Profile Roughness: Selection of Measurable Parameters According to ISO 4287 and ISO 13565
| Ra | arithmetic mean over the entire measurement length |
| Rq | quadratic mean |
| 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 peak in the roughness profile |
| Rv | Depth of the lowest valley in the roughness profile |
| Rk | Core roughness depth, height of the core region |
| Rpk | Reduced center height |
| Rvk | Reduced valley depth |
| Mr1 | Material portion above the core region (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 | Arithmetic mean height of the scale-limited surface |
| Sq | Quadratic mean height of the scale-limited surface |
| Sp | Maximum center height of the scale-limited surface |
| Sv | Maximum pit 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 interfacial area ratio of a scale-limited surface |
| FLT | Flatness |
| Sk | Core height |
| Spk | Reduced center height |
| Svk | Reduced valley depth |
| Smr1 | Material portion of peaks |
| Smr2 | Material portion 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 center height |
| Str | Aspect ratio of the surface texture |
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