Chicken Calculators
Free, no sign up tools for planning and running a backyard flock. Each one uses the same rules of thumb experienced keepers rely on, applied to your exact flock size, coop dimensions and climate, with a full guide underneath explaining the numbers.
Chicken Feed Calculator
How much feed your flock eats per day, month and year, and what it costs.
Coop Bedding Calculator
Bags of pine shavings, straw or hemp needed per change and per year.
Chicken Run Size Calculator
Square feet of outdoor run space per bird and in total.
Coop Ventilation Calculator
Square feet and square inches of vent opening a coop needs by climate.
Nest Box Calculator
How many nest boxes your hens need and what size to build them.
Roost Length Calculator
Inches of roost bar per bird and total linear feet for the flock.
Chicken Waterer Calculator
Daily water use, waterer size and how many drinkers your flock needs.
Egg Cost and ROI Calculator
Your real cost per dozen versus store prices, including setup payback.
Egg Production Predictor
Forecast weekly, monthly and yearly egg yield by breed, age and season.
Brooder Size Calculator
Brooder floor space, heat, feeder and waterer needs for a batch of chicks.
Incubation Hatch Date Calculator
Hatch day, lockdown day and candling dates from the day you set the eggs.
Chicken Age Calculator
Age in weeks, months and years, plus life stage, laying status and the right feed.
Flock Expansion Calculator
Whether your current coop and run can take more birds, and what to add if not.
Egg Carton Profit Calculator
What you actually make selling eggs by the dozen after feed and carton costs.
Chicken Wire Calculator
Rolls of wire, posts and cost to fence and cover a chicken run.
Predator Fence Calculator
Hardware cloth, dig apron, posts and cost for a genuinely predator proof run.
Hen or Rooster Checker
AI checker that tells you whether a young bird is a hen or a rooster.
Coop Size Planner
Coop, run, nest box and roost needs for a flock in one plan.
Which calculator should you start with?
If you are still planning, start with coop and run space. Space per bird drives almost every other decision, including how much bedding you buy, how much ventilation the building needs and how many nest boxes and feet of roost bar to build.
Planning a new coop
Work through the coop size planner, then the run size, ventilation, nest box and roost length calculators in that order. Together they produce a build list before you buy a single board.
Running an existing flock
The feed, waterer and bedding calculators cover your recurring costs. The egg production predictor and cost per dozen calculator tell you what the flock returns.
Free to embed
Every calculator here is also available as a free embeddable widget for your own blog or club site. Grab a snippet from the widget directory.