Biology Calculators

Biology tools for genetics, cell and molecular biology, ecology, and life-science calculations.

Tools

Allele Frequency Calculator Allele Frequency Calculator is a biology calculator that helps you calculate allele frequency values from your input data. The formula used is: f = c/λ. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Animal Mortality Rate Calculator Animal Mortality Rate Calculator is a biology calculator that helps you calculate animal mortality rate values from your input data. The formula used is: (Part ÷ Whole) × 100. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Bacteria Growth Calculator Bacteria Growth Calculator is a biology calculator that helps you calculate bacteria growth values from your input data. The formula used is: P = P₀(1 + r)^t. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Cat Benadryl Dosage Calculator Cat Benadryl Dosage Calculator is a biology calculator that helps you calculate the safe Benadryl (diphenhydramine) dose for a cat based on its body weight. The formula used is: ADR = 1 / Recovery Period. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Cat Bmi Calculator Cat Bmi Calculator is a biology calculator that helps you calculate your Body Mass Index from height and weight. The formula used is: BMI = Weight ÷ Height². Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Cat Calorie Calculator Cat Calorie Calculator is a biology calculator that helps you calculate calorie values based on body data or activity level. The formula used is: Q = mcΔT. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Cat Pregnancy Calculator Cat Pregnancy Calculator is a biology calculator that helps you calculate a pregnancy or fetal development metric. The formula used is: Result = (Input 1 + Input 2) ÷ 2. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Cattle Per Acre Calculator Cattle Per Acre Calculator is a biology calculator that helps you calculate cattle per acre values from your input data. The formula used is: ACR = Albumin ÷ Creatinine. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Cell Dilution Calculator Cell Dilution Calculator is a biology calculator that helps you calculate cell dilution values from your input data. The formula used is: C1V1 = C2V2. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Cell Doubling Time Calculator Cell Doubling Time Calculator is a biology calculator that helps you calculate cell doubling time values from your input data. The formula used is: Doubling Time ≈ 70 / Growth Rate %. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Cephalexin For Cats Dosage Calculator Cephalexin For Cats Dosage Calculator is a biology calculator that helps you calculate the correct cephalexin dose for a cat based on its body weight. The formula used is: pH = -log[H+]. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Cephalexin For Dogs Dosage Calculator Cephalexin For Dogs Dosage Calculator is a biology calculator that helps you calculate the correct cephalexin dose for a dog based on its body weight. The formula used is: pH = -log[H+]. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Co2 Grow Room Calculator Co2 Grow Room Calculator is a biology calculator that helps you calculate co2 grow room values from your input data. The formula used is: CF = Fuel × CO₂ Factor. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Daily Light Integral Dli Calculator Daily Light Integral Dli Calculator is a biology calculator that helps you calculate daily light integral dli values from your input data. The formula used is: λ = c/f. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Dihybrid Cross Punnett Square Calculator Dihybrid Cross Punnett Square Calculator is a biology calculator that helps you calculate dihybrid cross punnett square values from your input data. The formula used is: N². Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Dog Bmi Calculator Dog Bmi Calculator is a biology calculator that helps you calculate your Body Mass Index from height and weight. The formula used is: BMI = Weight ÷ Height². Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Dog Calorie Calculator Dog Calorie Calculator is a biology calculator that helps you calculate calorie values based on body data or activity level. The formula used is: Q = mcΔT. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Dog Heat Cycle Calculator Dog Heat Cycle Calculator is a biology calculator that helps you calculate dog heat cycle values from your input data. The formula used is: Q = mcΔT. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Dog Life Expectancy Calculator Dog Life Expectancy Calculator is a biology calculator that helps you calculate dog life expectancy values from your input data. The formula used is: Result = (Input 1 + Input 2) ÷ 2. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Dog Pregnancy Calculator Dog Pregnancy Calculator is a biology calculator that helps you calculate a pregnancy or fetal development metric. The formula used is: Result = (Input 1 + Input 2) ÷ 2. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Dog Water Intake Calculator Dog Water Intake Calculator is a biology calculator that helps you calculate dog water intake values from your input data. The formula used is: Hardness = (Ca/40 + Mg/24) × 100. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Fish Oil Dosage For Cats Calculator Fish Oil Dosage For Cats Calculator is a biology calculator that helps you calculate the recommended fish oil (omega-3) dose for a cat based on its body weight. The formula used is: Max daily: 660 mg. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Grain Conversion Calculator Grain Conversion Calculator is a biology calculator that helps you calculate a measurement from one unit to an equivalent in another unit. The formula used is: Converted Value = Input Value × Conversion Multiplier. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Guinea Pig Pregnancy Calculator Guinea Pig Pregnancy Calculator is a biology calculator that helps you calculate a pregnancy or fetal development metric. The formula used is: Result = (Input 1 + Input 2) ÷ 2. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Horse Weight Calculator Horse Weight Calculator is a biology calculator that helps you calculate weight values or weight conversions between unit systems. The formula used is: BMI = Weight ÷ Height². Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Log Reduction Calculator Log Reduction Calculator is a biology calculator that helps you calculate log reduction values from your input data. The formula used is: Antilog = b^x. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Metacam Dosage Cat Calculator Metacam Dosage Cat Calculator is a biology calculator that helps you calculate the correct Metacam (meloxicam) dose for a cat based on its body weight. The formula used is: Max daily: 660 mg. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Mowing Cost Calculator Mowing Cost Calculator is a biology calculator that helps you calculate mowing cost values from your input data. The formula used is: Tax = Amount × (Rate% ÷ 100). Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Plant Population Calculator Plant Population Calculator is a biology calculator that helps you calculate plant population values from your input data. The formula used is: P = P₀(1 + r)^t. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. The Cost Of Owning A Dog Calculator The Cost Of Owning A Dog Calculator is a biology calculator that helps you calculate the cost of owning a dog values from your input data. The formula used is: Tax = Amount × (Rate% ÷ 100). Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Trihybrid Cross Punnett Square Calculator Trihybrid Cross Punnett Square Calculator is a biology calculator that helps you calculate trihybrid cross punnett square values from your input data. The formula used is: N². Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Vapor Pressure Deficit Calculator Vapor Pressure Deficit Calculator is a biology calculator that helps you calculate a blood-related health metric. The formula used is: P = F/A. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Wastewater Calculator Wastewater Calculator is a biology calculator that helps you calculate wastewater values from your input data. The formula used is: Hardness = (Ca/40 + Mg/24) × 100. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Water Potential Calculator Water Potential Calculator is a biology calculator that helps you calculate mechanical energy from mass and velocity or height. The formula used is: PE = mgh. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Water Soluble Fertilizer Calculator Water Soluble Fertilizer Calculator is a biology calculator that helps you calculate water soluble fertilizer values from your input data. The formula used is: Hardness = (Ca/40 + Mg/24) × 100. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled.

