Science & Engineering Calculators
Access free, interactive calculators for science & engineering. Click any tool to open the workspace on WebCalcSys.com.
All Chemistry → 100+ Calculators
Browse 100+ chemistry calculators — stoichiometry, thermodynamics, kinetics, equilibrium, acid-base, electrochemistry.
pH Calculator
Calculate pH, pOH, and ion concentration.
Molarity Calculator
Calculate molarity, moles, mass, and volume.
Henderson-Hasselbalch
Calculate pH of buffer solutions.
Dilution (M₁V₁=M₂V₂)
Calculate dilution concentrations and volumes.
Equilibrium Constant
Calculate K from concentrations.
Beer-Lambert Law
Calculate concentration from absorbance.
Electrochemistry
Calculate standard cell potential.
Arrhenius Equation
Calculate rate constants vs temperature.
All Biology → 70+ Calculators
Browse 70+ biology calculators — genetics, ecology, physiology, biochemistry, microbiology.
BMR Calculator
Calculate basal metabolic rate.
Body Condition Score
Assess body condition for health evaluation.
Coral Calcification
Calculate coral calcification and growth rates.
Creatinine Clearance
Estimate creatinine clearance and kidney function.
Degree Day Calculator
Calculate growing degree days for agriculture.
Dissolved Oxygen Saturation
Calculate oxygen saturation in water.
Drug Half-Life
Calculate drug elimination half-life.
ELISA Titer Calculator
Calculate ELISA antibody titers.
Feed Conversion Ratio
Calculate feed conversion ratio for livestock.
Hemocytometer Count
Calculate cell concentration from hemocytometer counts.
Herd Immunity
Calculate herd immunity threshold.
Incidence & Prevalence
Calculate disease incidence and prevalence rates.
Pielou Evenness
Calculate species evenness index.
Pregnancy Due Date
Calculate due date and trimester milestones.
qPCR ΔΔCt
Calculate relative gene expression from qPCR data.
Relative Risk
Calculate relative risk and odds ratio.
Restriction Digest
Calculate restriction enzyme digest products.
Salinity Converter
Convert conductivity to practical salinity units.
Seeding Density
Calculate cell seeding density for culture.
Sensitivity & Specificity
Calculate diagnostic sensitivity and specificity.
Viral Titer
Calculate viral titer from plaque assays.
Water Quality Index
Calculate water quality index from parameters.
Hardy-Weinberg
Calculate allele and genotype frequencies.
Diversity Index (Simpson)
Calculate species diversity index.
Cardiac Output
Calculate cardiac output from HR and SV.
Michaelis-Menten
Calculate enzyme kinetic parameters.
CFU/mL Calculator
Calculate colony-forming units per mL.
Energy Converter
Convert joules, BTU, calories, and kWh.
Gear Ratio Calc
Calculate gear ratio, RPM, and torque.
Beam Deflection
Estimate deflection, stress, and moment.
Waste & Recycling
Estimate household waste and recycling impact.
Browse Other Calculator Categories
Explore calculation sheets and guides in other mathematical and scientific fields.