Apps Like Greenheck Toolbox for iPhone and iPad
Calculate fan laws and size ducts
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.
Greenheck Toolbox screenshots
Ranked alternatives
Showing 361–380 of 1,000 ranked alternatives.



iSlipstick
Sam Virgillo
Electronic formula calculators and value converters.
The app provides electronic formula calculators and value converters. It includes Ohm's law, Op-Amp gain, LC circuit, impedance, and resistor calculators, along with metric and imperial unit conversions.

Uniform Flow Light
YamaSoftPLanning,Ltd.
Calculate water channel flow parameters easily.
The app calculates parameters for water channels with constant flow, slope, and shape. It includes calculations for surface width, water area, wetted perimeter, hydraulic radius, and velocity.

DrPhos' Molar Mass
Monte L Helm
Calculate and elemental composition
Calculate and elemental composition for chemical formulas. Input formulas with subscripts, parentheses, and nested groups. Display total and individual element contributions. Perform elemental analysis for problem-solving and educational purposes.

Geometry Cheat Sheet
Neil Shweky
Calculate geometry formulas without math.
The app calculates geometric formulas for users. Users input numbers and the app provides answers for circles, rectangles, triangles, spheres, cylinders, cones, and more.


Ug Calc
Lance Henderson
Calculate Geometric Unsharpness Easily Now
The app calculates Geometric Unsharpness (Ug) for industrial radiographers. Users input distances and source size to determine the Ug value.

Electronics Reference Toolkit
Ha Do Thi Thu
Calculate resistors, voltage, and capacitance
ElecKit provides tools for calculations. Users can calculate resistor values with 4/5 band codes and tolerance. It includes Ohm’s Law functions for voltage, current, resistance, and power.


Herz Stromax R
Aleksandar Jovanovic
HVAC system balancing valve calculator tool.
The app calculates optimal valve presets for HVAC systems. It visually represents operational conditions, replacing manual data sheet calculations.


KlimaKonfigurator!
KlimaShop! GmbH
Calculate room air conditioning needs easily.
The app calculates approximate air conditioning needs for a room. It uses room size, ceiling construction, window area, people, and heat-emitting equipment as input data to determine required cooling capacity in Watts or BTU/h.

Gas Pipe Sizing Calculator
Mr Combi Sales Ltd.
Calculate correct gas pipe sizes easily.
The app helps users select the right size pipes for boiler installations. It calculates the total equivalent length, minimum pipe diameter, and pressure drop for copper, steel, and PE pipes.

Fractions Pro
Intemodino Group s.r.o.
Calculate with fractions and decimals.
The app performs mathematical, engineering, scientific, and technical calculations. It handles fractions, mixed numbers, decimals, and integers with various functions including trigonometric operations and constants.

Electrical Calculation Tools
Kantaben Gorasiya
Calculate voltage, current, and power
Calculate values using Ohm’s Law with inputs for voltage, current, and resistance. Determine power with formulas for watts, amps, and volts. Convert between units like volts, amps, and kilowatts. Store frequently used values for quick access.



ASHRAE DFDB Lite
ASHRAE, Inc.
Calculate pressure loss for duct fittings
Create individual projects with custom input values and results. Calculate pressure loss for specified duct fittings. Access a database of listed fittings for accurate calculations. Save and review project data for analysis.

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