Environment Calculators
Ambient Noise Level Calculator
Arithmetic Mean Temperature Difference (AMTD) Calculator
Air Flow Rate (Mass Flow) Calculator
Air Flow Rate (Time-Based) Calculator
Actual value of Super-Heated Steam Flow Calculator
Air Pollutant Concentration Calculator
Air Changes per Hour (ACH) Calculator
Aeration Tank Volume Calculator
Boiler Blowdown Rate Calculator
Boiler Efficiency Calculator
Bernoulli's Equation With Constant Potential Energy Terms Calculator
BOD (Biochemical Oxygen Demand) Exertion Calculator
Breakthrough Time Calculator
Biomass Microbial Growth Calculator
Biomass Substrate Utilization Rate Calculator
Biomass Concentration (Xr) Calculator
Buoyancy Flux Parameter (F) Calculator
Carnot Efficiency Calculator
Carbon Footprint Efficiency Calculator
Cost of Fuel Saved by Returning Condensate Calculator
Cost of water Saved by Returning Condensate Calculator
Cost of Effluent Saved by Returning Condensate Calculator
Corrosion Rate Calculator
Cyclone Collection Particle Removal Efficiency Calculator
Cyclone 50% Collection Efficiency for Particle Diameter Calculator
Cyclone Effective Number of Turns Approximation Calculator
Continuity Equation Calculator
Cooling Load Temperature Difference (CLTD) Calculator
Chlorine Contact Time Calculator
Carman-Kozen Head Loss & Friction Factor Calculator
Chick’s Law: Microbial Disinfection Calculator
Chemical Equilibrium Calculator
CMFR (Completely Mixed Flow Reactor) BOD (Biochemical Oxygen Demand) Removal Calculator
Combined Conduction and Convection Calculator
Digester Capacity (V) Calculator
Dynamic Viscosity Calculator
Dissolved Oxygen (DO) Deficit (Streeter-Phelps Model) Calculator
Decreasing-Rate-of-Increase Growth Calculator
Daughter Product Activity Calculator
Darcy-Weisbach Head Loss Calculator
Environmental Impact Carbon Footprint Calculator
Energy Requirement For A Non-Flow Application Calculator
Energy Consumption Calculator
Exposure Level (Concentration) Calculator
Energy Balance Between Steam And Secondary Fluid Of A Non-Flow Process Calculator
Energy Balance Between Steam And Fluid Of A Flow-Type Application Calculator
Equal Percentage Valve Lift Calculator Based on Relative Flow
Equal Percentage Valve Lift Calculator Based on Relative Kv
Environmental Damage Frequency (ENDF) Calculator
Environmental Incident Rate (EIR) Calculator
Electrostatic Precipitator Efficiency Calculator
Exponential Population Growth Calculator
Effective Half-Life Calculator
Entering Coil Conditions (Ventilation Airflow) Calculator
Elevation Head Loss Calculator
Energy Consumption per Person per Year Calculator
Flash Steam Calculator
Friction Factor Calculator (SI-Based)
Friction Factor Calculator (Imperial-Based)
Friction Factor Calculator (Reynolds-Number)
Fracture Conductivity Calculator
Freundlich Isotherm Calculator (Adsorption Capacity Calculator)
Food to Microorganism (F/M) Ratio Calculator
Freezing Point Depression Calculator
Fluid Flow Mass Velocity Calculator
Gaussian Air Pollutant Dispersion Calculator
Gas Flux Calculator
Gas Phase Analyte Concentration Calculator
Gas Buoyancy Calculator
Heat Transfer Thermo Flow Calculator
Heat Transfer Rate Calculator (Condensing Steam)
Heat Transfer Thermo Resistance Calculator
Heat Transferred By Condensing Steam Calculator
Heat Exchanger Temperature Design Constant Calculator
Half-Life Decay Calculator
Hazen-Williams Hydraulic Flow Velocity Calculator
Hardy Cross Flow Correction Calculator (Δd)
Hardy Cross Head Loss Calculator
Hardy Cross Flow Update Calculator
Heat Gain from Lighting Calculator
Heat Gain from Ventilation Calculator
Height Calculation for Drain Pipe Slope
Height of Soak Pit Based on Volume Calculator
Horizontal Settling Velocity (vh) Calculator
Head Loss through Clean Flat Bar Screens Calculator
Head Loss through Fine Screens Calculator
Incineration DRE Calculator
Kinematic Viscosity Calculator
Kiln Residence Time Calculator
Kirschmer’s Head Loss (h) Calculator
Log Mean Temperature Difference (LMTD) Calculator
Liquid Flow Rate vs. Pressure Drop Calculator
Latent Heat Gain from People Calculator
Latent Heat Gain from Infiltration Calculator
Loading Rate Hydraulic Retention Time (HRT) Calculator
Loading Rate Specific Substrate Utilization Rate Calculator
Lapse Rate Calculator
Liquid Film Coefficient (KL) Calculator
Mass Flow Rate From Velocity Calculator
Mean Steam Consumption Rate for a Flow-Type Application caluculator (1)
Mean Steam Consumption Of A Flow-Type Application Calculator (2)
Mean Steam Flow Rate To A Storage Calorifier Calculator
Maximum Allowable Concentration (MAC) Calculator
Mass Flow Rate from volumetric flowrate Calculator
Metal Loss Calculator
Municipal Water Quantity Estimator Calculator
Maximum Pollutant Concentration Calculator
Monod Kinetics - Substrate Limited Growth Calculator
Manning’s Formula For Hydraulic Flow Velocity Calculator
