Backyard flock math, done for you
Flock Figures has free, fast calculators for planning and running a backyard flock: coop and run size, hatch dates, brooder temperatures, feed, water, bedding, lighting and what your eggs really cost. Every number is based on published university extension guidance, and everything runs in your browser.
Calculators
Chicken Coop Size CalculatorEnter your flock size and breed type to get coop square footage, a buildable footprint, roost length, nest boxes and ventilation, based on extension-service guidelines.Chicken Run Size CalculatorWork out how big a chicken run should be for your flock, the fence perimeter, and how many rolls of hardware cloth to buy for the walls and an anti-dig apron.Egg Incubation & Hatch Date CalculatorPick a species and set date to get the expected hatch date, candling days, lockdown date and a day-by-day schedule for chicken, duck, quail, goose, turkey, guinea and more.Brooder Temperature by WeekEnter your chicks' hatch date to see today's target brooder temperature and the full week-by-week schedule for chicks, ducklings, turkey poults and quail.How Many Chickens Do I Need?Find out how many hens you need for a dozen eggs a week, or enough eggs for a family of 4, accounting for breed, winter slowdown and older hens.Chicken Feed CalculatorCalculate daily, monthly and yearly feed for your flock, how many bags to buy and what it costs, for layers, bantams, chicks and meat birds.Backyard Egg Cost CalculatorCompare the true cost per dozen of backyard eggs (feed, bedding, setup and chicks) with the store price, and see your payback time.Chicken Age CalculatorEnter a hatch date to see exactly how many weeks old your chickens are, their current life stage, when to switch feed and the expected first-egg window.Coop Lighting Calculator for Winter LayingCalculates natural day length for your latitude and date, how much supplemental light hens need to reach 14-16 hours, and what time to set the coop light timer.Coop Bedding CalculatorCalculate how many cubic feet and bags of pine shavings, straw or hemp you need for your coop floor, including the deep litter method, and the yearly cost.Chicken Water CalculatorEstimate how much water your flock drinks per day in cool and hot weather, what size waterer you need and how often you'll refill it.
Planning your first flock?
Work through it in this order: decide how many hens you need, size the coop and run, then estimate the feed and yearly cost. If you're hatching, the incubation calendar and brooder schedule will take you from egg to pullet.
Check your town's rules on flock size, roosters and coop setbacks before you buy birds.