Convert time to and from units. Track time in without time zones. Set and measure durations using a universal zero point. Calculate time intervals in format.
by Malcolm Teas★ 4.416 ratingsUtilitiesFreeData updated 2026-09-13
Convert units across 16 categories with instant accuracy. Switch between hundreds of units for length, weight, temperature, and more. Calculate conversions for cooking, engineering, travel, and study.
Measure by matching the inner edge to the 's white circle. Adjust the slider to align the diameter or circumference. View results in metric or imperial units, including US, Canadian, and Australian sizing systems.
Access product specifications for air conditioning and refrigeration equipment. Search by model number, view detailed technical data, and download documentation. Login with existing OPI credentials or create a new account.
Calculates distances between map points and areas of non-overlapping polygons. Users can switch between metric and imperial units. Coordinates are displayed in decimal or degrees, minutes, and seconds.
Measure size using metric or imperial units, choose diameter or circumference, and use visual guides for accurate measurement. Supports sizes for USA, Australia, UK, Europe, Japan, and China. Share size on social networks.
Calculate quantity, boxes needed, and estimated cost for floors or walls. Account for grout gaps and input dimensions or pre-known sizes. Provide cost estimates based on material prices.
Find dimensions and get recommendations for new . Compare wheels by offset and width. View visual comparisons and measure deviations. Identify factory size for your vehicle.
Estimates materials for installation including sheets, mud, tape, and screws. Calculates using imperial or metric units. Sends results via text or email.
Convert units across categories like length, area, and temperature. Perform simultaneous conversions and customize preferences. Copy converted values to the clipboard for quick use.
Monitor speed and direction with a in metric or imperial units. Display major road and highway speed limits. Highlight current speed in yellow for slight excess and red for significant excess. Supports landscape and portrait orientations.
Perform complex calculations with customizable formulas and equation solving. Save and reuse calculations. Convert units and manage multiple profiles. Export results and access advanced functions like matrix operations and statistical analysis.
Track routes, find waypoints, and navigate offline
Navigate outdoors with offline GPS maps and real-time augmented reality. Track waypoints and custom locations. Use a gyrocompass, speedometer, altimeter, and inclinometer. Find celestial bodies and measure angles.