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biology
kDa Calculator โ Convert Daltons to Kilodaltons & Estimate Protein Size
Convert between Da, kDa and MDa instantly, estimate protein molecular weight from amino acid count or gene length, and predict SDS-PAGE band position with a visual gel diagram
Use Calculator โchemistry
Reaction Rate Calculator โ Rate Law, Integrated Rate Laws
compute rate=k[A]^m[B]^n, determine reaction order and rate constant by method of initial rates, solve integrated rate laws for zero/first/second order, and identify reaction order.
Use Calculator โchemistry
Osmotic Pressure Calculator โ ฯ=iMRT, Van’t Hoff Equation & Colligative Properties
compute ฯ=iMRT for any solution, find molar mass of proteins by osmometry, determine van't Hoff factor, and compare all four colligative properties.
Use Calculator โchemistry
Boiling Point Elevation Calculator โ ฮTb=Kbmi & Freezing Point Depression
compute ฮTb=Kbรmรi and ฮTf=Kfรmรi for any solvent, find molar mass by cryoscopy, calculate van't Hoff factor. Includes Kb/Kf tables for 10 solvents and van't Hoff factor presets for common solutes
Use Calculator โchemistry
Activation Energy Calculator โ Arrhenius Equation, Ea & Rate Constant
solve k=Ae^(โEa/RT) for any variable, find Ea using the two-point Arrhenius method, perform linear regression on Arrhenius plot (ln k vs 1/T), and visualize the potential energy diagram.
Use Calculator โchemistry
Half Life Calculator โ Radioactive Decay, Carbon Dating & Decay Constant
solve N=Nโ(ยฝ)^(t/tยฝ) for any variable, calculate carbon-14 dating age, find decay constant ฮป, and reference half-lives for 25+ isotopes. Includes types of radioactive decay with nuclear equations.
Use Calculator โchemistry
Reaction Rate Calculator โ Rate Law, Integrated Rate Laws
compute rate=k[A]^m[B]^n, determine reaction order and rate constant by method of initial rates, solve integrated rate laws for zero/first/second order, and identify reaction order.
Use Calculator โchemistry
Osmotic Pressure Calculator โ ฯ=iMRT, Van’t Hoff Equation & Colligative Properties
compute ฯ=iMRT for any solution, find molar mass of proteins by osmometry, determine van't Hoff factor, and compare all four colligative properties.
Use Calculator โchemistry
Boiling Point Elevation Calculator โ ฮTb=Kbmi & Freezing Point Depression
compute ฮTb=Kbรmรi and ฮTf=Kfรmรi for any solvent, find molar mass by cryoscopy, calculate van't Hoff factor. Includes Kb/Kf tables for 10 solvents and van't Hoff factor presets for common solutes
Use Calculator โchemistry
Activation Energy Calculator โ Arrhenius Equation, Ea & Rate Constant
solve k=Ae^(โEa/RT) for any variable, find Ea using the two-point Arrhenius method, perform linear regression on Arrhenius plot (ln k vs 1/T), and visualize the potential energy diagram.
Use Calculator โchemistry
Half Life Calculator โ Radioactive Decay, Carbon Dating & Decay Constant
solve N=Nโ(ยฝ)^(t/tยฝ) for any variable, calculate carbon-14 dating age, find decay constant ฮป, and reference half-lives for 25+ isotopes. Includes types of radioactive decay with nuclear equations.
Use Calculator โchemistry
Equilibrium Constant Calculator โ Kc, Kp, ICE Tables & Q vs K
write Kc/Kp expressions, solve ICE table problems, convert Kp to Kc using Kp=Kc(RT)^ฮn, and compare Q to K to predict reaction direction. with color-coded ICE tables.
Use Calculator โPhysics
Ideal Gas Law Calculator โ PV=nRT, Combined Gas Law
use the combined gas law (Boyle's, Charles's, Gay-Lussac's), find molar mass of unknown gases, and compare ideal vs real gas with Van der Waals equation.
