How do I calculate ISO Fit Calculator (Hole Basis)?

To calculate ISO Fit Calculator (Hole Basis): Enter Nominal diameter, Hole tolerance grade, Shaft tolerance grade. Click Calculate. INDUGRID computes the result instantly using the formula: EI = 0 (H-basis) | ES = EI + IT_grade | Clearance = ei - ES | Interference = EI - es. No registration required.

What units does the ISO Fit Calculator (Hole Basis) calculator use?

The ISO Fit Calculator (Hole Basis) calculator uses the following units: mm. SI units are used by default.

Is the ISO Fit Calculator (Hole Basis) calculator free?

Yes. The INDUGRID ISO Fit Calculator (Hole Basis) calculator is completely free, requires no account or login, and works on desktop and mobile browsers.

Tolerances & Fits

ISO Fit Calculator (Hole Basis)

Calculate upper and lower deviations, actual dimensions and fit type for standard ISO 286-1 tolerances (hole-basis system).

Units:

in LinkedIn

💡Hole-basis system (H-fits) is preferred: the hole tolerance starts at zero (H). Common fits: H7/f6 = running clearance (precision), H7/k6 = transition fit (location), H7/p6 = interference fit (press fit).

EI = 0 (H-basis) | ES = EI + IT_grade | Clearance = ei - ES | Interference = EI - es

Input

Nominal diameter iBasic (nominal) dimension in mm. Must be between 1-500mm for ISO 286.

Hole tolerance grade iHole tolerance grade. H7 is the most common for precision fits.

Shaft tolerance grade iShaft tolerance grade. f6=sliding/running, k6=transition, p6=light press, s6=heavy press.

Result

Hole max (ES) [mm] —

Hole min (EI) [mm] —

Shaft max (es) [mm] —

Shaft min (ei) [mm] —

Fit type —

Max clearance / min interference [mm] —

Min clearance / max interference [mm] —