Radians: conversions & definition
Radians (rad) represent plane angle. One unit equals 10^0 rad. A radian is the plane angle subtended by an arc whose length equals the radius.
Choose the unit you need
Each row converts one rad. Open a converter to enter any value and see its formula, worked example and reference table. Results below are rounded to 10 significant digits.
| Convert to | Equivalent value | Calculator |
|---|---|---|
| Attoradians (arad) | ≈ 1e+18 | Convert rad to arad |
| Centiradians (crad) | ≈ 100 | Convert rad to crad |
| Decaradians (darad) | ≈ 0.1 | Convert rad to darad |
| Deciradians (drad) | ≈ 10 | Convert rad to drad |
| Exaradians (Erad) | ≈ 1e-18 | Convert rad to Erad |
| Femtoradians (frad) | ≈ 1e+15 | Convert rad to frad |
| Gigaradians (Grad) | ≈ 1e-9 | Convert rad to Grad |
| Hectoradians (hrad) | ≈ 0.01 | Convert rad to hrad |
| Kiloradians (krad) | ≈ 0.001 | Convert rad to krad |
| Megaradians (Mrad) | ≈ 0.000001 | Convert rad to Mrad |
| Microradians (µrad) | ≈ 1,000,000 | Convert rad to µrad |
| Milliradians (mrad) | ≈ 1,000 | Convert rad to mrad |
| Nanoradians (nrad) | ≈ 1,000,000,000 | Convert rad to nrad |
| Petaradians (Prad) | ≈ 1e-15 | Convert rad to Prad |
| Picoradians (prad) | ≈ 1e+12 | Convert rad to prad |
| Quectoradians (qrad) | ≈ 1e+30 | Convert rad to qrad |
| Quettaradians (Qrad) | ≈ 1e-30 | Convert rad to Qrad |
| Ronnaradians (Rrad) | ≈ 1e-27 | Convert rad to Rrad |
| Rontoradians (rrad) | ≈ 1e+27 | Convert rad to rrad |
| Teraradians (Trad) | ≈ 1e-12 | Convert rad to Trad |
| Yoctoradians (yrad) | ≈ 1e+24 | Convert rad to yrad |
| Yottaradians (Yrad) | ≈ 1e-24 | Convert rad to Yrad |
| Zeptoradians (zrad) | ≈ 1e+21 | Convert rad to zrad |
| Zettaradians (Zrad) | ≈ 1e-21 | Convert rad to Zrad |
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