Engineering · Calculator

Stock allowance calculator.

Illustrative per-side stock allowance from rule-of-thumb factors. This does not establish a purchase size: verify stock tolerance, scale, distortion, workholding, datum cleanup and process sequence before ordering material.

Inputs

Nominal finished dimension (in)Stock conditionMaterial classRequired surface finishHeat treat after rough?

Recommended stock

Allowance per side

—

Total stock dimension

—

(nominal + 2× per-side allowance)

Surface scale removal—

Finish-pass allowance—

Heat-treat distortion—

Send these numbers to a quote →

Per-side allowance for a single feature. For deep pockets, internal walls, or unusual aspect ratios, increase by 25–50%. For 0.0001″-class final tolerance, add another 0.001″ per side for a precision finish pass.

Keep exploring

Related tools & references

Material weight calculator→

Weigh the raw stock you size here.

Thermal expansion stack→

Account for growth between cut and measurement temps.

Heat treatment reference→

Plan grind/finish stock to clean up after treatment distortion.

Material datasheets→

Stock forms and tempers by alloy.

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