7 KIN HOMESTEAD
RAINWATER CATCHMENT CALCULATOR
Enter your location and homestead details to get a complete water picture β collection potential, total demand, storage sizing, and your state's legal status on rainwater harvesting.
01
Location & Roof
02
Household Use
03
Garden & Animals
04
Full Results
7 KIN HOMESTEAD
Rainwater Catchment Calculator
π Location & Rainfall
Enter your ZIP code to automatically pull average monthly rainfall data and your state's legal status on rainwater collection.
Your ZIP Code
Roof Catchment Area
sq ft
Use the footprint of your roof β roughly the same as your home's square footage.
Roof Material
ποΈ Metal
90% efficiency
π Asphalt Shingle
80% efficiency
ποΈ Clay / Tile
75% efficiency
πΏ Green Roof
40% efficiency
First-Flush Diverter?
I have / plan to install one
Diverts the first dirty runoff. Reduces yield ~5% but greatly improves water quality.
Dry Season Buffer Goal
30 days
45 days
60 days
90 days
Storage will cover this many consecutive days of zero rainfall.
π‘ Household Water Use
Set your household size and water habits. Toggle off uses that won't apply to your system.
People in Household
people
Gallons per person per day
Daily use per person
10
gal/person/day
1 gal
Extreme conservation 25 gal
Off-grid typical 100 gal
Comfort / standard
Extreme conservation 25 gal
Off-grid typical 100 gal
Comfort / standard
Indoor Uses β toggle off what won't apply
πΏ Showers & Bathing
π½ Toilet Flushing
π³ Cooking & Drinking
π Laundry
π½οΈ Dishwashing
Outdoor Use
π Vehicle washing
π² Yard / landscaping
π± Garden & Livestock
Add your growing space and animals. Water demand is calculated from real consumption figures per species.
Garden / Growing Area
sq ft
Raised beds, market garden, orchard area. Leave blank if none.
π‘ Garden demand is calculated seasonally β only irrigation months count, and in-season rainfall automatically offsets your need.
Garden Water Intensity
Low
Dry-climate crops Medium
Mixed vegetables High
Water-heavy crops
Dry-climate crops Medium
Mixed vegetables High
Water-heavy crops
Livestock β tap to add, set quantity
Chickens
0.5 gal/bird/day
Ducks
1 gal/bird/day
Goats
2 gal/head/day
Pigs
4 gal/head/day
Sheep
2 gal/head/day
Cattle
30 gal/head/day
Horses
12 gal/head/day
Rabbits
0.25 gal/head/day
Additional Factors
π Aquaponics / Fish pond
π‘οΈ Hot & dry climate (+20%)
π§
Your Water Picture Awaits
Work through the three steps on the left, then hit Calculate on the last step to see your full rainwater system breakdown.
