Surface roughness: Selection of measurable parameters according to ISO 4287 and ISO 13565
| Ra | arithmetic mean over the entire measurement length |
| Rq | root mean square value |
| Rt | total height of the roughness profile |
| Rmax | maximum height of the roughness profile within a single measurement section |
| Rz | average height of the roughness profile |
| Rp | height of the highest 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 region\ |
| Rpk | Reduced peak height\ |
| Rvk | Reduced valley depth\ |
| Mr1 | Material fraction above the core region (Abbott curve)\ |
| Mr2 | Load-bearing material fraction (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 | Arithmetic mean height of the scale-limited surface |
| Sq | Root mean square height of the scale-limited surface |
| Sp | Maximum peak height of the scale-limited surface |
| Sv | Maximum valley height of the scale-limited surface |
| Sz | Maximum height of the scale-limited surface |
| S10z | Ten-point height of the surface |
| Ssk | Skewness of the scale-limited surface |
| Sku | Kurtosis of the scale-limited surface |
| Sdq | Mean square gradient of the scale-limited surface |
| Sdr | Developed transition surface ratio of a scale-limited surface |
| FLT | Flatness |
| Sk | Core height |
| Spk | Reduced peak height |
| Svk | Reduced valley height |
| Smr1 | Material fraction of peaks |
| Smr2 | Material fraction of 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 |