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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.

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pH

pH Calculator

Calculate pH, pOH, and ion concentration.

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M

Molarity Calculator

Calculate molarity, moles, mass, and volume.

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pH=

Henderson-Hasselbalch

Calculate pH of buffer solutions.

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M1V1

Dilution (M₁V₁=M₂V₂)

Calculate dilution concentrations and volumes.

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K

Equilibrium Constant

Calculate K from concentrations.

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A=εbc

Beer-Lambert Law

Calculate concentration from absorbance.

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Electrochemistry

Calculate standard cell potential.

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k=Ae...

Arrhenius Equation

Calculate rate constants vs temperature.

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All Biology → 70+ Calculators

Browse 70+ biology calculators — genetics, ecology, physiology, biochemistry, microbiology.

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BMR

BMR Calculator

Calculate basal metabolic rate.

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BCS

Body Condition Score

Assess body condition for health evaluation.

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COR

Coral Calcification

Calculate coral calcification and growth rates.

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CrCl

Creatinine Clearance

Estimate creatinine clearance and kidney function.

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DD

Degree Day Calculator

Calculate growing degree days for agriculture.

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DO

Dissolved Oxygen Saturation

Calculate oxygen saturation in water.

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Drug Half-Life

Calculate drug elimination half-life.

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ELISA

ELISA Titer Calculator

Calculate ELISA antibody titers.

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FCR

Feed Conversion Ratio

Calculate feed conversion ratio for livestock.

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CELL

Hemocytometer Count

Calculate cell concentration from hemocytometer counts.

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HERD

Herd Immunity

Calculate herd immunity threshold.

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EPI

Incidence & Prevalence

Calculate disease incidence and prevalence rates.

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J

Pielou Evenness

Calculate species evenness index.

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DUE

Pregnancy Due Date

Calculate due date and trimester milestones.

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Ct

qPCR ΔΔCt

Calculate relative gene expression from qPCR data.

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RR

Relative Risk

Calculate relative risk and odds ratio.

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REN

Restriction Digest

Calculate restriction enzyme digest products.

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PSU

Salinity Converter

Convert conductivity to practical salinity units.

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SEED

Seeding Density

Calculate cell seeding density for culture.

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SS

Sensitivity & Specificity

Calculate diagnostic sensitivity and specificity.

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PFU

Viral Titer

Calculate viral titer from plaque assays.

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WQI

Water Quality Index

Calculate water quality index from parameters.

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Hardy-Weinberg

Calculate allele and genotype frequencies.

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D

Diversity Index (Simpson)

Calculate species diversity index.

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CO

Cardiac Output

Calculate cardiac output from HR and SV.

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Vmax

Michaelis-Menten

Calculate enzyme kinetic parameters.

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🧫

CFU/mL Calculator

Calculate colony-forming units per mL.

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J

Energy Converter

Convert joules, BTU, calories, and kWh.

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GR

Gear Ratio Calc

Calculate gear ratio, RPM, and torque.

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BD

Beam Deflection

Estimate deflection, stress, and moment.

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REC

Waste & Recycling

Estimate household waste and recycling impact.

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