Biology Calculators

Annealing Temperature Calculator Estimate PCR annealing temperature from primer melting points.

Generation Time Calculator Find bacterial generation time from a growth period.

Cell Dilution Calculator Find how much stock cell suspension to dilute.

Cell Doubling Time Calculator Find cell-culture doubling time from two counts.

DNA Concentration Calculator Find DNA concentration from an A260 reading.

Ligation Calculator Find insert mass for a target molar ratio.

Log Reduction Calculator Find log reduction and percent kill of a population.

Protein Concentration Calculator Find protein concentration from an A280 reading.

Allele Frequency Calculator Find allele frequencies from allele counts.

Punnett Square Calculator Find offspring phenotype ratios from a monohybrid cross.

Dihybrid Cross Calculator Expected offspring counts for an AaBb × AaBb cross.

Trihybrid Cross Calculator Expected offspring counts for an AaBbCc × AaBbCc cross.

DNA Copy Number Calculator Find the number of DNA molecules in a sample.

qPCR Efficiency Calculator Find PCR amplification efficiency from a standard-curve slope.

DNA to mRNA Converter Transcribe a DNA coding strand into mRNA.

Cat Gestation Calculator Track cat pregnancy progress and due date countdown.

Cow Gestation Calculator Track cow pregnancy progress and due date countdown.

Dog Gestation Calculator Track dog pregnancy progress and due date countdown.

Goat Gestation Calculator Track goat pregnancy progress and due date countdown.

Guinea Pig Gestation Calculator Track guinea pig pregnancy progress and due date countdown.

Mare (Horse) Gestation Calculator Track mare (horse) pregnancy progress and due date countdown.

Llama Gestation Calculator Track llama pregnancy progress and due date countdown.

Rabbit Gestation Calculator Track rabbit pregnancy progress and due date countdown.

Sheep Gestation Calculator Track sheep pregnancy progress and due date countdown.

Swine Gestation Calculator Track swine pregnancy progress and due date countdown.

Dog Age Calculator Convert your dog's age into human-equivalent years.

Dog Food Calculator Estimate your dog's daily calorie needs.

Dog Water Intake Calculator Estimate how much water your dog needs daily.

Dog Crate Size Calculator Find the right crate size for your dog.

Cost of Owning a Dog Calculator Estimate the lifetime cost of owning a dog.

Raw Dog Food Calculator Find a daily raw-food portion for your dog.

Dog Life Expectancy Calculator Estimate a dog's life expectancy by size.

Dog BMI Calculator A rough body-mass index for dogs (informational).

Dog Nutrition Calculator Find daily calories and grams of food for a dog.

Dog Heat Cycle Calculator Track a dog's heat (estrus) cycle stage.

Dog Harness Size Calculator Find harness size from chest girth.

Dog Size Calculator Estimate a puppy's adult weight.

Dog Chocolate Toxicity Calculator Screen chocolate-ingestion risk for a dog. Not a substitute for a vet.

Dog Onion Toxicity Calculator Screen onion-ingestion risk for a dog. Not a substitute for a vet.

Dog Raisin Toxicity Calculator Screen grape/raisin-ingestion risk for a dog. Not a substitute for a vet.

Dog Quality of Life Calculator Score your dog's quality of life with the HHHHHMM scale.

Benadryl Dosage Calculator for Dogs General Benadryl (diphenhydramine) reference. Always confirm with your vet first.

Omega-3 for Dogs Calculator General omega-3 (EPA+DHA) reference for dogs. Confirm with your vet.

Cat Age Calculator Convert a cat's age to human-equivalent years.

Cat Calorie Calculator Estimate your cat's daily calorie needs.

Cat Water Intake Calculator Estimate your cat's daily water needs.

How Big Will My Cat Get Calculator Estimate adult cat weight from a kitten's 16-week weight.

Cat BMI Calculator A rough body-mass index for cats (informational).

Cat Chocolate Toxicity Calculator Screen the risk if a cat eats chocolate. Not a substitute for a vet.

