gon to turn — convert gradians to turns
Exact 1 ÷ 400 = 0.0025
1 gradian in other units
| Degrees | 0.9 | ° |
|---|---|---|
| Radians | 0.01570796 | rad |
| Milliradians | 15.707963 | mrad |
| Arcminutes | 54 | ′ |
| Arcseconds | 3,240 | ″ |
| Turns | 0.0025 | turn |
gon to turn at a glance
| Gradians | Turns |
|---|---|
| 1 gon | 0.0025 turn |
| 2 gon | 0.005 turn |
| 3 gon | 0.0075 turn |
| 5 gon | 0.0125 turn |
| 10 gon | 0.025 turn |
| 20 gon | 0.05 turn |
| 25 gon | 0.0625 turn |
| 50 gon | 0.125 turn |
| 100 gon | 0.25 turn |
| 250 gon | 0.625 turn |
| 500 gon | 1.25 turn |
| 1,000 gon | 2.5 turn |
How to convert gradians to turns
Multiply by 0.0025 — one gradian is 0.0025 turns. That factor is exact: it comes from the definition of the units rather than from a measurement, so it will not change and does not need rounding.
Working 1 ÷ 400 = 0.0025
Questions
How many turns are in a gradian?
One gradian is 0.0025 turns. This figure is exact — it comes from the definition of the unit, not a measurement.
What is 1 gradian in turns?
1 gradian is 0.0025 turns. The working is 1 ÷ 400 = 0.0025.
How many degrees is one radian?
About 57.3°, or exactly 180/π. A radian is the angle you get when the arc along a circle is as long as its radius, which is why the number is awkward: it comes from the geometry rather than from someone choosing a round figure.
Why does maths use radians instead of degrees?
Because the calculus only comes out clean in radians. The derivative of sine is cosine only when the angle is in radians; in degrees a factor of π/180 turns up everywhere. Degrees are a human convention, radians are the circle's own unit.
Why 360 degrees in a circle?
Babylonian arithmetic, most likely, and it stuck because 360 divides so willingly — by 2, 3, 4, 5, 6, 8, 9, 10, 12 and more. Halves, thirds and quarters of a circle all land on whole numbers, which is more than can be said for 100.
What is a gradian for?
It is the metric attempt at angle: 100 gradians in a right angle, 400 in a full circle. It never displaced the degree in general use but survives in surveying in parts of Europe, and most scientific calculators still have a GRAD mode next to DEG and RAD.