Calculators that actually compute.
Free engineering calculators for everyday manufacturing decisions — compare materials, estimate part weight, work out sheet-metal bends and convert surface-finish values. All results compute instantly from real data, right in your browser.
Material comparison
Select two or more materials to compare their engineering properties side by side. Data is pulled from our material database.
Part weight calculator
Estimate the weight of a solid part from its material and dimensions.
Sheet-metal bend calculator
Work out bend allowance, bend deduction and flat-pattern length for a single bend.
Flat = Leg A + Leg B − bend deduction. Verify against your shop's measured K-factor.
Surface roughness converter
Convert between Ra in µm and µin, and estimate Rz. Learn the difference →
Rz ≈ Ra × 5 is a rough guide only; the true ratio depends on the surface profile. Specify the parameter your part needs.
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