Cat Quality of Life Calculator Score your cat's quality of life with the HHHHHMM scale.

Benadryl Dosage Calculator for Cats General Benadryl (diphenhydramine) reference. Always confirm with your vet first.

Fish Oil Dosage Calculator for Cats General omega-3 (EPA+DHA) reference for cats. Confirm with your vet.

Crickets Chirping Thermometer Estimate temperature from cricket chirps (Dolbear's law).

Horse Weight Calculator Estimate a horse's weight from girth and body length.

Turtle Tank Size Calculator Find the minimum tank size for a turtle.

Rabbit Cage Size Calculator Find a minimum enclosure size for a rabbit.

Rat Cage Size Calculator Find the minimum cage volume for pet rats.

Hamster Age Calculator Convert a hamster's age to human-equivalent years.

Guinea Pig Years to Human Years Calculator Convert guinea pig age to human-equivalent years.

Dry Matter Calculator Convert an as-fed nutrient to a dry-matter basis.

Bird Age Calculator Convert a bird's age to human-equivalent years.

Rabbit Color Calculator Predict offspring coat color for a single gene.

Animal Mortality Rate Calculator Find mortality rate as a percentage of a herd or flock.

Cattle per Acre Calculator Find how many cattle a pasture can support.

Feed Conversion Ratio Calculator Find how efficiently animals convert feed to weight.

Grain Bin Calculator Estimate the bushel capacity of a round grain bin.

Livestock Fence Cost Calculator Estimate fencing material cost for a paddock.

Mulch Calculator Find how much mulch you need to cover a garden bed.

Plant Spacing Calculator Find how many plants fit a bed at a given spacing.

Grass Seed Calculator Estimate the grass seed needed for a lawn.

Compost Calculator Estimate compost volume needed for a bed.

Raised Bed Soil Calculator Find soil volume to fill a raised bed.

Soil Calculator Estimate topsoil volume for an area.

Sod Calculator Estimate sod rolls/pallets for a lawn.

Tree Spacing Calculator Find how many trees fit an area at a spacing.

Acres Per Hour Calculator Find field work rate from implement width and speed.

Bulb Spacing Calculator Find how many bulbs fit a planting area.

CO₂ Grow Room Calculator Find CO₂ needed to enrich a grow room.

Corn Yield Calculator Estimate corn yield in bushels per acre.

Daily Light Integral Calculator Find DLI from light intensity and hours.

Fertilizer Calculator Find fertilizer needed for a nitrogen rate.

Growing Degree Units Calculator Find growing degree units for a day.

Grain Conversion Calculator Convert bushels of grain to pounds and tonnes.

Lawn Mowing Cost Calculator Estimate the cost to mow a lawn.

Pine Straw Calculator Estimate pine straw bales for a mulched area.

Plant Population Calculator Find plants per acre from row and plant spacing.

Potting Soil Calculator Find potting soil needed to fill containers.

Vegetable Seed Calculator Find seeds needed for a row.

Vegetable Yield Calculator Estimate total harvest from a number of plants.

VPD Calculator Find vapor pressure deficit from temperature and humidity.

Water Potential Calculator Find water potential from solute and pressure potential.

Water Soluble Fertilizer Calculator Find fertilizer grams for a target ppm in water.

Basal Area Calculator Find a tree's basal area from its diameter (DBH).

Tree Diameter Calculator Find tree diameter from its circumference.

Tree Height Calculator Estimate tree height using distance and an angle.

Tree Age Calculator Estimate a living tree's age from its diameter.

Tree Leaves Calculator Roughly estimate the number of leaves on a tree.

Tree Value Calculator Estimate timber value from board feet (Doyle rule).

Pet Sitter Rates Calculator Estimate the cost of pet sitting.

Protein Molecular Weight Calculator Estimate a protein's molecular weight from residue count.

MLVSS Calculator Find mixed liquor volatile suspended solids.

Wastewater Detention Time Calculator Find hydraulic detention time in a tank.