Genetics, field work, and life-science measurements.
Genetics problems, forestry measurements, and lab estimates all come down to a handful of published formulas that most calculators bury in a general science catch-all - these tools apply them directly to your own counts and measurements, from allele frequencies worked out from a real sample to acres covered per hour in the field.
Calculate field work rate in acres per hour from working width, travel speed, and field efficiency.
Calculate observed allele frequencies (p and q) from genotype counts in a sample population.
Calculate mortality rate and survival rate from a population at risk and number of deaths.
Estimate a starting PCR primer annealing temperature from forward and reverse primer melting temperatures.
Calculate forestry basal area per tree and total basal area from diameter at breast height (DBH).
Estimate how many bulbs you need for a planting area based on bulb spacing.
Estimate grazing stocking rate (cattle per acre or acres per animal) from forage production, utilization, and…
Calculate the stock volume and diluent needed for a target concentration using the C1V1 = C2V2 dilution…
Estimate population doubling time and growth rate from cell counts measured at two time points, assuming…
Estimate corn yield in bushels per acre from ears per acre, kernel counts, and an average kernel-weight…
Estimate a cow's calving date from the breeding date, using the typical cattle gestation period.
Calculate grow room volume and the theoretical CO2 needed to raise concentration for plant growth - an…
Estimate ambient temperature from cricket chirp rate using a commonly cited empirical relationship.
Calculate Daily Light Integral (DLI) from PPFD and photoperiod, for plant lighting planning.
Calculate offspring genotype and phenotype ratios for one-gene (Punnett), two-gene (dihybrid), or three-gene…
Calculate nucleic acid concentration from A260 absorbance, dilution factor, and nucleic acid type.
Estimate the number of DNA molecules (copies) from DNA mass and fragment or plasmid length in base pairs.
Convert a DNA sequence to its corresponding mRNA sequence, for either the coding strand or the template…
Find dry matter percentage and weight from moisture content, and convert a nutrient from an as-fed to a…
Calculate feed conversion ratio (FCR) from feed consumed and weight gained, plus the inverse feed efficiency.
Calculate daily and cumulative growing degree units (GDU) from high and low temperatures and a base…
Estimate a doe's kidding date and expected window from the breeding date, using an average 150-day goat…
Estimate the volume and bushel capacity of a round grain bin from its diameter and grain depth.
Convert grain between bushels, pounds, kilograms, and tons using standard reference bushel weights for common…
Calculate the insert DNA mass needed for a desired insert:vector molar ratio from vector mass and vector and…
Estimate a llama or alpaca's due date and expected window from the breeding date, using an average 342-day…
Calculate microbiological log reduction and percentage reduction from an initial and final viable count.
Estimate a mare's foaling date and expected window from the breeding date, using an average 340-day equine…
Calculate Mixed Liquor Volatile Suspended Solids (MLVSS) from a measured MLSS concentration and volatile…
Calculate mutation frequency as the fraction of observed mutants in a population, as a decimal, percentage,…
Estimate crop plant population per acre or hectare from row spacing and in-row spacing, or solve for the…
Calculate protein concentration from mass and volume, or from an A280 absorbance reading with your own…
Estimate a protein or peptide's molecular weight in Da and kDa from its amino acid sequence using standard…
Calculate amplification efficiency from a qPCR standard curve slope, and see the amplification factor per…
Estimate simplified rabbit coat color outcomes from two well-known loci (agouti and black/chocolate) using…
Estimate a rabbit doe's kindling date and expected window from the breeding date, using an average 31-day…
Estimate a ewe's lambing date and expected window from the breeding date, using an average 147-day sheep…
Estimate a sow's farrowing date and expected window from the breeding date, using the common 114-day (3…
Estimate a tree's age from its trunk diameter or circumference and a growth factor you supply for the species.
Estimate tree height from a distance and angle measurement, or from the shadow of a stick of known height.
Roughly estimate the number of leaves on a tree by counting a sample branch and scaling up.
Calculate a simple tree value from quantity, price per unit, and costs that you enter. It is arithmetic, not…
Calculate how many vegetable seeds and seed packets you need for your rows, spacing, and germination rate.
Estimate total vegetable harvest from plant count or growing area using the yield per plant or per area that…
Calculate vapor pressure deficit (VPD) in kPa from air temperature and relative humidity, with saturation and…
Calculate BOD or COD loading, food-to-microorganism (F/M) ratio, or hydraulic retention time from flow,…
Calculate total water potential (Ψ) from solute and pressure potential, or estimate solute potential from…
Calculate the theoretical nutrient concentration (mg/L or ppm) from fertilizer mass, final volume, and label…
Estimate crude protein percentage from measured nitrogen percentage and a nitrogen-to-protein conversion…
Calculate enzyme activity in units (U), activity concentration (U/mL), and specific activity (U/mg protein)…