Units information

This topic contains a list of all the display units available in InfoWorks WS Pro. There are three built-in sets of display units:

You can also set up your own preferred display format by setting the display units for individual data types. See Changing the display units for information on how to display data in your preferred format.

Unit grid key

The table below describes the structure of the Unit Types table, and explains what each of the columns contains.

Column Description

Code

The unit code used internally by InfoWorks WS Pro.

The Code column contains the data type codes seen in the following topics:

Field name

A description of the unit

Unit

The units used for the InfoWorks WS Pro Native Units system

MGD/FT3

The units used for the built-in MGD or FT3 units system

Help text

This column contains a more detailed description of the unit.

If additional units are available for the field, these are listed in the help text section. The columns in this grid contain the following details

Column Description

Unit

The alternative unit type available for this unit code

Multiplier

This is the conversion multiplier applied to the value when converting from InfoWorks WS Pro Native Units to this unit type

Offset

This is the conversion offset added to the value when converting from InfoWorks WS Pro Native Units to this unit type

Precision adjustment

This is the change in the number of decimal places allowed when the unit type changes. If the size of the unit increases, for example metres to kilometres, then this will be a positive number.

InfoWorks WS Pro unit types

Code Field name Unit MGD FT3 Help text
DUR Duration minutes minutes   General unit of duration

GRAVITY

Gravity

m/s2

ft/s2

ft/s2

Unit for the acceleration due to gravity.

Unit Multiplier Offset Precision adjustment

ft/s2

3.28083

0

1

HEAD

Head

m

ft

ft

General unit of pressure relative to datum

Unit Multiplier Offset Precision adjustment

ft

3.280839895

0

0

KVIS

Kinematic Viscosity

m2/s

ft2/s

ft2/s

Viscosity of the modelled fluid

Unit Multiplier Offset Precision adjustment

ft2/s

10.76391042

0

1

L

Length

m

ft

ft

General unit of length.

Unit Multiplier Offset Precision adjustment

ft

3.280839895

0

0

NA

Area

m2

ft2

ft2

General unit of area.

Unit Multiplier Offset Precision adjustment

ha

0.0001

0

4

km2

0.000001

0

6

ft2

10.76391042

0

0

acre

0.000247

0

3

PIPE_CO2

CO2 Unit Cost

kg/m

lb/ft

lb/ft

Carbon dioxide equivalent cost of material per unit length.

Unit Multiplier Offset Precision adjustment

lb

0.67197

0

1

PIPE_CO2TOT

CO2 Material Cost

kg

lb

lb

Carbon dioxide equivalent cost of pipe material.

Unit Multiplier Offset Precision adjustment

lb

2.204623

0

1

PS

Pipe size

mm

in

in

Used for all measurements of pipe size

Unit Multiplier Offset Precision adjustment

in

0.039370078

0

1

Q

Flow

m3/s

MGD

ft3/s

General unit of flow.

Unit Multiplier Offset Precision adjustment

ft3/s

35.31466672

0

-1

l/s

1000

0

-3

MGD

22.82453638

0

-1

US gal/min

15850.37248

0

-4

TS

Time

s

s

s

Time interval.

Unit Multiplier Offset Precision adjustment

day

0.0000116

0

4

V

Velocity

m/s

ft/s

ft/s

General unit of velocity.

Unit Multiplier Offset Precision adjustment

ft/s

3.280839895

0

0

VO

Volume

m3

US Mgal

ft3

General unit of volume.

