Acre
Tools
☰
Homestead
🥚 Egg Production
🏠 Chicken Coop Size
🐔 How Many Chickens
🐣 Egg Incubation Dates
🌾 Fodder Sprouting
🐐 Goat Milk
🐐 Goat Herd Size
🐷 Pig Feed
🐰 Rabbit Colony
🐴 Horse Hay
🌾 Hay Storage Space
💸 Flock Startup Cost
🐕 Dog Food
🐄 Livestock Gestation
🐟 Pond Stocking
🫙 Tallow Rendering
🪲 Black Soldier Fly
🔥 Biochar
Beekeeping
🍯 Beehive Capacity
🐝 Colony Split
💸 Beekeeping Startup
💰 Honey Pricing
Garden
🪴 Raised Bed Soil
🌱 Seed Starting Dates
📐 Square Foot Garden
♻️ Compost Ratio
💧 Drip Irrigation
🌡️ Greenhouse Size
🏗️ Hoop House Materials
Hunting
🌙 Solunar / Moon Phase
🌿 Deer Food Plot
🦌 Deer Per Acre
🦃 Turkey Hunting
🎣 Fishing Moon Phase
🍖 Smoking Meat
🦌 Deer Antler Score
🐟 Fish Fillet Yield
🏹 Arrow Spine
🥩 Wild Game Aging
🔥 Campfire Wood
🍲 Dutch Oven Coals
🧂 Meat Dry Cure
Off-Grid
☀️ Solar Panel Sizing
🌧️ Rainwater Collection
🪣 Water Storage
💧 Well Water Yield
🥫 Food Storage
⚡ Generator Fuel
🪵 Fence Post
🪵 Wood Stove Sizing
🪓 Firewood Season
🚐 RV Tank Days
🔧 Septic System Size
Prepper
📦 LDS 1-Year Food Storage
📦 LDS 3-Month Supply
🆘 72-Hour Emergency Kit
🎒 Bug Out Bag
🍽️ Grid-Down Meal Planner
🏠 Shelter In Place
⚡ EMP Prep Checklist
Farm Biz
🏪 Market Pricing
💰 Egg Profit
📦 CSA Box Value
🐔 Flock Startup Cost
🏦 Farm Land Loan
🧾 Property Tax Estimator
🌾 Crop Insurance
🚜 Equipment Depreciation
Land
📐 Acres to Sq Ft
📐 Sq Ft to Acres
💲 Land Price Per Acre
🐄 Cattle Per Acre
🗺️ Land Value Estimator
Real Estate
🏠 Rent vs Buy
💸 Is My Rent Too High
🏦 Mortgage Affordability
🔑 First Time Buyer Costs
🧾 Security Deposit Refund
📋 Lease Break Cost
📈 Rental Property ROI
💰 Cash Flow Analyzer
📊 Cap Rate
Health
🥩 Keto / Carnivore Macros
🧖 Sauna Protocol
Everyday
💵 Tip Calculator
🧱 Concrete Slab
Home
›
Off-Grid
› RV Tank Days
🚐 RV Holding Tank Calculator
Find out how many days you can boondock before needing to dump or refill.
Tank Sizes
Fresh Water Tank (gallons)
Grey Water Tank (gallons)
Black Water Tank (gallons)
Number of People
Daily Usage
Shower Habit
Daily full shower (8 gal/person)
Quick Navy shower (2 gal/person)
Campground showers only (0.5 gal misc)
No shower in RV
Dish Washing
Full wash (3 gal/day)
Quick rinse (1 gal/day)
Paper plates — no dish water
Toilet Flush
Normal flush (1.5 gal, 5x/person/day)
Water-saver flush (0.5 gal)
Drinking / Cooking Water
Standard (1 gal/person/day)
Conservative (0.5 gal/person/day)
Calculate Tank Days
Your Boondocking Range
Fresh Water Lasts
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Grey Tank Full In
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Black Tank Full In
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Your Bottleneck
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Fresh Used Per Day
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Black Produced/Day
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RV Tank Tips
Black tank is almost always the limiting factor
for boondocking couples. Target <1.5 gal/flush and use campground facilities when available.
Composting toilet:
Eliminates the black tank entirely — the #1 upgrade for serious boondockers.
Grey water dumping:
Legal in many National Forests and BLM land (check local rules). Never dump black water on the ground.
Never leave the grey valve open
while connected — solids accumulate at the drain fitting and create a "poop pyramid" that's very hard to clear.
Tank sensors get dirty
and read incorrectly over time. Flush with ice and detergent to clean.