Chicken Calculators
Chicken calculators take the guesswork out of keeping chickens. PeckCalc's 41 free calculators work out coop and run size, feed and water, egg production, brooder heat, hatch dates and flock costs from your birds and your setup. Every figure is a planning estimate from university extension sources, and every calculation happens in your browser — no sign-up, no account.
Coop size
Chicken Coop Size Calculator
Birds x breed size x setup -> coop sq ft, footprint, roost length, nest boxes
Target keyword: chicken coop size calculator
Run size
Chicken Run Size Calculator
Birds x breed x confined vs free-range -> run sq ft
Target keyword: chicken run size calculator
Feed quantity
Chicken Feed Calculator
Flock x age/breed -> lb/day, bags/month
Target keyword: chicken feed calculator
Feed cost
Chicken Feed Cost Calculator
User-entered prices -> cost/day, per dozen, per month, bag duration
Target keyword: chicken feed cost calculator
Egg production
Egg Production Calculator
Hens x breed laying rate -> eggs/week, feed cost per dozen
Target keyword: egg production calculator
Brooder size & heat
Chick Brooder Size Calculator
Chicks x age -> brooder sq ft, heat-lamp watts, feed by week
Target keyword: chick brooder size calculator
Nest boxes
How Many Nest Boxes Per Chicken?
Hens -> nest boxes needed (+ dimensions, wall length, mounting height)
Target keyword: how many nest boxes per chicken
Water
Chicken Water Calculator
Flock x temperature -> litres/day, waterer size, drinking points
Target keyword: how much water do chickens drink per day
Hatch date / incubation
Chicken Hatch Date Calculator
Set date -> hatch date, lockdown, candling, turning schedule
Target keyword: chicken hatch date calculator
First egg
First Egg Calculator
Breed + hatch date -> first egg date + egg colour
Target keyword: when do chickens start laying eggs
Egg colour
Egg Colour Calculator
Parent breeds -> egg colour probabilities + visual egg chart
Target keyword: egg colour calculator
Chick growth
Chick Growth Calculator
Breed + age -> expected weight range + 'is my chick on track?' verdict
Target keyword: chick growth calculator
Chick feed by age
Chick Feed Calculator by Age
Chicks x age -> week-by-week starter/grower/layer feed + bag planning
Target keyword: chick feed calculator by age
Roost space
Roost Space Calculator
Birds x breed size -> bar length, height, spacing, bars needed
Target keyword: roost space calculator
Worming dosage
Chicken Worming Dosage Calculator
Bird weight -> Safeguard dosage (vet disclaimer)
Target keyword: chicken worming dosage calculator
Heat-lamp wattage
Heat Lamp Wattage Calculator
Brooder size + ambient temp -> watts needed
Target keyword: heat lamp wattage calculator
Ventilation
Chicken Coop Ventilation Calculator
Coop size + climate -> CFM + vent area + high/low split
Target keyword: chicken coop ventilation calculator
Reverse fit
How Many Chickens Can My Coop Hold?
Coop size -> how many chickens it holds, by breed
Target keyword: how many chickens can my coop hold
Coop materials & cost
Chicken Coop Cost Calculator
Coop size -> itemised materials + editable prices + cut list
Target keyword: chicken coop cost calculator
Cost per dozen
Cost Per Dozen Eggs Calculator
Feed + costs -> cost per dozen + selling price + payback
Target keyword: cost per dozen eggs calculator
Hatch rate / fertility
Hatch Rate Calculator
Eggs set + results -> fertility, hatchability, overall rates + diagnostic
Target keyword: hatch rate calculator
Egg weight loss
Egg Weight Loss Calculator
Egg weight over days -> weight-loss % + on-track verdict
Target keyword: egg weight loss calculator
Brooder temperature
Brooder Temperature Calculator
Hatch date -> week-by-week temperature schedule
Target keyword: brooder temperature calculator
Molting
Molting Calculator
Hen age + breed -> expected molt window + resume-laying date
Target keyword: molting calculator
Sex-linked / sexing
Sex Linked Chicken Calculator
Parent cross -> pullet/cockerel at hatch + genetics
Target keyword: sex linked chicken calculator
Feed formulation
Chicken Feed Formulation Calculator
Ingredients + targets -> ration mix with protein/energy
Target keyword: chicken feed formulation calculator
Flock planner
Chicken Flock Planner
Eggs wanted/week -> hens + coop + feed + cost
Target keyword: chicken flock planner
Stocking density
Chicken Stocking Density Calculator
Acres -> birds (backyard-simple, check local rules)
Target keyword: chicken stocking density calculator
Coop lighting
Chicken Coop Lighting Calculator
Location/latitude + date -> daylight + supplemental light schedule
Target keyword: chicken coop lighting calculator
FCR / feed efficiency
Feed Conversion Ratio Calculator
Feed + eggs/meat -> FCR + feed-per-egg + benchmarks
Target keyword: feed conversion ratio calculator
Flock planning
Rooster to Hen Ratio Calculator
Hens x breed type -> roosters needed, with the standard 1 per 10-12 hens rule
Target keyword: rooster to hen ratio calculator
Health
Corid Dosage Calculator Chickens
Corid 9.6% liquid -> dose per gallon of water for standard, severe and follow-up treatment
Target keyword: corid dosage calculator
Coop
Chicken Coop Bedding Calculator
Coop floor size -> cubic feet of bedding, bags or bales needed
Target keyword: chicken coop bedding calculator
Hatching
Incubator Capacity Calculator
Chicks wanted per week + hatch rate -> setter and hatcher size
Target keyword: incubator capacity calculator
Eggs
Chicken Egg Size Chart by Weight
Egg weight -> USDA size class, Peewee to Jumbo, plus dozen weight
Target keyword: chicken egg size chart by weight
Meat/Flock
Broiler Harvest Yield Calculator
Live weight + breed type + chill method -> dressed weight and freezer space
Target keyword: broiler harvest yield calculator
Garden/Compost
Chicken Manure Compost Calculator
Flock size -> fresh manure, bedding and finished compost estimates
Target keyword: chicken manure compost calculator
Feeding
Chicken Treats Calculator
Flock size -> most treats per day under the 90/10 rule, per hen and whole flock
Target keyword: chicken treats calculator
Inbreeding
Chicken Inbreeding Coefficient Calculator
Parents' relationship -> inbreeding coefficient (F) and risk band
Target keyword: chicken inbreeding coefficient calculator
Feeders
Chicken Feeder Calculator
Flock size and age -> feeder space, trough length, tube feeders and nipples
Target keyword: chicken feeder calculator
Manure fertiliser
Chicken Manure Fertilizer Calculator
Bed area and rate -> composted manure needed in lb, kg and buckets
Target keyword: chicken manure fertilizer calculator
Frequently asked questions
Are the PeckCalc chicken calculators free?
Yes. Every calculator on PeckCalc is free to use, with no sign-up and no account. All calculations happen in your browser.
Which chicken calculator should I start with?
Start with the Chicken Coop Size Calculator. It works out the coop floor space, run size, roost length and nest boxes your flock needs, and most of the other calculators build on those numbers.
Where do the figures in the calculators come from?
The figures come from published university extension sources, including Penn State Extension, the University of Minnesota Extension and Virginia Tech, plus Hy-Line breed data. Where sources disagree, the page shows the range and lets you pick the standard.
Do I need to enter prices to use the calculators?
Only for the cost calculators. PeckCalc never publishes feed, egg or material prices — you enter your own prices, and the calculator works out the cost from them.
Can I use the calculators on my phone?
Yes. The calculators work in any modern browser on a phone, tablet or computer, and nothing needs to be installed.