Unit Multiplier Offset Precision adjustment

ft3

35.31466672

0

-1

l

1000

0

-3

US gal

264.1728747

0

-2

US Mgal

0.000264

0

3

WN_AV

Rotation speed

rpm

rpm

rpm

General unit of speed for pumps

WN_C

Concentration

mg/l

mg/l

mg/l

Used in water quality calculations

WN_COST

Cost

£

£

£

Used for electricity tariffs and Price of Water calculations for links

WN_DDEN

Demand Density

l/day/ha

US Mgal/day/acre

ft3/day/acre

Property related flow per unit area

Unit Multiplier Offset Precision adjustment

ft3/day/acre

0.014291361

0

1

US Mgal/day/acre

0.009236776

0

1

WN_DIFF

Molecular Diffusivity

m2/s

m2/s

m2/s

Used in water quality calculations

WN_DMXR

Dead Main Exchange Rate

l/s

US Mgal/day

ft3/s

Water Quality Reservoir mixing rate for compartments

Unit Multiplier Offset Precision adjustment

ft3/s

0.035314667

0

1

US Mgal/day

0.022824536

0

1

WN_DQ

Demand Flow

l/s

US Mgal/day

ft3/s

Total Demand Flow

Unit Multiplier Offset Precision adjustment

UK gal/hour

791.88768

0

-2

ft3/s

0.035314667

0

1

UK Mgal/day

0.0190053

0

1

US gal/s

0.264172875

0

0

UK gal/s

0.2199688

0

1

UK gal/min

13.198128

0

-1

US gal/min

15.85037244

0

-1

Ml/day

0.0864

0

1

m3/s

0.001

0

3

m3/hr

3.6

0

0

l/min

60

0

-1

acre-ft/day

0.070047513

0

1

US Mgal/day

0.022824536

0

1

m3/day

86.4

0

-1

WN_DRATE

Daily rate

£/kWh

£/kWh

£/kWh

Electricity tariff cost

WN_DVO

Demand Volume

l

US gal

ft3

Total volume of demand

Unit Multiplier Offset Precision adjustment
m3 0.001 0 3

ft3

0.035314667

0

1

US gal

0.264172875

0

0

WN_EN

Energy

kWh

kWh

kWh

Pump power supplied

WN_EN_DY

Daily Energy

kWh/d

kWh/d

kWh/d

Pump power supplied per day

WN_ESC

Consumption

kWh/m3

kWh/m3

kWh/m3

Pump power consumption per unit of flow delivered

WN_GHG_DYMASS

Daily CO2 equv. Mass

kg/d

lb/d

lb/d

Carbon dioxide equivalent of energy per unit mass per day

Unit Multiplier Offset Precision adjustment

lb/d

2.204623

0

0

WN_GHG_DYMVO

Daily CO2 equv. per volume

kg/m3/d

lb/ft3/d

lb/ft3/d

Carbon dioxide equivalent of energy per unit volume per day

Unit Multiplier Offset Precision adjustment

lb/ft3/d

0.062428

0

0

WN_GHG_FACT

CO2 equv. Factor

kg/kWh

lb/kWh

lb/kWh

Carbon dioxide equivalent of energy

Unit Multiplier Offset Precision adjustment

lb/kWh

2.204623

0

0

WN_GHG_MASS

Mass

kg

lb

lb

Carbon dioxide equivalent of energy per unit mass

Unit Multiplier Offset Precision adjustment

lb

2.204623

0

0

WN_GHG_MPVOL

CO2 equv. per volume

kg/m3

 lb/ft3 lb/ft3

Carbon dioxide equivalent of energy per unit volume

Unit Multiplier Offset Precision adjustment

lb/ft3

0.062428

0

0

WN_HLUD

Headloss per unit distance

m/km

ft/mile

ft/mile

Link headloss

Unit Multiplier Offset Precision adjustment

ft/mile

5.28

0

0
ft/1000ft 1.0 0 0
WN_INERTIA Inertia kg m2 lbm ft2 lbm ft2

Moment of Inertia

Unit Multiplier Offset Precision adjustment

lbm ft2

23.73036447

0

0

WN_K

Roughness (CW)

mm

millifeet

millifeet

Link roughness

Unit Multiplier Offset Precision adjustment

millifeet

3.280839895

0

0

WN_KVA

Power Demand

kVA

kVA

kVA

Pump calculated power demand

WN_MF

Mass Flow

mg/s

mg/s

mg/s

Flow of substance for water quality analysis

WN_MRATE

Max power rate

£/kVA

£/kVA

£/kVA

Pump maximum power consumption

WN_OPEN

Opening

%

%

%

Valve opening

WN_P

Pressure

m

psi

psi

General unit of pressure.

