 000 grad | 5 200 grad | 5 400 grad | 5 600 grad | 5 800 grad | 6 000 grad | 6 200 grad | 6 400 grad | 6 600 grad | 6 800 grad | 7 000 grad | 7 200 grad | 7 400 grad | 7 600 grad | 7 800 grad | 8 000 grad | 8 200 grad | 8 400 grad | 8 600 grad | 8 800 grad | 9 000 grad | 9 200 grad | 9 400 grad | 9 600 grad | 9 800 grad | 10 000 grad | 10 200 grad | 10 400 grad | 10 600 grad | 10 800 grad | 11 000 grad | 11 200 grad | 11 400 grad | 11 600 grad | 11 800 grad | 12 000 grad | 12 200 grad | 12 400 grad | 12 600 grad | 12 800 grad | 13 000 grad | 13 200 grad | 13 400 grad | 13 600 grad | 13 800 grad | 14 000 grad | 14 200 grad | 14 400 grad | 14 600 grad | 14 800 grad | 15 000 grad | 15 200 grad | 15 400 grad | 15 600 grad | 15 800 grad | 16 000 grad | 16 200 grad | 16 400 grad | 16 600 grad | 16 800 grad | 17 000 grad | 17 200 grad | 17 400 grad | 17 600 grad | 17 800 grad | 18 000 grad | 18 200 grad | 18 400 grad | 18 600 grad | 18 800 grad | 19 000 grad | 19 200 grad | 19 400 grad | 19 600 grad | 19 800 grad | 20 000 grad |
1/2 circle or half circle is equal to 360°/2 = 180°. Plural name is helf circles.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| helf circle | 1/2 circle | ≡ 180 ° | = 3.1415926 rad | Metric system SI |
| helf circles | gradians | helf circles | gradians |
|---|---|---|---|
| 1 | ≈ 200 | 6 | ≈ 1200 |
| 2 | ≈ 400 | 7 | ≈ 1400 |
| 3 | ≈ 600 | 8 | ≈ 1600 |
| 4 | ≈ 800 | 9 | ≈ 1800 |
| 5 | ≈ 1000 | 10 | ≈ 2000 |
The gradian is a unit of measurement of an angle, equivalent to 1/400 of a turn, 9/10 of a degree, or π/200 of a radian.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| gradian | grad | ≡ 1⁄400 of a revolution ≡ π⁄200 rad ≡ 0.9° | ≈ 15.707963×10−3 rad | Metric system SI |
| gradians | helf circles | gradians | helf circles |
|---|---|---|---|
| 1 | ≈ 0.005 | 6 | ≈ 0.03 |
| 2 | ≈ 0.01 | 7 | ≈ 0.035 |
| 3 | ≈ 0.015 | 8 | ≈ 0.04 |
| 4 | ≈ 0.02 | 9 | ≈ 0.045 |
| 5 | ≈ 0.025 | 10 | ≈ 0.05 |
| helf circles | gradians |
|---|---|
| 1 | ≈ 200 |
| 0.005 | ≈ 1 |
You can find the conversion in other languages in the following:
| Symbol | Definition |
|---|---|
| ≡ | exactly equal |
| ≈ | approximately equal to |
| = | equal to |
| digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |