Engineering Calculators
Small, exact tools for the numbers that decide a part. Nothing is a black box.
- Tools
- 3
- Formulas
- 9
- Format
- HTML only
Bend allowance, bend deduction and outside setback for a sheet-metal bend, from thickness, bend angle, inside radius and K-factor.
Convert measured X and Y deviations into a diametral true position, with optional MMC bonus tolerance and a pass/fail against your feature control frame.
Hole and shaft limits, and the resulting clearance or interference, for a nominal diameter and an ISO 286 hole-basis fit.
The chart behind each tool
Every calculator is a shortcut through a reference table. When you need the whole table — or the standard it comes from — go to the chart.
Bend Allowance
Minimum inside bend radius by alloy and temper as multiples of thickness, K-factor against R/t, and K by bending method — with the two conflicting published K sets shown side by side.
True Position
All geometric characteristic symbols with category, datum requirement and a plain-English meaning, flagged for the 2018 withdrawal of concentricity and symmetry, plus the modifier symbols.
Press Fit
Preferred hole-basis fits, IT6–IT11 standard tolerance grades to 120 mm, and full deviation tables for H7/g6, H7/h6, H8/f7, H7/k6, H7/p6 and H7/s6.
Or browse all reference charts.