Examples
Examples
Try the starting example
- Measured signed height deviations from reference plane (mm)
- 0,0.2,-0.1,0.4
- Reference span (mm)
- 200
- Peak-to-valley deviation (mm)
- 0.5
- RMS reference-plane deviation (mm)
- 0.229129
- Peak-to-valley relative to span (%)
- 0.25
Try another scenario
- Measured signed height deviations from reference plane (mm)
- [0, 0.4, -0.2, 0.8]
- Reference span (mm)
- 200
- Peak-to-valley deviation (mm)
- 1
- RMS reference-plane deviation (mm)
- 0.458258
- Peak-to-valley relative to span (%)
- 0.5
Calculation method
Calculation method
Peak-to-valley deviation (mm)
Max deviation−min deviation relative to supplied reference plane.
RMS reference-plane deviation (mm)
sqrt(mean(deviation²)); reference plane is supplied, not fitted.
Peak-to-valley relative to span (%)
100(max−min)/reference span.
Symbols and units
- a
- Measured signed height deviations from reference plane (mm)
- b
- Reference span (mm)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- Reference plane, measured deviations, dimensions. Returns Flatness deviation summary. All coefficients and observations are user supplied; results describe only the stated mathematical model. Quantities are deterministic calculations from supplied observations and assumptions; no external data is fetched. Supported limits: Finite inputs only; numeric fields bounded as labelled. Lists and JSON records are limited to 256 entries unless a stricter tool bound is stated. No automatic design approval, legal conclusion, treatment recommendation or safety certification. Measured signed height deviations from reference plane (mm): minimum None, maximum 1000000000000.0. Reference span (mm): minimum 1e-12, maximum 1000000000000.0.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.