Mechanic Pocket Tools

Mechanic Pocket Tools puts automotive calculators and workshop references in one easy-to-use app. Compare tyre sizes, calculate fuel costs, work out torque wrench settings and check electrical values wherever the job takes you. Built for mechanics, auto electricians, apprentices and DIY car owners, this pocket toolbox includes 12 practical tools. All calculators, reference guides and included images work offline after installation. No account is required. WORKSHOP CALCULATORS • Unit converter: Convert torque, pressure, length, volume, temperature, power, speed and mass. • Tyre size comparison: Compare tyre (tire) diameter, circumference, ride-height changes and the estimated effect on speedometer readings. • Fuel consumption and trip cost: Calculate fuel economy and journey costs using metric, US or UK units. • Electrical calculator: Work with DC voltage, current, resistance and power using Ohm's law. • Torque wrench extension: Calculate adjusted settings for inline extensions and 90-degree crowfoot arrangements. • DC voltage drop: Estimate voltage drop in copper wiring using cable length, current, conductor size and temperature. • Tap and drill sizes: Look up cutting-tap drill sizes and use a separate metric tap-drill approximation. • Gearing and RPM: Estimate engine RPM and road speed using tyre size and gear ratios. PRACTICAL REFERENCE GUIDES • Bolts and threads: Browse metric, UNC and UNF thread references. • Automotive relays: Explore interactive diagrams showing relay terminals and switching arrangements. • Blade fuses: Compare common fuse families, with reference images and selected colour and current-rating information. • Multimeter basics: Follow illustrated guides for common low-voltage automotive DC checks using your own multimeter. MADE FOR EVERYDAY USE • Find tools quickly with search and categories. • Save frequently used tools to Favourites. • Revisit your last 50 saved calculations. • Copy or share calculation results. • Choose metric or imperial preferences. • Switch between light, dark and system themes. • View reference photos and diagrams offline. Keep useful workshop calculations and reference information close at hand with Mechanic Pocket Tools by MechSIT. OFFLINE ACCESS The calculators and reference content work without an internet connection. The app contains ads; advertising and consent services use the internet. Results are estimates or references based on your inputs and the stated assumptions. Always check vehicle and component manufacturer specifications before carrying out work. The multimeter guides require a separate physical meter; the phone does not measure electrical values.