Chemistry & Biology Calculators (93)
Real lab and life science math gets covered from the ground up, starting with molecular weight, molarity, and dilution calculators for any concentration or solution, alongside pH, ideal gas law, molar mass, stoichiometry, half life decay, osmolarity, and the Henderson-Hasselbalch buffer equation. Genetics gets its own real depth too: Punnett square, dihybrid and trihybrid cross, allele frequency, Hardy-Weinberg, mutation frequency, and ligation, plus DNA concentration, qPCR efficiency, protein concentration and molecular weight, PCR annealing temperature, log reduction, cell doubling time, and bacterial growth rate.
The agriculture and forestry side runs just as deep: crop and grain math for corn yield, grain bin sizing, grain conversion, grass and vegetable seed, dry matter, feed conversion ratio, growing degree units, plant population, potting soil, pine straw, sod, and livestock fencing, plus tree diameter, height, leaves, spacing, and value, and controlled environment tools for vapor pressure deficit, CO2 grow rooms, daily light integral, and bulb spacing.
There is also a full set of pet health and veterinary calculators: dog and cat BMI, weight, cage, crate, and harness sizing across dogs, cats, birds, guinea pigs, hamsters, rats, horses, and rabbits, a full ten species gestation calculator family, quality of life scoring, heat cycle and water intake, and real weight based dosing for Benadryl, cephalexin, tramadol, Metacam, fish oil, and omega 3, plus onion, raisin, and chocolate toxicity checks, all with prominent veterinary disclaimers.
Allele Frequency Calculator
Calculate dominant and recessive allele frequencies in a population from genotype counts.
Open calculator →Animal Mortality Rate Calculator
Calculate the mortality rate for a group of livestock or animals from the number of deaths and the initial population.
Open calculator →Bacterial Growth Rate Calculator
Calculate bacterial growth rate and doubling time from population change over time.
Open calculator →Basal Area Calculator
Calculate a tree cross-sectional basal area at breast height from its diameter.
Open calculator →Benadryl Dosage Calculator for Cats
Calculate a weight-based Benadryl (diphenhydramine) dose estimate for cats. Not a substitute for veterinary advice -- always consult your veterinarian before giving any medication.
Open calculator →Benadryl Dosage Calculator for Dogs
Calculate a weight-based Benadryl (diphenhydramine) dose estimate for dogs. Not a substitute for veterinary advice -- always consult your veterinarian before giving any medication.
Open calculator →Bird Age Calculator
Convert a pet bird age into equivalent human years based on species average lifespan.
Open calculator →Boiling Point Elevation Estimator
Estimate the boiling point increase of a solvent caused by a dissolved solute.
Open calculator →Bulb Spacing Calculator
Calculate how many flower bulbs fit in a garden bed at a given rectangular grid spacing.
Open calculator →Cat BMI Calculator
Calculate a feline body mass index (FBMI) from rib cage circumference and leg length.
Open calculator →Cat Chocolate Toxicity Calculator
Estimate chocolate toxicity risk for a cat based on body weight, chocolate type, and amount eaten. Not a substitute for veterinary advice -- contact your vet immediately if your cat has eaten chocolate.
Open calculator →Cat Pregnancy Calculator
Estimate a cat due date range from the number of days since mating.
Open calculator →Cat Quality of Life Calculator
Score a cat quality of life across 7 wellbeing factors using the published HHHHHMM scale.
Open calculator →Cattle per Acre Calculator
Estimate how many cattle a pasture can support based on forage yield, utilization rate, and animal unit size.
Open calculator →Cell Doubling Time Calculator
Calculate cell doubling time and growth rate from initial and final cell concentration measurements.
Open calculator →Cephalexin Dosage Calculator for Cats
Calculate a weight-based cephalexin antibiotic dose estimate for cats. Not a substitute for veterinary advice -- never administer without a veterinary prescription.
Open calculator →Cephalexin Dosage Calculator for Dogs
Calculate a weight-based cephalexin antibiotic dose estimate for dogs. Not a substitute for veterinary advice -- never administer without a veterinary prescription.
Open calculator →CO2 Grow Room Calculator
Calculate how much CO2 is needed to raise a grow room from a current to a target CO2 concentration.
Open calculator →Corn Yield Calculator
Estimate corn yield in bushels per acre from a pre-harvest sample of ears and kernel counts.
Open calculator →Cow Gestation Calculator
Estimate a cow calving date range and postpartum interval from the number of days since breeding.
Open calculator →Daily Light Integral Calculator
Calculate the daily light integral (DLI) a plant receives from light intensity and daily light duration.
Open calculator →Dihybrid Cross Calculator
Predict offspring genotype probabilities for two independent genes at once from two parent genotypes.
