Tolerance Helper

Precision engineering tool for ISO tolerance calculations. Quick search, interactive calculations, and multiple unit systems for machinists and engineers.

Tolerance Calculator Tolerance Calculator is a comprehensive engineering reference tool for mechanical design and precision manufacturing professionals. This app simplifies the process of calculating dimensions with ISO standard tolerances for both holes and shafts. Key Features Comprehensive Tolerance Reference

Complete reference table of engineering tolerances Support for both hole and shaft designations (e.g., H7, h7) Spans all standard dimensional intervals

Easy Tolerance Calculation

Calculate minimum, maximum, and average dimensions Enter a nominal dimension and view all tolerance limits instantly Results displayed clearly with color-coded indicators Copy results to clipboard with a single tap

Powerful Search and Filtering

Quick search for specific tolerance designations Filter by hole or shaft tolerances Recent searches history for faster access Customizable tolerance filter to show only designations you need

Multi-unit Support

View tolerances in millimeters (mm) Convert to inches (in) with proper precision Convert to micrometers (μm) for precision work

User-Friendly Interface

Intuitive navigation with tolerance table Clean, engineering-focused design Clear color coding: blue for holes, green for shafts Clickable cells for instant calculations

Accessibility Features

Dark mode support for low-light environments Responsive layout for phones and tablets Support for both portrait and landscape orientations

Localization

English and Russian language support International engineering symbols Professionally translated interface

Perfect For

Mechanical engineers CNC machinists Manufacturing technicians Quality control specialists Engineering students Technical designers Precision fabricators

Tolerance Calculator is the essential pocket reference for anyone working with precision mechanical parts. Calculate proper fits and clearances accurately without the need for paper tables or complex formulas. Download now and simplify your engineering calculations!