Series MI-09 · 111 instruments catalogued
Biology
From cell counts to field ecology, quantified.
In Service
74 built and verifiedAcres Per Hour Calculator
Estimate theoretical field capacity in acres per hour from implement width and travel speed, the number every field-day schedule starts from.
In service MI-09-002Allele Frequency Calculator
Compute an allele's frequency (p) and its complement (q) from a direct count of dominant and total allele copies — a basic population-genetics ratio.
In service MI-09-003Animal Mortality Rate Calculator
Turn a deaths-over-population count into a mortality-rate percentage, the standard livestock metric for tracking outbreaks and management quality.
In service MI-09-005Basal Area Calculator
Convert a tree's diameter at breast height into basal area in square feet using the forester's constant 0.005454, the standard forestry-mensuration formula.
In service MI-09-006Benadryl Dosage Calculator for Dogs
Estimate a diphenhydramine (Benadryl) dose range for a dog from body weight, using the commonly cited 2–4 mg/kg oral range — plus when to call your vet first.
In service MI-09-009Cat Age Calculator
Convert a cat's age to human-equivalent years with the AAHA/AAFP feline life-stage scale: a fast first year, rapid year two, then a steady adult pace.
In service MI-09-010Cat Benadryl Dosage Calculator
Estimate a diphenhydramine dose range for a cat from body weight, using the 2–3 mg/kg range AAHA cites for cats — lower than the dog range — plus vet guidance.
In service MI-09-011Cat BMI Calculator
Estimate a cat's body fat with the Feline Body Mass Index, from rib cage circumference and leg length — a method developed by Hawthorne and Butterwick.
In service MI-09-013Cat Chocolate Toxicity Calculator
Estimate the theobromine + caffeine dose, mg/kg, for a cat from chocolate type and amount — thresholds extrapolated from canine data; cats are more sensitive.
In service MI-09-014Cat Pregnancy Calculator
Estimate a queen's kitten due date by adding the average 64-day feline gestation to the breeding date — a tight window among common companion animals.
In service MI-09-015Cat Quality of Life Calculator
Score your cat across the seven Villalobos HHHHHMM categories, built for a species that hides discomfort well, against the published over-35 threshold.
In service MI-09-018Cell Dilution Calculator
Work out how much volume a cell suspension needs to reach a target concentration, using the C1V1=C2V2 rule behind every dilution and serial dilution.
In service MI-09-019Cell Doubling Time Calculator
Back-calculate a doubling time from an actual growth-curve observation: starting count, ending count and elapsed time yield the doubling time itself.
In service MI-09-020Cephalexin For Cats Dosage Calculator
Cephalexin for cats is off-label — no FDA-approved feline product exists. Estimates Merck's general 15–35 mg/kg range from weight, for vet confirmation.
In service MI-09-021Cephalexin For Dogs Dosage Calculator
Two figures, not one: Merck's general 15–45 mg/kg cephalexin range for dogs, plus the FDA-approved Rilexine label dose of 22 mg/kg for pyoderma.
In service MI-09-025Cow Gestation Calculator
Project a calving date from a cow's breeding date using the standard 283-day bovine gestation figure central to dairy and beef breeding calendars.
In service MI-09-027Crickets Chirping Thermometer
Turn a minute of cricket chirp counting into an estimated air temperature using Dolbear's Law, the 1897 formula behind the classic backyard trick.
In service MI-09-028Daily Light Integral Calculator
Convert PPFD and photoperiod into Daily Light Integral, the total photosynthetic photons a crop receives per day, the number growers plan lighting around.
In service MI-09-029Dihybrid Cross Calculator - Punnett Square
Pick two parent genotypes across two genes and read the offspring phenotype-class ratio, from the classic 9:3:3:1 cross to a testcross's even 1:1:1:1 split.
In service MI-09-030DNA Concentration Calculator
Convert a UV-spectrophotometer A260 absorbance reading into a dsDNA concentration in ng/µL, factoring in any dilution used to keep the reading in range.
In service MI-09-031DNA Copy Number Calculator
Convert a DNA mass and fragment length into the number of DNA molecules present, using Avogadro's number and the average 650 g/mol weight of a base pair.
In service MI-09-033Dog Age Calculator
Convert a dog's age to human-equivalent years using the 2020 DNA-methylation formula: 16 x ln(dog years) + 31 — steep in puppyhood, flatter in old age.
In service MI-09-035Dog Chocolate Toxicity Calculator
Estimate the theobromine + caffeine dose, in mg/kg, from chocolate type and amount eaten — then compare against mild, moderate, and severe reference bands.
In service MI-09-036Dog Crate Size Calculator
Four body measurements in, minimum airline-compliant crate dimensions out — the IATA CR1 formula used to size crates for flying with a dog.
In service MI-09-039Dog Heat Cycle Calculator
Look up the four stages of a dog's heat cycle — proestrus, estrus, diestrus, and anestrus — with typical durations sourced from Cornell and VIN references.
In service MI-09-040Dog Life Expectancy Calculator
Look up published life expectancy at birth for six breeds from a 30,563-dog UK veterinary-record study — a real population figure, not a guess or a formula.
In service MI-09-042Dog Onion Toxicity Calculator
Estimate the raw onion dose your dog ate, in grams per kg, and compare it to Merck's cited 15–30 g/kg clinical-signs threshold for Allium toxicosis.
In service MI-09-043Dog Pregnancy Calculator
Estimate a dam's whelping date by adding the average 63-day canine gestation to the breeding date — a figure that holds steady across breeds of any size.
In service MI-09-044Dog Quality of Life Calculator
Score seven Villalobos HHHHHMM hospice categories — Hurt, Hunger, Hydration, Hygiene, Happiness, Mobility, More good days — against the published 35-point line.
In service MI-09-045Dog Raisin Toxicity Calculator
Any known or suspected grape or raisin ingestion warrants an immediate vet or poison-control call, regardless of amount — no safe dose has been established.
In service MI-09-046Dog Size Calculator
Enter a dog's weight in pounds to see which informal size class it falls into — toy, small, medium, large, or giant — using a commonly cited weight convention.
In service MI-09-047Dog Water Intake Calculator
Body weight in, daily water target out — the NRC metabolic-body-weight formula (132 x kg^0.75) behind veterinary fluid-requirement charts.
In service MI-09-048Dry Matter Calculator
Calculate dry matter percentage from wet (as-fed) and dry weights — the single ratio that turns a scale reading into usable hay, silage or feed nutrition math.
In service MI-09-049Feed Conversion Ratio Calculator
Calculate Feed Conversion Ratio, the standard livestock and aquaculture efficiency metric: feed intake divided by weight gain, lower means more efficient.
In service MI-09-050Fertilizer Calculator
Work out how many pounds of fertilizer product to apply from a desired nitrogen rate, the product's %N, and treated area — the core turf application formula.
In service MI-09-051Fish Oil Dosage Calculator For Cats
A lower-confidence, extrapolated ~30 mg/kg EPA+DHA estimate for cats — no feline dose-titration study exists like the dog one. Prefer a labeled product's dose.
In service MI-09-052GDU Calculator — Growing Degree Units
Calculate corn Growing Degree Units from daily high and low temperature using the modified 86°F/50°F cap-and-floor method farmers use to track crop development.
In service MI-09-053Generation Time Calculator
Project a bacterial population forward with exponential growth: starting count, doubling time and elapsed time predict how large the culture becomes.
In service MI-09-054Goat Gestation Calculator
Estimate a doe's kidding date by adding the standard 150-day caprine gestation to the breeding date that most goat breeders plan kidding season around.
In service MI-09-055Grain Bin Calculator
Find a round grain bin's storage capacity in bushels from diameter, straight-wall height and optional cone/peak height, using the standard bushel-cu-ft factor.
In service MI-09-056Grain Conversion Calculator
Convert bushels to pounds using each crop's USDA standard test weight — 56 lb/bu for corn, 60 lb/bu for wheat and soybeans — instead of one generic figure.
In service MI-09-058Guinea Pig Pregnancy Calculator
Estimate a guinea pig sow's due date from the breeding date using the standard 65-day gestation midpoint, with the full 59–72 day range explained.
In service MI-09-061Hardy-Weinberg Equilibrium Calculator
Enter a dominant allele frequency (p) to get q and the expected AA, Aa and aa genotype frequencies a population would show at Hardy-Weinberg equilibrium.
In service MI-09-064Lawn Mowing Cost Calculator
Estimate a mowing job's price by multiplying acreage by a per-acre rate — the same math custom operators and lawn crews use to quote a job.
In service MI-09-065Ligation Calculator
Calculate the insert DNA mass needed for a cloning ligation from vector mass, vector and insert length, and your target insert:vector molar ratio.
In service MI-09-066Livestock Fence Cost Calculator
Work out how many fence posts an open run needs from total perimeter and post spacing, using the span-plus-one rule that ag-extension fencing guides teach.
In service MI-09-067Llama Calculator
Estimate a llama's due date from the breeding date using the standard 350-day camelid gestation average, with induced ovulation explained.
In service MI-09-068Log Reduction Calculator
Calculate log reduction from initial and final microbial population counts — the standard log10(N0/Nt) measure used in disinfection validation.
In service MI-09-069Mare Gestation Calculator - Horse Gestation
Estimate a mare's foaling date from the breeding date using the average 340-day equine gestation, with the unusually wide normal range explained.
In service MI-09-071Metacam Dosage Calculator for Dogs
Compute the FDA-approved Metacam regimen for dogs: a Day 1 loading dose of 0.2 mg/kg, then 0.1 mg/kg daily after. Dogs only — cat boxed-warning note inside.
In service MI-09-072MLVSS Calculator
Convert MLSS and its volatile solids fraction into MLVSS, the wastewater reading operators use to estimate active microorganism mass in the aeration basin.
In service MI-09-073Mulch Calculator
Find how much bulk mulch a bed needs: enter its area and depth and this instrument converts inches of coverage into cubic yards for ordering.
In service MI-09-074Mutation Frequency Calculator
Calculate mutation frequency by dividing the number of mutants observed by the total population screened — the standard mutagenesis-assay measure.
In service MI-09-075Omega-3 For Dogs Calculator
Omega-3 EPA+DHA for dogs is dosed by metabolic body weight, not simple mg/kg — 230–370 mg per kg of weight to the 0.75 power, per two vet studies.
In service MI-09-076Pet Sitter Rates Calculator
Add up a pet sitter's total charge from a per-visit rate, visits per day, and trip length — the standard way independent sitters bill.
In service MI-09-078Plant Population Calculator
Turn row spacing and in-row plant spacing into plants per acre — the area-per-plant math row-crop growers use to check a planter's population.
In service MI-09-080Potting Soil Calculator
Work out how many bags of potting mix to buy: enter container volume, container count, and bag size, and this instrument rounds up to a whole bag.
In service MI-09-081Protein Concentration Calculator
Calculate protein concentration from UV absorbance, molar extinction coefficient, and path length using the Beer-Lambert law: c = A / (ε × l).
In service MI-09-083Punnett Square Calculator
Pick two parent genotypes for a single gene and get the offspring genotype ratio a monohybrid Punnett square predicts, from AA×aa to the classic Aa×Aa cross.
In service MI-09-084qPCR Efficiency Calculator
Convert a qPCR standard-curve slope into amplification efficiency, as a fraction and as a percentage, using E = 10^(-1/slope) − 1.
In service MI-09-087Rabbit Cage Size Calculator
Body length in, minimum and recommended resting-cage length out — House Rabbit Society's 3-4x rule. Exercise time outside the cage is separate and mandatory.
In service MI-09-089Rabbit Gestation Calculator
Estimate a doe's kindling date from the breeding date using the standard 31-day rabbit gestation — the shortest common livestock pregnancy.
In service MI-09-090Raised Bed Soil Calculator
Find how much bulk soil a raised bed needs: enter length, width and fill depth in feet, and this instrument converts the box volume into cubic yards.
In service MI-09-093Sheep Gestation Calculator
Estimate a ewe's lambing date from the breeding date using the standard 147-day ovine gestation, with seasonal breeding patterns explained.
In service MI-09-096Swine Gestation Calculator
Estimate a sow's farrowing date from the breeding date using the classic 'three months, three weeks, three days' 114-day swine gestation.
In service MI-09-097Tramadol For Dogs Calculator
A commonly cited 2–5 mg/kg tramadol range for dogs — and why current veterinary research genuinely questions whether oral tramadol relieves pain in dogs at all.
In service MI-09-098Tree Age Calculator
Estimate a standing tree's age from trunk diameter and species using the Morton Arboretum growth-factor method — a rough rule of thumb, not tree-ring dating.
In service MI-09-099Tree Diameter Calculator
Convert a trunk's circumference reading into diameter at breast height by dividing by pi — the standard forestry shortcut for measuring DBH.
In service MI-09-100Tree Height Calculator
Measure a tree's height without climbing it: enter distance from the trunk, angle to the treetop, and eye height for the standard clinometer trig.
In service MI-09-103Tree Value Calculator
Estimate an appraised tree value with the CTLA Trunk Formula Method — an educational simplification, not a substitute for a certified arborist's appraisal.
In service MI-09-104Trihybrid Cross Calculator - Punnett Square
Pick two parent genotypes across three genes and get the phenotype-class ratio a trihybrid cross predicts, extending the classic dihybrid 9:3:3:1 pattern.
In service MI-09-105Turtle Tank Size Calculator
Convert a turtle's shell length into a minimum tank size using the classic '10 gallons per inch' rule — repeated by vets, but not a validated standard.
In service MI-09-108VPD Calculator (Vapor Pressure Deficit)
Turn air temperature and relative humidity into vapor pressure deficit using the FAO-56 Tetens formula — the metric growers track instead of RH.
In service MI-09-110Water Potential Calculator
Add a plant cell's pressure potential and osmotic potential to find total water potential — the value that predicts which way water moves.
In serviceOn the Board
37 catalogued · not yet builtThese sheets are numbered and queued. They are listed for transparency about what this series will contain — they are not links yet, because nothing here ships before its formula is verified twice.
- MI-09-004 Annealing Temperature Calculator
- MI-09-007 Bird Age Calculator
- MI-09-008 Bulb Spacing Calculator
- MI-09-012 Cat Calorie Calculator
- MI-09-016 Catculator
- MI-09-017 Cattle per Acre Calculator
- MI-09-026 CO₂ Grow Room Calculator
- MI-09-022 Compost Calculator
- MI-09-023 Corn Yield Calculator
- MI-09-024 Cost of Owning a Dog Calculator
- MI-09-032 DNA to mRNA Converter
- MI-09-034 Dog BMI Calculator
- MI-09-037 Dog Food Calculator
- MI-09-038 Dog Harness Size Calculator
- MI-09-041 Dog Nutrition Calculator
- MI-09-057 Grass Seed Calculator
- MI-09-059 Guinea Pig Years to Human Years Calculator
- MI-09-060 Hamster Age Calculator
- MI-09-062 Horse Weight Calculator
- MI-09-063 How Big Will My Cat Get Calculator 🐱
- MI-09-070 Metacam Dosage Calculator for Cats
- MI-09-077 Pine Straw Calculator
- MI-09-079 Plant Spacing Calculator
- MI-09-082 Protein Molecular Weight Calculator
- MI-09-085 Quiz: Cat Age Calculator
- MI-09-086 Quiz: Dog Size Calculator
- MI-09-088 Rabbit Color Calculator
- MI-09-091 Rat Cage Calculator
- MI-09-092 Raw Dog Food Calculator
- MI-09-094 Sod Calculator
- MI-09-095 Soil Calculator
- MI-09-101 Tree Leaves Calculator
- MI-09-102 Tree Spacing Calculator
- MI-09-106 Vegetable Seed Calculator
- MI-09-107 Vegetable Yield Calculator
- MI-09-109 Wastewater Calculator
- MI-09-111 Water Soluble Fertilizer Calculator