Calculator
ISO 2768 general tolerances
Permissible deviation of a dimension, chamfer or angle by class f, m, c or v, with the standard’s full tables.
For engineers, technicians and buyers
Free tools for manufacturing
Calculators and templates useful day to day, to prepare a drawing, check a dimension or scope a need before asking for a quote. No sign-up, right in your browser.
- Free, no sign-up
- Formulas and tables shown
- Works on mobile
The tools
Calculator
Part mass calculation
Plate, round bar, tube, hexagon: volume and mass of the raw stock by material, quantity and density.
Calculator
Spindle speed and feed rate
Milling and turning: spindle speed N and feed rate Vf from the cutting speed and diameter.
Converter
Roughness converter
Ra in micrometres, ISO 1302 N grades and microinches, with the processes that achieve each range.
Generator
Specification generator
Write a clear specification in 10 minutes, then print it or publish it on Meaflow.
Glossary
Manufacturing glossary
Processes, materials, treatments, quality and purchasing: the terms of industrial manufacturing explained simply.
Why these tools
Tools that are useful on their own, with or without Meaflow: no account to create, no advertising, results you can check.
Free, no sign-up
No account to create: open the tool, enter your values, note the result. The calculation updates with every entry.
Formulas and tables visible
The ISO 2768-1 tables, the N roughness grades and every formula are displayed in full: you can check everything.
Your values stay with you
Calculations are done in your browser. The dimensions you enter are neither sent nor saved.
Built for the shop floor
Engineers, technicians, buyers: simple tools to prepare a drawing, check a dimension or scope a need before asking for a quote.
Reliable orders of magnitude, not a guarantee. These tools replace neither the standard itself, nor the data from your material or tooling supplier, nor your workshop’s advice. If in doubt, check the source.
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Guides to go further
Machining tolerances: ISO 2768, fits and dimensioning
ISO 2768 general tolerances, ISO 286 fits, ISO 1101 geometric tolerancing, Ra roughness: read a drawing and dimension sensibly to control the cost of a machined part.
Writing a manufacturing specification: method and template
What a workshop needs to know to quote and make your part: a method in a few points, a ready-to-copy template and common mistakes to avoid.
Aluminium, stainless steel, steel, engineering plastics: choosing the right material for your parts
Aluminium 6082 or 7075, stainless 304L or 316L, POM or PA6: the criteria for choosing the right material, a comparison table and the effect of this choice on price and lead times.
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