Open calculator →Dilution Calculator (C1V1=C2V2)
Calculate the final volume needed to dilute a stock solution to a target concentration.
Open calculator →Dilution Ratio Calculator
Calculates how much concentrate and water are needed to mix a cleaning or chemical product at a given X:Y dilution ratio.
Open calculator →DNA Concentration Calculator
Calculate nucleic acid concentration from a 260nm absorbance reading using the Beer-Lambert law.
Open calculator →DNA Copy Number Calculator
Calculate the number of DNA molecule copies in a sample based on mass and fragment length.
Open calculator →Dog BMI Calculator
Calculate a simplified body mass index for a dog from its weight and height.
Open calculator →Dog Chocolate Toxicity Calculator
Estimate chocolate toxicity risk for a dog based on body weight, chocolate type, and amount eaten. Not a substitute for veterinary advice. Contact your vet immediately if your dog has eaten chocolate.
Open calculator →Dog Crate Size Calculator
Calculate the minimum recommended dog crate dimensions from the dog own height and length.
Open calculator →Dog Harness Size Calculator
Determine the correct dog harness size category and leash width from the dog weight.
Open calculator →Dog Heat Cycle Calculator
Estimate the number of days until a dog next heat cycle from the days since her last cycle began.
Open calculator →Dog Onion Toxicity Calculator
Estimate onion toxicity risk for a dog based on body weight and amount eaten. Not a substitute for veterinary advice -- contact your vet immediately if your dog has eaten onions.
Open calculator →Dog Pregnancy Calculator
Estimate a dog due date range from the number of days since mating.
Open calculator →Dog Quality of Life Calculator
Score a dog quality of life across 6 wellbeing factors using a transparent points-based framework.
Open calculator →Dog Raisin Toxicity Calculator
Estimate raisin toxicity risk for a dog based on body weight and number of raisins eaten. Not a substitute for veterinary advice -- contact your vet immediately if your dog has eaten raisins.
Open calculator →Dog Water Intake Calculator
Calculate a dog recommended daily water intake from its weight and activity level.
Open calculator →Dry Matter Basis Calculator
Convert an as-fed nutrient percentage into a dry matter basis percentage, accounting for moisture content.
Open calculator →Feed Conversion Ratio Calculator
Calculate the feed conversion ratio for livestock from total feed consumed and total weight gained.
Open calculator →Fish Oil Dosage Calculator for Cats
Calculate a weight-based fish oil supplement dose for cats. Consult your veterinarian before starting any supplement.
Open calculator →Goat Gestation Calculator
Estimate a goat kidding date range from the number of days since breeding and breed size.
Open calculator →Grain Bin Calculator
Calculate the grain storage volume and capacity of a cylindrical grain bin in cubic feet and bushels.
Open calculator →Grain Conversion Calculator
Convert a weight of grain into bushels using the standard bushel weight for major crops.
Open calculator →Grass Seed Calculator
Calculate how much grass seed is needed to cover a rectangular or circular lawn area at a given coverage rate.
Open calculator →Growing Degree Units Calculator
Calculate daily growing degree units for a crop from the daily high and low temperature and a base temperature.
Open calculator →Guinea Pig Age Calculator
Convert a guinea pig age into equivalent human years using a published non-linear age chart.
Open calculator →Guinea Pig Pregnancy Calculator
Estimate a guinea pig due date range from the number of days since breeding.
Open calculator →Half-Life Decay Calculator
Calculate the remaining amount of a substance after radioactive or chemical decay over time.
Open calculator →Hamster Age Calculator
Convert a hamster age into equivalent human years using a published non-linear age chart.
Open calculator →Hardy-Weinberg Calculator
Predict expected genotype frequencies in a population at genetic equilibrium from an allele frequency.
Open calculator →Henderson-Hasselbalch Buffer pH Calculator
Calculate buffer solution pH using the Henderson-Hasselbalch equation.
Open calculator →Horse Gestation Calculator
Estimate a mare foaling date range from the number of days since mating.
Open calculator →Horse Weight Calculator
Estimate a horse body weight from girth, body length, height, and neck circumference measurements.
Open calculator →How Big Will My Cat Get Calculator
Predict a kitten adult weight from its current age and weight.
Open calculator →Ideal Gas Law Calculator
Calculate the volume of an ideal gas using the ideal gas law, given pressure, moles, and temperature.
Open calculator →Lawn Mowing Cost Calculator
Calculate the total cost of a lawn mowing job based on lawn area and a per-square-foot price.
Open calculator →Ligation Calculator
Calculate the mass of DNA insert needed for a cloning ligation reaction at a target insert-to-vector molar ratio.
Open calculator →Livestock Fence Calculator
Calculate the number of posts, wire rolls, and total material cost needed for a livestock fence.
