# Calculators

Our calculator tools streamline calculations that are time-consuming to perform by hand, but not so complicated as to necessitate using a specialized software program. By embedding the relevant formulas directly into Excel workbooks, these calculators enable you to enter input data and quickly get the answer you seek within a software program that you already use every day. Direct links to the source content and additional related material are provided in the spreadsheets for all calculations.

## Available Spreadsheet Calculators

- Activated Sludge Aeration Tank Calculations
- Analysis of a Cantilever Beam
- Analysis of a Fixed-Fixed Beam
- Analysis of a Propped Cantilever Beam
- Analysis of a Simply Supported Beam
- Analysis of A.C. and D.C. Circuits - Basic Calculations
- Antennas and Transmission Lines - Basic Calculations
- Compressibility Factor Calculations
- Compressible (Fanno Flow) of Air in a Pipe
- Compressible Flow of Air in Non Circular Ducts
- Continuous 2-span Beam Calculations
- Detention Pond Routing by the Storage Indication Method
- Dissolved Air Flotation Design Calculations
**Now Available!** - Field Oxygen Transfer Efficiency and Aeration Diffuser Calculations
- Forced Convection Heat Transfer Coefficients
- Gas Flow Orifice Meter Calculations
- Incompressible Annulus and Duct Flow Calculations
- Incompressible Flow in Pipes and Channels
- Incompressible Orifice Flow Meter Calculations
- Inductance, Capacitance, Resonance and Time Constants - Basic Calculations
- Lime Soda Water Softening
- Liquid-Liquid Extraction Solvent Screening
- MBBR Nitrification-Denitrification Calculations
- MBBR Wastewater Treatment Basin Sizing and Aeration Calculations
**Updated!** - Minimum Required Pipe Wall Thickness and Maximum Allowable Working Pressure (MAWP)
**Now Available!** - Natural Convection Heat Transfer Coefficients
- Natural Gas Pipeline Flow Calculations
- Non-Uniform Flow Surface Profiles
- Overhang Beam Calculations
- Partially Full Pipe Flow Calculations
- Peak Stormwater Runoff Calculation with the Rational Method
- Reinforced Concrete Beam Deflection
**Now Available!** - Reinforced Concrete Columns
**SBR Wastewater Treatment Design Calculations**- Sharp Crested Weir
- Stress Transformation Calculations
- Thermal Design of Double Pipe Heat Exchangers
- Uniform Open Channel Flow (Manning Equation)
- Venturi Meter Calculations

## Tutorials for Spreadsheet Calculators

- Open Channel Flow Calculations with the Manning Equation Using Excel Spreadsheets
- Partially Full Pipe Flow Calculations Using Excel Spreadsheets
- Pipe Flow/Friction Factor Calculations Using Excel Spreadsheets

## Contributors

- Harlan Bengtson, Ph.D., P.E., Former Dean of Engineering, Southern Illinois University Edwardsville
- Mustafa Mahamid, Ph.D., S.E., P.E., F.SEI, F.ASCE, Clinical Associate Professor of Civil Engineering, University of Illinois at Chicago
- Henry V. Mott, Ph.D., P.E., Professor Emeritus, SD School of Mines and Technology, Professor of Hydrology, St. Cloud State University
- William Prudhomme, B.S.E.E., Principal, XL Technologies, Inc.
- Mark Rossow, Ph.D., P.E., Former Chairperson of Civil Engineering, Southern Illinois University Edwardsville