Molecular Biology

Annealing Temperature Calculator The Annealing Temperature Calculator estimates the PCR annealing temperature from your primers' melting temperatures (Tm). It takes the lower of the two primer Tm values and subtracts an offset, then suggests a gradient range to optimise. The formula used is: annealing temp ≈ min(Tm_forward, Tm_reverse) − offset.

Gardening

Bulb Spacing Calculator Calculate how many flower bulbs you need to fill a garden bed based on planting area and recommended spacing. Potato Yield Calculator Estimate potato yield from seed and row data. Formula: Yield (lbs) = plants × avg_weight.

Veterinary Medicine

Cat Chocolate Toxicity Calculator Estimate the theobromine dose a cat received from eating chocolate and assess the risk level. Cat Quality Of Life Calculator Score your cat's quality of life using the HHHHHMM scale (Hurt, Hunger, Hydration, Hygiene, Happiness, Mobility, More good days).

Lab

DNA Concentration Calculator The DNA Concentration Calculator estimates double-stranded DNA concentration from A260 absorbance, using the standard factor of 50 µg/mL per absorbance unit and your dilution factor.

Genetics

Hardy-Weinberg Calculator Hardy-Weinberg Calculator is a biology calculator that helps you calculate hardy-weinberg values from your input data. The formula used is: q = 1 - p, genotype frequencies: p^2, 2pq, q^2. Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled. Punnett Square Calculator Calculate genetic cross probabilities using a Punnett square. Determines offspring genotype ratios from parent alleles for single-gene inheritance patterns.

Ecology

Population Growth Calculator Population Growth Calculator is a biology calculator that helps you calculate population growth values from your input data. The formula used is: N(t) = N0 x e^(r x t). Uses standard biological units (e.g. g, mg, mmol/L) unless otherwise labelled.

Analysis

Protein Concentration Calculator Calculate protein concentration from sample mass and volume. Converts between units: g/dL, mg/mL, mg/dL, mmol/L. Used in lab analysis, medical testing, and biochemistry. Protein Molecular Weight Calculator Calculate protein molecular weight from amino acid composition. Converts between daltons (Da), kilodaltons (kDa), and megadaltons (MDa). Used in biochemistry, protein analysis, and molecular biology.

Compost Calculator Calculate the right balance of green and brown materials to achieve an ideal carbon-to-nitrogen (C:N) ratio for fast composting. Corn Yield Calculator Estimate corn field yield in bushels per acre using the standard ear count method (kernels per ear and ears per 1/1000 acre). Cow Gestation Calculator Calculate the expected calving date based on the breeding date. Average bovine gestation is 283 days. Cricket Chirp Thermometer Calculator Use Dolbear's Law to estimate outdoor temperature from the number of cricket chirps per minute. Dna Copy Number Calculator Calculate the number of DNA copies per microliter from a known concentration and fragment length. Dna To Mrna Calculator Transcribe a DNA template strand to its complementary mRNA sequence (A→U, T→A, G→C, C→G). Dog Chocolate Toxicity Calculator Estimate the theobromine dose your dog received from chocolate and assess the toxicity risk level. Dog Food Calculator Calculate how much food to feed your dog daily based on weight, age, and activity level using the Resting Energy Requirement (RER) formula. Dog Harness Size Calculator Find the right dog harness size based on your dog's chest girth and weight. Dog Metacam Calculator Calculate the Metacam (meloxicam) dose for dogs based on body weight for pain and inflammation management. Dog Onion Toxicity Calculator Assess the risk level if your dog ate onions, garlic, or other allium vegetables. Dog Quality Of Life Calculator Evaluate your dog's quality of life using the HHHHHMM scale to guide care decisions for aging or ill pets. Dog Raisin Toxicity Calculator Assess the risk when a dog eats grapes or raisins. No safe dose is known — any amount can be toxic. Dog Size Calculator Predict your puppy's adult weight based on their current weight and age. Dry Matter Calculator Compare pet food nutrients on a dry matter basis to make accurate comparisons between wet and dry food. Fcr Calculator Calculate the Feed Conversion Ratio (FCR) — the amount of feed required to produce one unit of weight gain in livestock. Fertilizer Calculator Calculate how many pounds of fertilizer to apply based on lawn area, desired nitrogen rate, and fertilizer NPK content. Gdu Calculator Calculate Growing Degree Units (GDUs) accumulated per day — a measure of heat accumulation used to predict crop and plant development. Goat Gestation Calculator Calculate the expected kidding date based on the mating date. Average goat gestation is 150 days. Grain Bin Calculator Calculate the bushel capacity of a cylindrical grain bin based on its diameter and grain depth. Grass Seed Calculator Calculate how many pounds of grass seed you need to seed or overseed your lawn. Horse Gestation Calculator Calculate the expected foaling date based on the breeding date. Average equine gestation is 340 days. How Big Will My Cat Get Calculator Estimate your kitten's adult weight based on their current age and weight. Ligation Calculator Calculate the amount of insert DNA needed for a ligation reaction based on vector amount, sizes, and desired molar ratio. Livestock Fence Calculator Calculate the amount of fencing materials (posts, wire, staples) needed to fence a pasture for livestock. Llama Calculator Calculate daily feed requirements, fiber yield, and gestation period for llamas. Mlvss Calculator Calculate Mixed Liquor Volatile Suspended Solids (MLVSS) from MLSS and the VSS/TSS ratio in a wastewater aeration basin. Mulch Calculator Calculate how many cubic yards of mulch you need to cover a garden bed to a desired depth. Omega 3 For Dogs Calculator Calculate the recommended daily EPA+DHA omega-3 dose for dogs based on body weight and health goal. Pine Straw Calculator Calculate how many bales of pine straw are needed to cover a garden bed or landscape area. Plants Calculator Calculate how many plants are needed to fill a garden bed based on the area and recommended plant spacing. Potting Soil Calculator Calculator Calculate the volume of potting soil needed to fill a rectangular planter or round pot. Qpcr Efficiency Calculator Calculate qPCR amplification efficiency from the slope of the standard curve. Rabbit Color Calculator Predict the probability of coat color outcomes in rabbit offspring using basic Mendelian genetics for the black (B/b) locus. Rabbit Gestation Calculator Calculate the expected kindling (birth) date for a rabbit based on the breeding date. Average rabbit gestation is 31 days. Raw Dog Food Calculator Calculate the daily raw food amount for your dog based on body weight and life stage — typically 2–3% of body weight. Sheep Gestation Calculator Calculate the expected lambing date based on the breeding date. Average ovine gestation is 147 days. Swine Gestation Calculator Calculate the expected farrowing date based on the breeding date. Swine gestation averages 114 days (3 months, 3 weeks, 3 days). Tramadol For Dogs Calculator Calculate the appropriate tramadol dose for dogs based on body weight for pain management. Tree Diameter Calculator Calculate a tree's diameter at breast height (DBH) from its trunk circumference, or vice versa. Tree Leaves Calculator Estimate the number of leaves on a deciduous tree based on its crown dimensions and leaf density. Tree Spacing Calculator Calculate how many trees can be planted per acre or in a defined area with a given spacing. Tree Value Calculator Estimate the monetary value of a landscape tree using the Council of Tree and Landscape Appraisers (CTLA) trunk formula method. Turtle Tank Calculator Calculate the minimum recommended aquarium size for a pet turtle based on shell length. Vaccine Production Vaccine Production is a fast, free biology calculator. Enter Dose Size (mL) and Target Doses (millions) to get an instant, accurate result — complete with the formula, a step-by-step worked example, and answers to common questions, all on one page and private to your browser. Vegetable Seed Calculator Calculate how many vegetable seeds to sow for a given row length or area based on plant spacing and germination rate. Vegetable Yield Calculator Estimate vegetable garden yield based on bed area and vegetable type using standard yield-per-square-foot data.