Enter a nominal diameter for a hole or shaft and select a grade to view upper and lower tolerances. Calculate tolerances for diameters up to 500 mm in metric or 19.685 inches in imperial. Display values based on ISO 286 standards.
by gary davies★ 5.01 ratingsProductivity$0.99Data updated 2026-09-06
Calculate gas rates for Imperial and Metric meters up to 16 cubic metres. Input meter readings to determine ratings. Email results directly from the . Track and record gas service data for engineers and installers.
Add as all-day calendar events with one tap. Edit, delete, or move events between calendars. Sync with iCal, Google, Outlook, and iCloud. Choose to include country flags. Select specific and years to add.