Use Calculator โPhysics
Pressure Calculator โ P=F/A, Hydrostatic, Absolute vs Gauge
compute P=F/A (force per area), hydrostatic pressure P=ฯgh at any fluid depth, convert between absolute and gauge pressure, find pressure altitude with ISA formula, and convert all pressure units (Pa, psi, bar, atm, mmHg)
Use Calculator โPhysics
Free Fall Calculator โ Distance, Time, Velocity & Terminal Velocity
compute fall time, distance, and velocity using v=gt, d=ยฝgtยฒ, and vยฒ=2gd. Includes terminal velocity calculator, reference table for falls from 10ft to 30,000ft, and comparison with/without air resistance
Use Calculator โPhysics
Gravitational Force Calculator โ Newton’s Law, Planet Weight & G-Force
compute F=Gmโmโ/rยฒ between any two masses, find your weight on all planets (Mars, Moon, Jupiter), calculate surface gravity, g-force, and impact force.
Use Calculator โPhysics
Electric Field Calculator โ Coulomb’s Law, E Field & Point Charge
compute electric force (Coulomb's law F=kqโqโ/rยฒ), electric field from point charge (E=kq/rยฒ), field from voltage (E=V/d), and fields from wire, ring, and disk charge distributions.
Use Calculator โPhysics
Work Done Calculator โ W=Fdยทcosฮธ Physics Formula with Steps
compute work using W=Fรdรcosฮธ, solve for force, distance, or angle, apply the Work-Energy Theorem, and calculate power with force-displacement diagram.
Use Calculator โbiology
kDa Calculator โ Convert Daltons to Kilodaltons & Estimate Protein Size
Convert between Da, kDa and MDa instantly, estimate protein molecular weight from amino acid count or gene length, and predict SDS-PAGE band position with a visual gel diagram
Use Calculator โbiology
Biodiversity Index Calculator โ Shannon, Simpson & Species Richness
Calculates biodiversity indices from species abundance data including Shannon-Wiener diversity Simpson's diversity species richness Compares biodiversity between two communities.
Use Calculator โbiology
Isoelectric Point Calculator โ pI from Protein or Peptide Sequence
pI from any protein or peptide sequence, view the charge vs pH curve, compute net charge at any pH, and use the MCAT pI formula.
Use Calculator โbiology
Protein Molecular Weight Calculator โ From Sequence or Formula
Calculate protein molecular weight from amino acid sequence or formula. Includes amino acid MW table, extinction coefficient at 260nm, and nmol-to-ฮผg conversion.
Use Calculator โbiology
Chi-Square Calculator โ Goodness of Fit, Test of Independence & Critical Values
run goodness of fit tests and tests of independence with full (OโE)ยฒ/E working tables, p-values, critical values, and Cramรฉr's V effect size. Supports contingency tables up to 6ร6
Use Calculator โbiology
Hardy-Weinberg Calculator โ Allele & Genotype Frequency Solver
Solve p, q, pยฒ, 2pq, qยฒ from any known value recessive phenotype frequency, allele frequency, or observed counts Includes genotype frequency calculator, allele frequency calculator, and phenotype frequency calculator
Use Calculator โMathematics
Asymptote Calculator โ Vertical, Horizontal & Slant Asymptotes
find all vertical, horizontal, and slant (oblique) asymptotes of rational functions Shows degree comparison for HA, denominator zeros for VA, and polynomial long division for slant asymptotes
Use Calculator โMathematics
Simplify Radicals Calculator โ Simplify โ Expressions Step by Step
Reduce any radical to simplest radical form, add and subtract like radicals, multiply and rationalize, and solve radical equations.prime factorization and perfect square methods
Use Calculator โMathematics
Rational Expressions Calculator โ Simplify,Add,Subtract,Multiply
simplify, add, subtract, multiply, and divide rational expressions with full step-by-step LCD calculation, factoring, cross-cancellation, and excluded values shown
Use Calculator โMathematics
Extrema Calculator โ Local Max, Min & Absolute Extrema with Steps
Find local maxima, local minima, and absolute extrema of any function using first and second derivative tests. Shows critical points, sign chart, and concavity analysis.
Use Calculator โMathematics
Gaussian Elimination Calculator โ Row Reduction & Matrix Solver
Solve systems of linear equations using Gaussian elimination with partial pivoting. Shows every row operation step, reduced row echelon form, and solution verification.
Use Calculator โMathematics
Absolute Value Calculator โ Equations, Inequalities & Graph
Calculate absolute value of numbers and expressions. Solves absolute value equations |ax+b|=c and inequalities |x|<k with number line diagrams
Use Calculator โWhy Students Choose Us
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