MetroX ISO Fit Calculator

MetroX is an ISO fit calculator built for engineers who need answers fast. This ISO fit calculator delivers ISO 286 limits & fits for holes and shafts in seconds—so you can make confident choices in design, machining, and inspection. What you can do (ISO 286 limits & fits) • Calculate hole and shaft limit sizes (min/max) from a nominal size and fit designation (e.g., H7/g6, H6/h5, F6/f6). • See minimum and maximum clearance (or interference) instantly. • Classify the fit type automatically: clearance, transition, or interference. • Compare multiple fits quickly while iterating designs or checking drawings. Typical use cases • Mechanical design: validate tolerances before releasing drawings and avoid costly rework. • Machining & tooling: quick shop-floor checks for hole limits, shaft limits, and expected clearance. • Metrology & inspection: verify parts against ISO 286 limits during incoming/outgoing QC. • Education & reference: learn how ISO fits behave across sizes and tolerance grades. Why MetroX • Fast: minimal inputs, instant results. • Practical: focuses on the numbers you actually need (limits + clearance/interference). • Reliable workflow: forward calculation + reverse fit selection. FAQ Does it support clearance and interference fits? Yes—MetroX calculates min/max clearance or interference and classifies the fit type. Can I start from a target clearance? Yes—use the reverse workflow to pick a fit based on your target range. Who is it for? Mechanical engineers, machinists, toolmakers, inspectors, and students working with ISO 286. Download MetroX and speed up your fit decisions today.