Open calculator →Llama Gestation Calculator
Estimate a llama or alpaca due date range from the number of days since mating.
Open calculator →Log Reduction Calculator
Calculate log reduction and percentage reduction in microorganism count from initial and final CFU counts.
Open calculator →Metacam Dosage Calculator for Cats
Calculate a weight-based Metacam (meloxicam) dose estimate for cats. Not a substitute for veterinary advice -- always consult your veterinarian.
Open calculator →Molar Mass Calculator
Calculate the molar mass of a compound from its count of carbon, hydrogen, oxygen, and nitrogen atoms.
Open calculator →Molarity Calculator
Calculate the molarity of a solution from moles of solute and volume of solution.
Open calculator →Mutation Frequency Calculator
Calculate the mutation frequency in a cell culture from the number of observed mutants and total cells.
Open calculator →Omega-3 Dosage Calculator for Dogs
Calculate a metabolic-weight-based omega-3 supplement dose for dogs by purpose. Consult your veterinarian before starting any supplement.
Open calculator →Osmolarity Calculator
Calculate the osmolarity of a solution from solute concentration and dissociation factor.
Open calculator →PCR Annealing Temperature Calculator
Calculate the optimal PCR annealing temperature from primer and target melting temperatures.
Open calculator →Pet Sitter Rates Calculator
Calculate an hourly pet-sitting rate from total cost, hours per day, and number of days.
Open calculator →pH Calculator
Calculate the pH of a solution from its hydrogen ion concentration.
Open calculator →Pine Straw Calculator
Calculate how many bales of pine straw mulch are needed to cover a given area.
Open calculator →Plant Population Calculator
Calculate total plant population for a field from field size, plant spacing, row spacing, and walkway width.
Open calculator →Potting Soil Calculator
Calculate how much potting soil is needed to fill rectangular or round containers.
Open calculator →Protein Concentration Calculator
Calculate protein concentration from an absorbance reading using the Beer-Lambert law.
Open calculator →Protein Molecular Weight Calculator
Calculate the molecular weight of a 5-amino-acid peptide chain from its amino acid sequence.
Open calculator →Punnett Square Calculator
Predict offspring genotype probabilities for a single gene from two parent genotypes using a Punnett square.
Open calculator →qPCR Efficiency Calculator
Calculate qPCR amplification efficiency and amplification factor from a standard curve slope.
Open calculator →Rabbit Cage Size Calculator
Calculate the minimum recommended rabbit cage dimensions and daily exercise area from the rabbit own measurements.
Open calculator →Rabbit Gestation Calculator
Estimate a rabbit due date range from the number of days since conception.
Open calculator →Rat Cage Calculator
Calculate cage volume and the maximum number of pet rats it can comfortably house.
Open calculator →Sheep Gestation Calculator
Estimate a ewe lambing date range from the number of days since mating.
Open calculator →Sod Calculator
Calculate how many rolls of sod are needed and the total cost, including a waste factor allowance.
Open calculator →Stoichiometry Calculator
Calculate moles of product formed from a given amount of reactant using a mole ratio.
Open calculator →Swine Gestation Calculator
Estimate a sow farrowing date range from the number of days since breeding.
Open calculator →Tramadol Dosage Calculator for Dogs
Calculate a weight-based tramadol dose range for dogs, based on published BSAVA guidance. Not a substitute for veterinary advice -- tramadol should only be given when prescribed by a veterinarian.
Open calculator →Tree Diameter Calculator
Calculate a tree trunk diameter from its measured circumference.
Open calculator →Tree Height Calculator
Calculate tree height using distance and angle measurements, for trees level with, above, or below the viewer.
Open calculator →Tree Leaves Calculator
Estimate the total number of leaves on a tree from a sample leaf count and the tree crown size.
Open calculator →Tree Spacing Calculator
Calculate how many trees fit in a planting area at a given rectangular grid spacing.
Open calculator →Tree Value Calculator
Estimate the appraised dollar value of a tree from its circumference, height, and species value factor.
Open calculator →Trihybrid Cross Calculator
Predict all 27 possible offspring genotype probabilities for three independent genes at once from two parent genotypes.
Open calculator →Turtle Tank Size Calculator
Calculate the minimum recommended tank size for a pet turtle based on its shell length.
Open calculator →Vapor Pressure Deficit Calculator
Calculate vapor pressure deficit for a plant canopy from air temperature, leaf temperature, and relative humidity.
Open calculator →Vegetable Seed Calculator
Calculate how many vegetable seeds are needed for a row garden from row length, seed spacing, and number of rows.
Open calculator →Vegetable Yield Calculator
Estimate total vegetable harvest yield from the number of plants and an expected yield per plant.
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