Perimeter Polygon
A+B+C+D+E+F+G+H = Perimeter
Find perimeter or a missing side
Circumference Circle
(π x D) or (π x R x 2) = Circumference
π = 3.14159265359...
Enter one length
Area Rectangle
Length x Width = Area
Enter one or two values
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
Area Circle
(0.7854 x D2) -or- (π x R2) = Area
Enter one value
Volume Box
Length x Width x Height = Volume
1 gal = 8.3454 lbs
Enter lengths or one volume
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
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
Volume Sphere
4/3 x π x R3 = Volume
1 gal = 8.3454 lbs
Enter one value
gpm / MGD
gpm * 1440 / 1M = MGD
694 gpm = 1 MGD
Enter one value
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
Pressure / Head
Water psi * 2.3067 ft = Head Feet
Enter one value
Bernoulli Equation
V2=√(2g(H1-H2+((P1-P2)/(SGpg))+(V1/2g)+HL))
Q = V2 x A x T x F ** leave 2 values blank !!
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
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
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
Water Loss Summary
Parts / Total Pumped = Accounted
Enter water volumes in same units
Drawdown / Specific Capacity
Airline Depth to Water Method
Depth = Air line ft - (PSI * 2.3067)
Drawdown = Pumping - Static
SC = Yield / Drawdown
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
Darcy Groundwater Flow
Darcy Flux = K(dH/dL)
Velocity = Darcy Flux / p
K = ,
p = Effective 1 to 100%
Q = VA
Leave one value blank
Percentage
Part / Whole * 100 = Percentage
Enter any two values
Concentration
0.001 ml/L * 1 SG = 1 mg/L = 1ppm
Enter one value + Specific Gravity
Davidsons Dosage
MGD * 8.3454 * mg/L = Lbs/day
Enter any two values
Davidsons Loading
(MGD * 8.3454 * mg/L) / sqft = Lbs/day/sqft
Enter any three values
Concentrate to Concentrate
C1 * V1 = C2 * V2
Enter any three values
Chlorine Standard Cutting 334.0
Enter three values, ** less % error
Temperature
Fahrenheit - 32 * 5/9 = Celsius
Enter one value
Weight
1 pound = 0.4536 kilograms
Enter one value
Length
1 ft = 0.3048 meters
Enter one value
Area
1 acre = 43,560 sqft
Enter one value
Volume
1 gallon = 3.78541 liters
Enter one value
Horsepower and Efficiency
hp=(gpm x hd ft x SG)/(3,960 x Eff%)
Enter two of gpm, head ft, horsepower
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
Sludge Volume Index
SVI = (Settled ml/L x 1000) / (MLVSS mg/L)
Enter two of Settled, MLVSS, and SVI
Suspended Solids
mg/L=(gr x 1,000 mg/g x 1,000 ml/L)/ml
Enter any two values
Sludge Age
SA = (MLVSS mg/L x 8.3454 x MG) /
(ISS mg/L x 8.3454 x MGD)
Enter all but one value
Mean Cell Residence Time
SA=(MLVSS lbs)/(Efflu SS lbs + Wasted)
Enter all but one value
Wasting Rate
Waste GPD =
((Actual - Target) x MG) / Waste mg/L
Enter all but one value
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
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
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
Rainfall Inflow Estimator
Enter drain sq ft or miles &
two of rain, percent, & inflow
NPDES Flow Exceedance
Enter all values below
Process Efficiency
Enter amounts in same units
Chemical / Gallons
Enter gallons & ppm, sol% if needed
Chemical / Cubic Tank
Enter dimensions & ppm, sol% if needed
Chemical / V Trough Tank
Enter dimensions & ppm, sol% if needed
Chemical / Cylinder Tank
Enter dimensions & ppm, sol% if needed
Chemical Pump Size
Enter all values below
Rate Study
Enter ANNUAL values in same units