Mean Cell Residence Sludge Retention Time (SRT) Calculator
Mass of Waste Activated Sludge Calculator
Minor Losses (Fittings) Calculator
Maximum Plume Concentration Calculator
Mass Transfer Rate Calculator
Molar Humidity Calculator
Net Microbial Growth Rate Calculator
Overburden Pressure Calculator
Oxygen Requirement O2 Calculator - Activated Sludge Process
Oxygen Transfer Under Field Conditions Calculator
Pressure Drop Across a Valve In A Liquid Calculator
Population Projection Calculator
Percent Growth Calculator
Psychrometric Mixed Air Temperature Calculator
Pressure Drop Calculator (Darcy-Weisbach)
Pipe Flow Velocity Calculator
Pipe Friction Factor Calculator
Pipe Diameter Sizing Calculator
Power Required (kW) Calculator
Plug Flow Biochemical Oxygen Demand (BOD) Removal (Effluent BOD) Calculator
PPM to mg/m³ Conversion Calculator (Air Pollution)
Plume Rise Estimation Calculator (Holland’s Equation)
Percentage of Saturation (Humidity Ratio) Calculator
Plume Rise Height (ΔH) Calculator Under Stable & Calm Conditions
Plume Rise Height (ΔH) Calculator In Large Flow Rate
Plume Rise Height (ΔH) Calculator for Non-Buoyant Plumes
Pitot Tube Velocity Calculator
Recycling Carbon Footprint Savings Calculator
Recycling Impact Calculator
Rankine Efficiency Calculator
Relative Pipe Roughness Calculator
Ratio and Correlation Growth Calculator
Rapid Mix & Flocculator Design Calculator
Reverse Osmosis (Osmotic Pressure Calculator)
Required Ventilation Rate Calculator For Indoor Air Quality
Reynolds Flow Predictor Calculator
Retention Time in Settling Zone (t) Calculator
Rankin's Equation - Filter Efficiency Calculator
Relative Saturation (Humidity) Calculator
Steam Flow Rate For A Steam Injection Process Calculator
Specific Volume Of Wet Steam Calculator
Steam Condensing Rate For Horizontal Pipes In Still Air Calculator
Steam Condensing Rate For Air Heating Equipment Calculator
Steam Running Load To Keep A Steam Maintain Calculator
Steam Injection Required To Power A Steam Deaerator Calculator
Steam Storage Capacity Of An Accumulator Calculator
Speed of Sound in Steam Calculator
Sound Power Level At The Safety Valve Outlet Calculator
Sound Pressure Level At The Safety Valve Outlet Calculator
Steam Temperature At Any Load Calculator
Secondary Fluid Inlet Temperature At Any Load Calculator
Secondary Inlet Temperature At Any Load Calculator
Stall Load For A Variable Flow Secondary Calculator
Short-Term Corrosion Rate (STCR) Calculator
Soil Landfill Cover Water Balance Calculator
Shaded Wall Heat Conduction Calculator
Solar Heat Gain Through Glass Calculator
Sensible Heat Ratio (SHR) Calculator
Supply Airflow Calculator
Settling Equation (General-Spherical) Calculator
Settling Velocity Calculator (Stokes' Law)
Sensible Heat Gain from People Calculator
Settling Net Force Calculator
Settling Drag Force Calculator
Salt Flux Through the Membrane Calculator
Settling Terminal Velocity Calculator
Settling Spherical Particle Volume Calculator
Settling Projected Area of a Spherical Particle Calculator
Settling Reynolds Number Calculator
Soak Pit Volume Calculator
Sludge Retention Time (SRT) And Specific Substrate Utilization Rate Calculator
Settling Overflow Rate (q₀) Calculator
Sedimentation Tank Volume (V) Calculator
Sedimentation Tank Surface Area (A) Calculator
Sedimentation Tank Dimensions Calculator
Sedimentation Overflow Rate Calculator
Scouring Velocity (V) Calculator - Schield’s Formula
Sludge Recirculation Rate (Qr) Calculator
Solubility Product (Ksp) Calculator
Stability Parameter (S) Calculator
Thermodynamic Temperature Calculator
Travel Carbon Footprint Calculator
Thermal Transmittance (U) Calculator (From Thickness & Conductivities)
Thermal Transmittance (U) Calculator (From Thermal Resistances)
Thermal Transmittance (U-Value) Calculator
Thermal Resistivity From Conductivity Calculator
TDS Calculator (Density Method)
TDS (Total Dissolved Solids) Conductivity Calculator
Transient Mass Balance Calculator
Transition Flow General Velocity Calculator
Total Height of Soak Pit Calculator
Two-Phase Flow Parameter Calculator
Threshold Limit Value (TLV) Calculator for Silica Dust
Time to Settle (t₀) Calculator
U-Factor Calculation for Walls
Vapor Pressure Calculator
Volumetric Flow Rate Calculator
Volumetric Flowrate From The Shedding Frequency Calculator
Volumetric Flow Through An Equal Percentage valve Calculator
Vegan Footprint Calculator
Vertical Settling Velocity (vt) Calculator
Van't Hoff Reaction Isochore Calculator
Wet Steam Enthalpy Calculator
Waste Segregation Efficiency Calculator
Water Mass to Volumetric Flowrate Converter Calculator
Water Demand Fluctuation Calculator
Water Pollutant Load Calculator
Water Flux Through the Membrane Calculator
Waterflux Ultrafiltration calculator
Wind Profile Calculator
Weir Flow Rate (Q) Calculator
