Wastewater Treatment System Calculators

Note: Use only if Gallons Per Minute is unknown, for example if the flow meter test result is unavailable.

Tank Gallons Per Inch Inches Dropped During Test

Gallons Per Minute Pump Flow 0.00 GPM

On Time (seconds) Gallons Per Cycle

Gallons Per Minute Pump Flow 0.00 GPM

# Emitters Emitter GPH

Drip Emitter GPM 0.00 GPM

Run Time (min/sec)

Gallons Per Dose 0.00 gal

Doses Per Day

Gallons Per Day 0.00 gal/day

Note: Gallons Per Minute Pump Flow must be known for this calculator to function.

Cycles Per Day Gallons Per Cycle

On Time (seconds) 0.00 sec

Off Time (minutes) 0.00 min

System Maximum Dose Volume 0.00 gal/day

Note: Gallons Per Minute Pump Flow must be known for this calculator to function.

On Time (seconds) Off Time (minutes)

Cycles Per Day 0.00 cycles

Gallons Per Cycle 0.00 gal

System Maximum Dose Volume 0.00 gal/day

Last Inspection Date Current Inspection Date

Total Days In Period 0 days

Note: Total Days In Period and Gallons Per Dose must be known.

Last Cycles Current Cycles Gallons Per Dose

Total In Period 0.00 cycles

Average Daily Flow 0.00 gallons

Last Inspection Date Current Inspection Date

Total Days In Period 0 days

Note: Total Days In Period, Gallons Per Dose, and Run Time Per Dose must be known.

Last ETM (hours) Current ETM (hours) Gallons Per Dose Run Time Per Dose (seconds)

Total In Period 0.00 hours

Average Daily Flow 0.00 gallons

Last Inspection Date Current Inspection Date

Total Days In Period 0 days

Note: Total Days In Period and Gallons Per Minute Pump Flow must be known for the source system.

Last Flow Meter (gallons) Current Flow Meter (gallons)

Total Gallons In Period 0.00 gallons

Average Daily Flow 0.00 gallons

a. length: (ft) b. depth: (ft) c. width: (ft)

Rectangular tank diagram showing length, depth, and width

Tank Volume 0.00 gal

Gallons Per Inch 0.00 gal/in

a. diam: (ft) b. depth: (ft)

Vertical round tank diagram showing diameter and depth

Tank Volume 0.00 gal

Gallons Per Inch 0.00 gal/in

a. radius1: (ft) b. width: (ft) c. length: (ft) d. radius2: (ft) e. depth: (ft)

Horizontal obround tank diagram showing radius1, width, length, radius2, and depth

Tank Volume 0.00 gal

Approx Gallons Per Inch 0.00 gal/in

Flow And Tank Math

Gallons Per Minute: Gallons Per Inch x Inches Dropped during 1 minute
Round/Rectangle Tank: ((pi x radius 1 x depth) / 2 + (pi x radius 2 x depth) / 2 + (length x width x depth)) x gallons per cubic foot
Round Tank: (pi x diameter / 4 x depth) x gallons per cubic foot
Rectangle Tank: (length x depth x width) x gallons per cubic foot

Timed Dosing

On Time: (Gallons Per Cycle / Gallons Per Minute) x 60
Off Time: (24 / Cycles Per Day) - (On Time in minutes)
Cycles Per Day: 24 / (Off Time in hours)
Gallons Per Cycle: (On Time in minutes) x (Gallons Per Minute)

Average Daily Flow

Gallons Per Day per Cycle Counter: (((Current Cycle Count) - (Last Cycle Count)) x (Gallons Per Cycle)) / Days In Period
Gallons Per Day per ETM: (((Current ETM) - (Last ETM)) x (Gallons Per Minute x 60)) / Days In Period
Gallons Per Day per Flow Meter: ((Current Flow Meter) - (Last Flow Meter)) / Days In Period

Constants And Conversions

pi: 3.14159265
Gallons Per Cubic Foot: 7.48051945
Convert Seconds To Minutes: Seconds / 60
Convert Minute To Seconds: Minutes x 60
Convert Minutes To Hours: Minutes / 60
Convert Hours To Minutes: Hours x 60
1 psi: 2.3 ft head