Unit Multiplier Offset Precision adjustment

psi

1.4223

0

0

bar

0.0981

0

1

ft

3.280839895

0

0

in Hg

2.898

0

0

mm Hg

73.6092

0

-1

WN_PA

Polygon area

ha

acre

acre

General unit of area (polygons)

Unit Multiplier Offset Precision adjustment

acre

2.47105

0

0

WN_PDEN

Property Density

p/ha

p/acre

p/acre

Number of properties per unit area

Unit Multiplier Offset Precision adjustment

p/acre

0.404685642

0

1

WN_POW

Power

kW

kW

kW

General unit of electrical power used with electricity tariffs

Unit Multiplier Offset Precision adjustment

horsepower

1.341

0

0

WN_PVO

Pipe Volume

 m3 US Mgal ft3

Pipe Volume used to set pipe volume units in the Flushing Scheduler

Unit Multiplier Offset Precision adjustment

US gal

264.1728747

0

-2

US Mgal

0.0002641728747

0

3
Ml 0.001 0 3

ft3

35.31466672

0

-1

WN_Q

Flow

l/s

US Mgal/day

ft3/s

General unit of flow.

Unit Multiplier Offset Precision adjustment

UK gal/hour

791.88768

0

-2

US gal/s

0.264172875

0

0

UK gal/s

0.2199688

0

1

UK Mgal/day

0.0190053

0

1

US Mgal/day

0.022824536

0

1

UK gal/min

13.198128

0

-1

m3/s

0.001

0

3

m3/hr

3.6

0

0

m3/day

86.4

0

-1

l/min

60

0

-1

ft3/s

0.035314667

0

1

acre-ft/day

0.070047513

0

1

US gal/min

15.85037244

0

-1

Ml/day

0.0864

0

1
WN_QCUM Cumulative flow l US Mgal ft3

Cumulative flow

Unit Multiplier Offset Precision adjustment

ft3

0.0353146672

0

1

m3

0.001

0

3

Ml

0.000001

0

3

US gal

0.2641728747

0

0
US Mgal 0.0000002641728747 0 3

WN_QD

Specific consumption

l/p/day

US gal/p/day

ft3/p/day

Consumption per property in a time period.

Unit Multiplier Offset Precision adjustment

ft3/p/day

0.035314667

0

1

US gal/p/day

0.264

0

1

WN_QN

Night flow

l/hour

l/hour

l/hour

Night flow rate

WN_QNS

Specific night flow

l/p/hr

l/p/hr

l/p/hr

Night flow rate relative to properties
WN_RATE Rate per sec per sec per sec General unit of rate (used in Water Quality - Turbidity Analysis)

WN_RVO

Reservoir Curve volume

m3

US Mgal

ft3

General unit of reservoir volume

Unit Multiplier Offset Precision adjustment

US gal

264.1728747

0

-2

US Mgal

0.000264

0

3

Ml

0.001

0

3

ft3

35.31466672

0

-1
WN_STRESS Shear Stress N/m2 lbf/ft2 lbf/ft2

Unit of shear stress

Unit Multiplier Offset Precision adjustment

lbf/ft2

0.02089

0

0

WN_TS

Time step

min

min

min

Unit of the time interval for simulations

WN_TT

Travel time

hour

hour

hour

Unit of time for water quality travel times
WN_TURBIDITY Turbidity NTU NTU NTU Unit of turbidity
WN_TURBLEN Turbidity Length NTU.m NTU.ft NTU.ft

Measurement of turbidity per unit length

Unit Multiplier Offset Precision adjustment

NTU.ft

3.280839895

0

0

WN_VCOST

Volume cost

£/m3

£/US Mgal

£/ft3

Cost per unit volume

Unit Multiplier Offset Precision adjustment

£/Ml

1000

0

0

£/US Mgal

3785.4

0

0

pence/m3

100

0

-2

£/ft3

0.028316847

0

0

WN_VO

Volume

Ml

US Mgal

ft3

General unit of volume.

Unit Multiplier Offset Precision adjustment

ft3

35314.66672

0

-4

US Mgal

0.264172875

0

0

XY

X-Y co-ordinate

m

ft

ft

Unit for all location coordinates.

Unit Multiplier Offset Precision adjustment

ft

3.280839895

0

0

US Survey ft

3.280833437

0

0

Y

Depth

m

ft

ft

Measure of relative depth.

Unit Multiplier Offset Precision adjustment

ft

3.280839895

0

0

Z

Height above datum

m AD

ft AD

ft AD

Height above datum. Used with XY to define an exact position.

Unit Multiplier Offset Precision adjustment

ft AD

3.280839895

0

0

Network data field information

Changing the display units