(javascript required)

## Perimeter Polygon

A+B+C+D+E+F+G+H = Perimeter
Find perimeter or a missing side
Side A:
B:
C:
D:
E:
F:
G:
H:
Perimeter:

## Circumference Circle

(π x D) or (π x R x 2) = Circumference
π = 3.14159265359...
Enter one length
Diameter:
Circumference:

## Area Rectangle

Length x Width = Area
Enter one or two values
Length:
Width:
Area:

## Area Triangle

1/2 x Base x Height = Area
Base is the length of any side.
Height is the distance along a perpendicular line intersecting the opposite angle.
Enter any two values
Base:
Height:
Area:

## Area Circle

(0.7854 x D2) -or- (π x R2) = Area
Enter one value
Diameter:
Area:

## Volume Box

Length x Width x Height = Volume
1 gal = 8.3454 lbs
Enter lengths or one volume
Length ft:
Width ft:
Height ft:
Volume cbft:
Volume cbme:
Gallons H2O:
Pounds H2O:
Liters H2O:

## Volume V-Trough

1/2 x Width x Height x Length = Volume
1 gal = 8.3454 lbs
Enter 3 lengths or 2 lengths + 1 volume
Width ft:
Height ft:
Length ft:
Volume cbft:
Volume cbme:
Gallons H2O:
Pounds H2O:
Liters H2O:

## Volume Cylinder

(0.7854 x D2 x H) -or- (π x R2 x H) = Volume
1 gal = 8.3454 lbs
Enter lengths or one volume
Diameter ft:
Height ft:
Volume cbft:
Volume cbme:
Gallons H2O:
Pounds H2O:
Liters H2O:

## Volume Sphere

4/3 x π x R3 = Volume
1 gal = 8.3454 lbs
Enter one value
Diameter ft:
Volume cbft:
Volume cbme:
Gallons H2O:
Pounds H2O:
Liters H2O:

## gpm / MGD

gpm * 1440 / 1M = MGD
694 gpm = 1 MGD
Enter one value
gpm:
MGD:
ml/min:

## Detention Time

Tank volume / Flow/time = Time
Enter any two values
Volume/flow in same units, gallons or MG
Time in same units, minutes or days
Tank Volume:
Flow/time:
DetentionTime:

Water psi * 2.3067 ft = Head Feet
Enter one value
psi:

## Bernoulli Equation

V2=√(2g(H1-H2+((P1-P2)/(SGpg))+(V1/2g)+HL))
Q = V2 x A x T x F   ** leave 2 values blank !!
SG:
Height-1 ft:
Pressure-1 psi:
Velocity-1 ft/s:
Height-2 ft:
Pressure-2 psi:
Velocity-2 ft/s:
AreaOpen sqin:
Time min:
Factor:
Quantity gal:

## Circular Break Around Pipe

Q = V x A x T x F
V = Bernoulli Equation
Factor = 0.61 for typical flows
Factor = 1 if friction = 0
Leave one value blank
Pipe diameter":
Break width":
Water psi:
Factor:
Leak min:
Loss gallons:

## Hole Break in Pipe

Q = V x A x T x F
V = Bernoulli Equation
Factor = 0.61 for typical flows
Factor = 1 if friction = 0
Leave one value blank
Hole diameter":
Water psi:
Factor:
Leak min:
Loss gallons:

## Rectangular Break Along Pipe

Q = V x A x T x F
V = Bernoulli Equation
Factor = 0.61 for typical flows
Factor = 1 if friction = 0
Leave one value blank
Break length":
Break width":
Water psi:
Factor:
Leak min:
Loss gallons:

## Water Loss Summary

Parts / Total Pumped = Accounted
Enter water volumes in same units
Total pumped:
Metered:
Unmetered:
Leaked:
Other:
Accounted:
% lost:
Amount lost:

## Drawdown / Specific Capacity

Airline Depth to Water Method
Depth = Air line ft - (PSI * 2.3067)
Drawdown = Pumping - Static
SC = Yield / Drawdown
Air line ft:
Psi pump off:
Psi pump on:
GPM yield:
Static depth':
Pumping depth':
Drawdown:
GPM/ft SC:

## Hydrant Flush / Pipe Flow

Q = V x A x T x F
V = D / √(2H/9.80665)
Factor = 0.90 for efficient hydrants
Factor = 1 if friction = 0
Leave one value blank
Diameter":
Height":
Distance ft:
Factor:
Flush min:
Flush gallons:

## Darcy Groundwater Flow

Darcy's Law
Darcy Flux = K(dH/dL)
Velocity = Darcy Flux / p
K = Hydraulic conductivity, i.e. values
p = Effective porosity 1 to 100%
Q = VA
Leave one value blank
Height delta ft:
Length delta ft:
Soil K µm/s:
Soil porosity%:
Darcy µm/s:
Velocity ft/hr:
Area sq ft:
Time hours:
Gallons:

## Percentage

Part / Whole * 100 = Percentage
Enter any two values
Part:
Whole:
Percentage %:

## Concentration

0.001 ml/L * 1 SG = 1 mg/L = 1ppm
Enter one value + Specific Gravity
ml/L:
mg/L:
ppm:
gr/gal:
Percentage:
SG:

## Davidsons Dosage

MGD * 8.3454 * mg/L = Lbs/day
Enter any two values
MGD:
mg/L:
Lbs/Day:

(MGD * 8.3454 * mg/L) / sqft = Lbs/day/sqft
Enter any three values
MGD:
mg/L:
Area sqft:
Lbs/Day/sqft:

## Concentrate to Concentrate

C1 * V1 = C2 * V2
Enter any three values
C1:
V1:
C2:
V2:

## Chlorine Standard Cutting 334.0

Enter three values, ** less % error
Target mg/L:
Stock mg/L:
Final vol mL:
Stock vol mL:
Injection mL:
Injection** mL:
Total vol mL:
Injection #:
Tested mg/L:
-15% mg/L:
+15% mg/L:

## Temperature

Fahrenheit - 32 * 5/9 = Celsius
Enter one value
Fahrenheit:
Celsius:

## Weight

1 pound = 0.4536 kilograms
Enter one value
Pounds:
Kilograms:
Gallons H2O:
Cubic ft H2O:
Liters H2O:
Cubic me H2O:

## Length

1 ft = 0.3048 meters
Enter one value
Inches:
Feet:
Miles:
Millimeters:
Centimeters:
Meters:
Kilometers:

## Area

1 acre = 43,560 sqft
Enter one value
Sq feet:
Acres:
Sq miles:
Sq meters:
Hectares:
Sq Kilometers:

## Volume

1 gallon = 3.78541 liters
Enter one value
Cubic feet:
Gallons H2O:
Pounds H2O:
Cubic meters:
Liters H2O:

## Horsepower and Efficiency

hp=(gpm x hd ft x SG)/(3,960 x Eff%)
Enter two of gpm, head ft, horsepower
gpm:
SG:
Efficiency %:
Horsepower:
Price \$/KWH:
Hours:
Total Cost \$:

## F/M Ratio

FM = Inflow (BOD mg/L x 8.3454 x MGD) /
Tank (MLVSS mg/L x 8.3454 x MG)
Enter all but one value
Infl BOD mg/L:
Infl MGD:
MLVSS mg/L:
Tank MG:
F/M Ratio:

## Sludge Volume Index

SVI = (Settled ml/L x 1000) / (MLVSS mg/L)
Enter two of Settled, MLVSS, and SVI
Settled ml/L:
-or- Settled %:
MLVSS mg/L:
SVI:

## Suspended Solids

mg/L=(gr x 1,000 mg/g x 1,000 ml/L)/ml
Enter any two values
Solids gram:
Sample ml:
SS mg/L:
ppm:
Percentage %:

## Sludge Age

SA = (MLVSS mg/L x 8.3454 x MG) /
(ISS mg/L x 8.3454 x MGD)
Enter all but one value
Infl SS mg/L:
Infl MGD:
MLVSS mg/L:
Tank MG:
Sludge Age:

## Mean Cell Residence Time

SA=(MLVSS lbs)/(Efflu SS lbs + Wasted)
Enter all but one value
MLVSS mg/L:
Tank MG:
Efflu SS mg/L:
Efflu MGD:
Waste mg/L:
Waste GPD:
MCRT:

## Wasting Rate

Waste GPD =
((Actual - Target) x MG) / Waste mg/L
Enter all but one value
Act MLSS mg/L:
Tar MLSS mg/L:
Tank MG:
Waste mg/L:
Waste GPD:

## Circular Break Sewer Inflow

Q = V x A x T x F
V = Bernoulli Equation
Factor = 0.3 proposed, but very variable
Factor = 1 if friction = 0
Leave one value blank
Pipe diameter":
Break width":
Water depth":
Factor:
Inflow min:
Inflow gallons:

## Hole Break Sewer Inflow

Q = V x A x T x F
V = Bernoulli Equation
Factor = 0.3 proposed, but very variable
Factor = 1 if friction = 0
Leave one value blank
Hole diameter":
Water depth":
Factor:
Inflow min:
Inflow gallons:

## Rectangular Break Sewer Inflow

Q = V x A x T x F
V = Bernoulli Equation
Factor = 0.3 proposed, but very variable
Factor = 1 if friction = 0
Leave one value blank
Break length":
Break width":
Water depth":
Factor:
Inflow min:
Inflow gallons:

## Rainfall Inflow Estimator

Enter drain sq ft or miles &
two of rain, percent, & inflow
Drain sq feet:
Drain sq mile:
Rainfall inch:
% collected:
+Inflow MG:

## NPDES Flow Exceedance

Enter all values below
Design MGD:
Avg Dry MGD:
Rain +MGD:
Other +MGD:
Exceed MGD:
Design Use %:

## Process Efficiency

Enter amounts in same units
Influent:
Effluent:
Efficiency:

## Chemical / Gallons

Enter gallons & ppm, sol% if needed
Water gal:
Needed ppm:
Chem lbs:
Chem sol %:
Chem sol SG:
Solution L:
Solution gal:

## Chemical / Cubic Tank

Enter dimensions & ppm, sol% if needed
Length ft:
Width ft:
Height ft:
Water gal:
Needed ppm:
Chem lbs:
Chem sol %:
Chem sol SG:
Solution L:
Solution gal:

## Chemical / V Trough Tank

Enter dimensions & ppm, sol% if needed
Length ft:
Width ft:
Height ft:
Water gal:
Needed ppm:
Chem lbs:
Chem sol %:
Chem sol SG:
Solution L:
Solution gal:

## Chemical / Cylinder Tank

Enter dimensions & ppm, sol% if needed
Diameter ft:
Height ft:
Water gal:
Needed ppm:
Chem lbs:
Chem sol %:
Chem sol SG:
Solution L:
Solution gal:

## Chemical Pump Size

Enter all values below
Water gpm:
Dosage ppm:
Solution %:
Solution SG:
Gallons/day:
Gallons/hr:
Gallons/min:
ML/minute:

## Rate Study

Enter ANNUAL values in same units
Operating Exp:
Loan Exp:
Capital Exp:
Reserve Exp:
TOTAL EXP:
TOTAL REV:
TOTAL P&L:
Customers:
1000g Pumped:
1000g Sold:
Water Loss %:
Monthly Bill:
1st 1000g Mon:
Next 1000g: