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Science & Engineering
253 calculators
∑ All Chemistry → 100+ Calculators Browse 100+ chemistry calculators — stoichiometry, thermodynamics, kinetics, equilibrium, acid-base, electrochemistry.
pH pH Calculator Calculate pH, pOH, and ion concentration.
M Molarity Calculator Calculate molarity, moles, mass, and volume.
pH= Henderson-Hasselbalch Calculate pH of buffer solutions.
M1V1 Dilution (M₁V₁=M₂V₂) Calculate dilution concentrations and volumes.
K Equilibrium Constant Calculate K from concentrations.
A=εbc Beer-Lambert Law Calculate concentration from absorbance.
E° Electrochemistry Calculate standard cell potential.
k=Ae... Arrhenius Equation Calculate rate constants vs temperature.
∑ All Biology → 70+ Calculators Browse 70+ biology calculators — genetics, ecology, physiology, biochemistry, microbiology.
BMR BMR Calculator Calculate basal metabolic rate.
BCS Body Condition Score Assess body condition for health evaluation.
COR Coral Calcification Calculate coral calcification and growth rates.
CrCl Creatinine Clearance Estimate creatinine clearance and kidney function.
DD Degree Day Calculator Calculate growing degree days for agriculture.
DO Dissolved Oxygen Saturation Calculate oxygen saturation in water.
t½ Drug Half-Life Calculate drug elimination half-life.
ELISA ELISA Titer Calculator Calculate ELISA antibody titers.
FCR Feed Conversion Ratio Calculate feed conversion ratio for livestock.
CELL Hemocytometer Count Calculate cell concentration from hemocytometer counts.
HERD Herd Immunity Calculate herd immunity threshold.
EPI Incidence & Prevalence Calculate disease incidence and prevalence rates.
J Pielou Evenness Calculate species evenness index.
DUE Pregnancy Due Date Calculate due date and trimester milestones.
Ct qPCR ΔΔCt Calculate relative gene expression from qPCR data.
RR Relative Risk Calculate relative risk and odds ratio.
REN Restriction Digest Calculate restriction enzyme digest products.
PSU Salinity Converter Convert conductivity to practical salinity units.
SEED Seeding Density Calculate cell seeding density for culture.
SS Sensitivity & Specificity Calculate diagnostic sensitivity and specificity.
PFU Viral Titer Calculate viral titer from plaque assays.
WQI Water Quality Index Calculate water quality index from parameters.
p² Hardy-Weinberg Calculate allele and genotype frequencies.
D Diversity Index (Simpson) Calculate species diversity index.
CO Cardiac Output Calculate cardiac output from HR and SV.
Vmax Michaelis-Menten Calculate enzyme kinetic parameters.
🧫 CFU/mL Calculator Calculate colony-forming units per mL.
J Energy Converter Convert joules, BTU, calories, and kWh.
GR Gear Ratio Calc Calculate gear ratio, RPM, and torque.
BD Beam Deflection Estimate deflection, stress, and moment.
REC Waste & Recycling Estimate household waste and recycling impact.
ATOM Atom Calculator Calculate protons, neutrons, and electrons.
AMU Atomic Mass Calculator Estimate atomic mass from protons and neutrons.
AVG Average Atomic Mass Calculator Calculate weighted average isotope mass.
BO Bond Order Calculator Calculate molecular orbital bond order.
ION Chemical Name Calculator Estimate ionic formula subscripts from charges.
Zeff Effective Nuclear Charge Calculator Calculate effective nuclear charge.
EC Electron Configuration Calculator Estimate shell electron counts.
EN Electronegativity Calculator Calculate electronegativity difference.
MM Molar Mass Calculator Calculate molar mass from atom counts.
% Percent Composition Calculator Calculate mass percent composition.
IC Percent Ionic Character Calculator Estimate ionic character from electronegativity.
pKa pKa Calculator Convert between Ka and pKa.
QUIZ Quiz: Electron Configuration Calculator Check electron totals across shells.
AFR AFR Calculator (Air-Fuel Ratio) Calculate air-fuel ratio from fuel composition.
AE Atom Economy Calculator Calculate atom economy for a reaction.
NA Avogadro's Number Calculator Convert moles to particles.
EF Empirical Formula Calculator Find empirical ratios from mass percentages.
g->n Grams to Moles Calculator Convert grams to moles using molar mass.
H+ Hydrogen Ion Concentration Calculator Calculate hydrogen ion concentration from pH.
m Molality Calculator Calculate molality from moles and solvent mass.
M Molarity Calculator Calculate molarity from moles and volume.
GAS Molar Mass of Gas Calculator Calculate gas molar mass from PV=nRT.
mol Mole Calculator Convert moles to mass and particles.
MW Molecular Weight Calculator Estimate molecular weight from atom counts.
X Mole Fraction Calculator Calculate mole fractions in a mixture.
atoms Moles to Atoms Converter Convert moles to formula units and atoms.
N Normality Calculator Calculate normality from molarity and equivalents.
ppm PPM to Molarity Calculator Convert ppm to molarity.
gamma Activity Coefficient Calculator Estimate activity coefficient.
ALL Alligation Calculator Calculate mixing ratio for target strength.
BLCH Bleach Dilution Calculator Calculate bleach and water volumes.
BUF Buffer Capacity Calculator Estimate buffer capacity.
pH Buffer pH Calculator Calculate buffer pH.
CONC Concentration Calculator Convert percent, molarity, and ppm.
DF Dilution Factor Calculator Calculate dilution factor.
mass% Mass Percent Calculator Calculate mass percent composition.
MIX Mixing Ratio Calculator Calculate concentration after mixing solutions.
NEUT Neutralization Calculator Calculate neutralization volume.
%sol Percent Solution Calculator Calculate percent w/v solution.
pH pH Calculator Calculate pH, pOH, and ion concentration.
Raoult Raoult's Law Calculator Calculate solution vapor pressure.
RECON Reconstitution Calculator Calculate volume for reconstitution.
SAP Saponification Value Calculator Calculate saponification value.
SER Serial Dilution Calculator Calculate final concentration after serial dilutions.
DIL Solution Dilution Calculator Calculate final molarity after dilution.
TDS TDS Calculator Calculate total dissolved solids from conductivity.
TITR Titration Calculator Calculate titration volume.
HARD Water Hardness Calculator Calculate hardness as CaCO3 equivalent.
Ea Activation Energy Calculator Calculate activation energy from rate constants.
AY Actual Yield Calculator Calculate actual yield from percent yield.
ARR Arrhenius Equation Calculator Calculate rate constant from Arrhenius equation.
BAL Chemical Equation Balancer Balance hydrocarbon combustion.
K Equilibrium Constant Calculator Calculate equilibrium constant.
Kp Kp Calculator Convert Kc to Kp.
RATIO Molar Ratio Calculator Compare stoichiometric mole ratios.
ION Net Ionic Equation Calculator Estimate net reacting equivalents.
PY Percent Yield Calculator Calculate percent yield.
k Rate Constant Calculator Calculate rate constant from rate law data.
Q Reaction Quotient Calculator Calculate reaction quotient.
TY Theoretical Yield Calculator Calculate theoretical yield.
BP Boiling Point Calculator Estimate boiling point from pressure.
ALT Boiling Point at Altitude Calculator Estimate boiling point at altitude.
BPE Boiling Point Elevation Calculator Calculate boiling point elevation.
dS Entropy Calculator Calculate entropy change.
FPD Freezing Point Depression Calculator Calculate freezing point depression.
dG Gibbs Free Energy Calculator Calculate Gibbs free energy.
F Gibbs' Phase Rule Calculator Calculate thermodynamic degrees of freedom.
HC Heat of Combustion Calculator Calculate heat released by combustion.
Q10 Q10 Calculator Calculate temperature coefficient.
STP STP Calculator (Standard Temperature and Pressure) Calculate gas volume at STP.
VP Vapor Pressure Calculator Estimate vapor pressure.
H2O Vapor Pressure of Water Calculator Estimate water vapor pressure.
EMF Cell EMF Calculator - Electromotive Force of a Cell Calculate standard cell potential.
ELEC Electrolysis Calculator Calculate deposited mass from electrolysis.
I Ionic Strength Calculator Calculate ionic strength.
LE Lattice Energy Calculator Estimate lattice energy.
NERN Nernst Equation Calculator Calculate nonstandard cell potential.
D Diffusion Coefficient Calculator Calculate diffusion coefficient.
EFF Rate of Effusion Calculator Compare gas effusion rates.
HL Half-Life Calculator Calculate first-order half-life.
LANG Langmuir Isotherm Calculator Calculate Langmuir adsorption coverage.
OSM Osmotic Pressure Calculator Calculate osmotic pressure.
PP Partial Pressure Calculator Calculate gas partial pressure.
RAD Radioactive Decay Calculator Calculate isotope decay.
2PA Two-Photon Absorption Calculator Estimate two-photon absorption rate.
YL Young-Laplace Equation Calculator Calculate curved-interface pressure difference.
COD Chemical Oxygen Demand Calculator Calculate chemical oxygen demand.
CA Combustion Analysis Calculator Estimate C/H/O from combustion products.
COMB Combustion Reaction Calculator Balance complete combustion.
PRO Crude Protein Calculator Calculate crude protein from nitrogen.
DU Degree of Unsaturation Calculator Calculate degree of unsaturation.
ETH Liquid Ethylene Density Calculator Calculate liquid ethylene density.
C14 Radiocarbon Dating Calculator (Carbon 14 Dating) Estimate age from C-14 fraction.
CAL Calibration Curve Calculator Calculate concentration from a calibration curve.
ENZ Enzyme Activity Calculator Calculate enzyme activity.
PI Isoelectric Point Calculator Estimate isoelectric point.
MM Michaelis-Menten Equation Calculator Calculate enzyme reaction velocity.
SOL Protein Solubility Calculator Estimate soluble protein mass.
RES Resuspension Calculator Calculate resuspension volume.
A=ebc Beer-Lambert Law Calculator Calculate concentration from absorbance.
CELL Cubic Cell Calculator Calculate cubic unit cell volume and density.
DT Detention Time Calculator Calculate tank detention time.
HRT Hydraulic Retention Time Calculator Calculate hydraulic retention time.
hkl Miller Indices Calculator Convert crystal intercepts to Miller indices.
TA Annealing Temperature Calculator Estimate PCR annealing temperature from primer Tm values.
GT Generation Time Calculator Calculate microbial generation time from population growth.
C1V1 Cell Dilution Calculator Calculate stock and diluent volumes for cell dilution.
DT Cell Doubling Time Calculator Calculate cell doubling time from growth counts.
DNA DNA Concentration Calculator Estimate DNA concentration from A260 absorbance.
LIG Ligation Calculator Calculate insert DNA mass for ligation ratios.
LOG Log Reduction Calculator Calculate microbial log and percent reduction.
PRO Protein Concentration Calculator Estimate protein concentration from absorbance.
AF Allele Frequency Calculator Calculate allele frequencies from genotype counts.
2X Dihybrid Cross Calculator - Punnett Square Calculate two-trait phenotype probabilities.
COPY DNA Copy Number Calculator Convert DNA mass and length into copy number.
RNA DNA to mRNA Converter Convert DNA base counts into mRNA base counts.
PS Punnett Square Calculator Calculate monohybrid offspring genotype ratios.
qPCR qPCR Efficiency Calculator Calculate qPCR efficiency from a standard curve slope.
3X Trihybrid Cross Calculator - Punnett Square Calculate three-trait phenotype probabilities.
CAT Cat Pregnancy Calculator Estimate cat gestation progress and days remaining.
COW Cow Gestation Calculator Estimate cow gestation progress and days remaining.
DOG Dog Pregnancy Calculator Estimate dog gestation progress and days remaining.
GOAT Goat Gestation Calculator Estimate goat gestation progress and days remaining.
GP Guinea Pig Pregnancy Calculator Estimate guinea pig gestation progress.
HORSE Mare Gestation Calculator - Horse Gestation Estimate mare gestation progress and days remaining.
LLAMA Llama Calculator Estimate llama gestation progress and days remaining.
RAB Rabbit Gestation Calculator Estimate rabbit gestation progress and days remaining.
SHEEP Sheep Gestation Calculator Estimate sheep gestation progress and days remaining.
PIG Swine Gestation Calculator Estimate swine gestation progress and days remaining.
BND Benadryl Dosage Calculator for Dogs Estimate a weight-based dosage range.
CPX Cephalexin For Dogs Dosage Calculator Estimate a weight-based dosage range.
COST Cost of Owning a Dog Calculator Estimate annual and lifetime dog ownership costs.
AGE Dog Age Calculator Estimate dog age in human-year equivalent.
BMI Dog BMI Calculator Calculate a simple dog body mass index.
NUT Dog Nutrition Calculator Estimate daily dog calories from body weight.
CHOC Dog Chocolate Toxicity Calculator Estimate theobromine exposure by body weight.
CRATE Dog Crate Size Calculator Estimate crate length and height.
FOOD Dog Food Calculator Convert daily calories into food quantity.
HARN Dog Harness Size Calculator Estimate harness fit from chest and neck girth.
HEAT Dog Heat Cycle Calculator Estimate days until the next heat cycle.
LIFE Dog Life Expectancy Calculator Estimate remaining years from breed lifespan.
MET Metacam Dosage Calculator for Dogs Estimate a weight-based dosage range.
ON Dog Onion Toxicity Calculator Estimate onion exposure by body weight.
QOL Dog Quality of Life Calculator Score common quality-of-life factors.
RSN Dog Raisin Toxicity Calculator Estimate raisin or grape exposure by body weight.
SIZE Dog Size Calculator Estimate adult dog weight from growth progress.
H2O Dog Water Intake Calculator Estimate daily water needs.
O3 Omega-3 For Dogs Calculator Estimate daily EPA and DHA amount.
QUIZ Quiz: Dog Size Calculator Estimate adult dog size from growth clues.
RAW Raw Dog Food Calculator Estimate raw food quantity by body weight.
TRM Tramadol For Dogs Calculator Estimate a weight-based dosage range.
AGE Cat Age Calculator Estimate cat age in human-year equivalent.
BND Cat Benadryl Dosage Calculator Estimate a weight-based dosage range.
BMI Cat BMI Calculator Calculate a simple feline body mass index.
CAL Cat Calorie Calculator Estimate daily cat calories.
CHOC Cat Chocolate Toxicity Calculator Estimate theobromine exposure by body weight.
COST Catculator Estimate monthly cat care costs.
QOL Cat Quality of Life Calculator Score common feline quality-of-life factors.
CPX Cephalexin For Cats Dosage Calculator Estimate a weight-based dosage range.
OIL Fish Oil Dosage Calculator For Cats Estimate daily fish oil volume.
SIZE How Big Will My Cat Get Calculator Estimate adult cat weight from growth progress.
MET Metacam Dosage Calculator for Cats Estimate a weight-based dosage range.
QUIZ Quiz: Cat Age Calculator Estimate cat age equivalent from maturity factors.
BIRD Bird Age Calculator Estimate bird age equivalent.
TEMP Crickets Chirping Thermometer Estimate temperature from cricket chirps.
DM Dry Matter Calculator Convert nutrients to dry matter basis.
GP Guinea Pig Years to Human Years Calculator Estimate guinea pig age equivalent.
HAM Hamster Age Calculator Estimate hamster age equivalent.
HORSE Horse Weight Calculator Estimate horse weight from body measurements.
RAB Rabbit Cage Size Calculator Estimate minimum rabbit cage area.
COLOR Rabbit Color Calculator Estimate recessive color probability.
RAT Rat Cage Calculator Estimate cage volume and rat capacity.
TURT Turtle Tank Size Calculator Estimate aquatic turtle tank size.
MR Animal Mortality Rate Calculator Calculate herd or flock mortality rate.
AC Cattle per Acre Calculator Estimate grazing stocking capacity.
FCR Feed Conversion Ratio Calculator Calculate feed conversion ratio and efficiency.
BIN Grain Bin Calculator Estimate grain bin capacity.
FENCE Livestock Fence Cost Calculator Estimate fence cost from length and gates.
AC/H Acres Per Hour Calculator Calculate field work rate.
BULB Bulb Spacing Calculator Estimate bulbs needed from spacing.
CO2 CO2 Grow Room Calculator Estimate CO2 needed for a grow room.
COMP Compost Calculator Estimate compost volume.
CORN Corn Yield Calculator Estimate corn yield per acre.
DLI Daily Light Integral Calculator Calculate DLI from PPFD and photoperiod.
NPK Fertilizer Calculator Calculate fertilizer needed from nutrient target.
GDU GDU Calculator - Growing Degree Units Calculate growing degree units.
GRAIN Grain Conversion Calculator Convert grain bushels to weight.
SEED Grass Seed Calculator Estimate grass seed needed.
LAWN Lawn Mowing Cost Calculator Estimate mowing service cost.
MULCH Mulch Calculator Estimate mulch volume.
STRAW Pine Straw Calculator Estimate pine straw bales.
POP Plant Population Calculator Calculate plants per acre.
SPACE Plant Spacing Calculator Estimate plants needed from spacing.
POT Potting Soil Calculator Estimate potting soil volume.
SOD Sod Calculator Estimate sod rolls needed.
SOIL Soil Calculator Estimate soil volume.
VPD VPD Calculator (Vapor Pressure Deficit) Calculate vapor pressure deficit.
VEG Vegetable Seed Calculator Estimate seeds needed with germination adjustment.
YLD Vegetable Yield Calculator Estimate harvest weight.
WP Water Potential Calculator Calculate water potential.
WSF Water Soluble Fertilizer Calculator Calculate soluble fertilizer grams.
BA Basal Area Calculator Calculate tree basal area.
LEAF Tree Leaves Calculator Estimate total leaves from branch sampling.
AGE Tree Age Calculator Estimate tree age from diameter.
DBH Tree Diameter Calculator Convert circumference to diameter.
HT Tree Height Calculator Estimate height using angle and distance.
SPC Tree Spacing Calculator Calculate trees per acre from spacing.
VAL Tree Value Calculator Estimate timber value.
MLVSS MLVSS Calculator Calculate mixed liquor volatile suspended solids.
PET Pet Sitter Rates Calculator Estimate pet sitting fees.
PMW Protein Molecular Weight Calculator Estimate protein molecular weight from amino acids.
WW Wastewater Calculator Calculate wastewater loading and removal.