Calculates air volume, pressure loss, velocity, and duct size for rectangular or round ducts. Supports both imperial and metric units. Users input values to determine required dimensions and system performance.
by Steven Ramsay★ 4.824 ratingsUtilities$7.99Data updated 2026-09-08
Calculate refrigerant charges for systems using built-in formulas. Input system parameters to determine correct levels for R-22, R-410A, R-32, and other refrigerants. Save and export calculation results for record-keeping.
Calculate materials for and brickwork projects. Estimate blocks, bricks, mortar, concrete, and gravel needed. Input wall dimensions in various units. Use calculators for area, volume, and retaining walls.
Calculate dimensions by converting circular to rectangular equivalents. Determine ventilation parameters including diameter, airspeed, airflow, and dynamic pressure. Compute pressure drop for straight sections and systems.
Take photos and add measurements with arrows to save object dimensions. Adjust scale using pinch zoom and magnifier view. Save photos with measurement data and share them with others. Supports both imperial and metric units.
Calculate metal weights with support for multiple metals, shapes, and units in both metric and imperial systems. Perform offline calculations without background processes. Save settings and favorite calculations.
This app offers 458 units across 22 dimensions, including length, volume, and weight. It serves as a general-use calculator for converting between different unit sets.
Calculate dimensions and pressure loss for 7 materials. Solve linear and rolling offsets, cutbacks, and other job site equations. Convert units and store standard data for quick access.
Calculate measurements in feet, inches, and fractions. Convert between units and perform complex calculations. Store frequently used values and recall previous entries. Adjust for slope and pitch. Export results to email or cloud storage.
Converts between 160 currencies and 350 physical . Users can save favorite conversions for quick access. Offline exchange rates are updated every half-hour and stored if successful.
Calculate ballistic trajectories with detailed data including 4000 cartridges and 3300 reticles. Visualize trajectories, compare different cartridges, and adjust for barometric pressure, altitude, temperature, and wind.
Convert across 12 categories including area, currency, data, distance, temperature, and time. Swap by pressing a button on the keypad. View live currency updates for 155 world currencies every 15 minutes. Supports iPad Split View.
Convert units across 20+ categories including currency, area, temperature, and mass. Switch between 300+ units. Input values and instantly see converted results. Save frequently used conversions. Share converted values via copy-paste.
Calculate material needs for patios using seven estimators: concrete slab, pavers, paver base, polymeric sand, sand & gravel, area, and volume. Input dimensions in inches, feet, yards, centimeters, or meters.
Provides tools to compute parameters like pressure, flow rate, and viscosity. Users can switch between USCS and SI units. Features include calculating buoyant force, hydraulic radius, and density. Supports civil engineering and dynamics calculations.