Profile roughness: Selection of measurable parameters according to ISO 4287 and ISO 13565
| Ra | arithmetic mean value over the entire measuring length |
| Rq | square mean value |
| Rt | total height of the roughness profile |
| Rmax | maximum height of the roughness profile within a single measuring section |
| Rz | average height of the roughness profile |
| Rp | height of the largest profile peak in the roughness profile |
| Rv | depth of the largest profile valley in the roughness profile |
| Rk | Core roughness depth, height of the core area |
| Rpk | reduced peak height |
| Rvk | reduced groove depth |
| Mr1 | Material portion above the core area (Abbott curve) |
| Mr2 | load-bearing material portion (Abbott curve) |
| Rsm | average groove width |
| RPc | peak count value |
Surface roughness: Selection of measurable parameters according to ISO 25178-2 and ISO 16610
| Sa | average arithmetic height of the scale-limited surface |
| Sq | average square height of the scale-limited surface |
| Sp | maximum peak height of the scale-limited surface |
| Sv | maximum sink height of the scale-limited surface |
| Sz | maximum height of the scale-limited surface |
| S10z | Ten-point height of the surface |
| Ssk | Slope of the scale-limited surface |
| Sku | kurtosis of the scale-limited surface |
| Sdq | mean square gradient of the scale-limited surface |
| Sdr | developed transition area ratio of a scale-limited surface |
| FLT | flatness |
| Sk | core height |
| Spk | reduced peak height |
| Svk | reduced valley height |
| Smr1 | material fraction peaks |
| Smr2 | material fraction valleys |
| Vmc | Core material volume of a scale-limited surface |
| Vmp | peak material volume of a scale-limited surface |
| Vvc | empty volume of the core of a scale-limited surface |
| Vvv | empty volume of the valleys of a scale-limited surface |
| Sxp | Extreme value of the peak height |
| Str | aspect ratio of the surface texture |
