Fan Law Calculator allows users to input rpm, cfm, static pressure, and horsepower. Modifying one value recalculates the others. Ductulator helps size HVAC ducts by inputting shape, dimensions, air temperature, elevation, and roughness.
by Greenheck Fan Corporation★ 3.03 ratingsUtilitiesFreeData updated 2026-09-08
SHEET METAL CONTRACTORS NATIONAL ASSOCIATION, INC.
Estimate ductwork air leakage easily.
The app estimates air leakage from ductwork for engineers, architects, designers, and contractors. It determines pass/fail marks for Duct Air Leakage Tests and combines ductwork sections to calculate total allowable leakage.
Calculate bullet trajectories using a Modified Point Mass Solution with 4 Degrees Of Freedom. Input ballistic coefficients or drag coefficients from Doppler radar analysis. Adjust for wind, elevation, and distance.
Control and monitor DG-1000, DG-700, or DG-8 pressure gauges wirelessly via Bluetooth or WiFi. Capture and store readings. Share readings via email or cloud apps like Google Drive and Dropbox. Display readings in various formats.
Calculate resolutions and aspect ratios by inputting one dimension and a ratio. Adjust ratios with a tap. Save calculated resolutions for future reference. Scale resolutions while maintaining aspect ratio.
Calculate investment growth with a . Input decimal rates and choose from seven compounding frequencies. Add monthly contributions to track potential growth over time.
Calculate BTU/h capacity and determine recommended equipment types. Convert between BTU, kW, Kcal, and Tons. Check current price estimates and compare inverter versus conventional energy consumption. Unlock advanced features through in- purchases.
Plan tile layouts by inputting dimensions and selecting tile sizes. Drag and rearrange tiles to optimize placement. View dimensions of cut tiles and calculate total and cut tile counts. Export layout for reference.
The app calculates duct sizes for air conditioning using the constant-pressure method. Users input wind amounts to determine duct size, disadvantageous pressure, and wind velocity for blueprints and drawings.
Calculate electrical values using . Input voltage, current, or resistance to find missing variables. Supports calculations for series and parallel circuits. Includes unit conversion for volts, amps, and ohms.
Calculate volume for slabs, footings, columns, walls, and stairs in cubic yards, feet, or meters. Estimate needed, determine weight and bag requirements. Calculate rebar spacing and truckloads.
Calculate cutting speeds and feeds for High Speed with support for ISO materials and adaptive data based on workpiece properties. Adjust parameters via touchscreen for real-time updates. Choose metric or US units. Set maximum RPM limits.
The app provides a searchable database of Iowa Criminal Code and Traffic Law for law enforcement professionals. It includes tools like a fine compendium, speeding citation calculator, and court date finder, with no internet access required.
Calculate and man-hours needed for a room by inputting wall dimensions and subtracting areas for windows and doors. Estimate volume based on wall surface area and coverage rate. Save calculations and view detailed breakdowns.