Home › Saving water in... › Home › GreySmart › H2OmeCalc › Calculator
Smaller fontStandard fontLarger font

H2OmeCalc

H2OmeCalc will give you an estimate of the volume of water generated and indicative costs to help you to decide whether greywater use is a good investment.

Your household

Some of the H2OmeCalc calculations use climate information, such as rainfall. For this we need to know your location.
people
 
Recalculate
Toilets

Toilets

Please indicate the types of toilets in your house and their water source.

Note: Greywater used in toilets must be treated appropriately or fit for intended use (i.e. Class A)

Toilet type
Water source
Your household
Recalculate
Bathroom

Bathroom

showers
minutes
10 L/min
baths per week
litres
Toilets
Recalculate
Laundry

Laundry

Please indicate the type of washing machine in your house and its water source.

Please note: Greywater used in washing machines must be treated appropriately or fit for intended use (i.e. Class A)

Washing machine typeUsage ?

Washing machine usage

The table below shows the average number of washes per week for a household.

If your household does fewer washes per week than this average please select "Low" usage. If your household does more washes per week please select "High" usage.
People in household 1 2 3 4 5 6 7 8 9 10
Average washes 2 3 4 6 7 8 9 11 12 13
Water source
Bathroom
Recalculate
Garden

Garden

Please identify the various areas within your garden. Use the drop-down menus to describe your watering requirements and the relevant water sources that service them.

Garden
Area (m2)
Water demand ?

Water demand

Low – succulent, cactus or native plants with low water requirements
Mod – a mix of native and english garden plants surviving
High – More traditional english gardens with a lush feel
Planting density ?

Planting density

Low – Immature and sparsely planted landscapes
Mod – Full planting of one species type
High – Plantings with mixtures of vegetation types (trees, shrubs, and groundcovers)
Sun/wind exposure ?

Sun/wind exposure

Low – Plantings that are shaded for a substantial part of the day or are protected from winds typical to the area
Mod – Open-garden setting without extraordinary winds or heat inputs not typical for the location
High – Plantings surrounded by heat-absorbing surfaces, reflective surfaces, or exposed to particularly windy conditions. e.g. next to northwest-facing walls of a building, or in “wind tunnel” areas
Mulch depth
Water source
Total garden area identified 0 m2
Laundry
Recalculate
Lawn

Lawn

Please identify the various areas of lawn around your house. Use the drop-down menus to describe your watering requirements and the relevant water sources that service them.

Lawn area
Area (m2)
Season ?

Season

‘Warm’ and ‘cool’ describes grasses that are primarily suited for either warm or cool seasons.
Warm season grasses are known for their drought tolerant nature. They include couch, kikuyu, and buffalo. For more about warm season grass visit www.warmseasongrass.com.au
Cool season grasses include varieties of bluegrass, ryegrass and fescue.
Sun/wind exposure ?

Sun/wind exposure

Low – Plantings that are shaded for a substantial part of the day or are protected from winds typical to the area
Mod – Open-garden setting without extraordinary winds or heat inputs not typical for the location
High – Plantings surrounded by heat-absorbing surfaces, reflective surfaces, or exposed to particularly windy conditions. e.g. next to northwest-facing walls of a building, or in “wind tunnel” areas
Water source
Total lawn area identified 0 m2
Total garden area to be irrigated: 0 m2
Garden
Recalculate
Greywater

Greywater supplies

Buckets, hose from washing machine or subpump in bath.
Which of the following will you be capturing greywater from for your greywater diversion/treatment system?
Washing machineShowerBathOther basinsKitchen
n/a
n/a
n/a
n/a
n/a
Yes       No
buckets per week
Lawn
Recalculate
Rainwater

Rainwater supplies

%
Yes     No
m2
kL
metres
Greywater
Recalculate
Rebates

Rebates

If you may be eligible for a rebate to install a greywater or rainwater system, please include the amount below.

$
Garden & lawn
Recalculate
Calculate

H2OmeCalc was developed by Atura Pty Ltd and is a funded initiative of the Smart Water Fund.

Disclaimer – This is a simple decision tool design to give estimates for comparative purposes. It is necessary for the householder to get site specific quotations and make their own decision based on the value they place on saving water and on their garden.