Converter — enter any value
Ra
Arithmetic mean roughness
μm — Range: 0.012 – 50
Rz
Mean roughness depth
μm — Rz ≈ 4 × Ra (approx.)
N
Roughness grade (ISO 1302)
N1 (finest) to N12 (roughest)
Arithmetic mean
—
Ra μm
Mean depth
—
Rz μm
ISO grade
—
N-grade
N-grade reference (ISO 1302)
| N | Ra (μm) | Rz (μm) | Surface quality | Typical processes |
|---|
Achievable Ra by manufacturing process
Full range Typical range