Free calculators for Chemistry, Physics, Biology & Math with step-by-step solutions. Trusted by 100,000+ students worldwide.
Suggested Calculators
Free ideal gas law calculator — solve PV=nRT for any variable, 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. Full step-by-step working.
Use Calculator →Free pressure calculator — compute P=F/A (force per area), hydrostatic pressure P=ρgh 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 →Free fall calculator — compute fall time, distance, and velocity using v=gt, d=½gt², and v²=2gd. Includes terminal velocity calculator, reference table for falls from 10ft to 30,000ft, and comparison with/without air resistance
Use Calculator →Free gravitational force calculator — compute F=Gm₁m₂/r² between any two masses, find your weight on all planets (Mars, Moon, Jupiter), calculate surface gravity, g-force, and impact force. Full step-by-step working
Use Calculator →Free electric field calculator — compute electric force (Coulomb's law F=kq₁q₂/r²), electric field from point charge (E=kq/r²), field from voltage (E=V/d), and fields from wire, ring, and disk charge distributions. Full step-by-step working
Use Calculator →Free work calculus calculator — compute work done by variable forces using W=∫F(x)dx. Covers spring work (Hooke's law), chain lifting, liquid pumping, and general variable force problems with full symbolic integration steps. Calculus 2 work problems solved
Use Calculator →Free stoichiometry calculator with steps. Solve mole ratio, limiting reagent, theoretical yield, percent yield, and gram-to-gram word problems for any balanced chemical equation
Use Calculator →Free atomic number calculator. Find protons, neutrons, and electrons for any element or isotope. Includes electron configuration, ion calculator, isotope tool, and mini periodic table with step-by-step working
Use Calculator →Free exact mass calculator. Calculate monoisotopic mass from chemical formula, generate MS adduct m/z values [M+H]+, [M+Na]+, view isotope patterns, and compute isotope abundance and average atomic mass with step-by-step working.
Use Calculator →Free buffer pH calculator using the Henderson-Hasselbalch equation. Solve for pH, pKa, or concentration ratio, generate buffer preparation protocols for phosphate, Tris, acetate, citrate & HEPES buffers, and calculate buffer capacity — with step-by-step working
Use Calculator →Free Michaelis-Menten calculator — solve for Km, Vmax, velocity, and substrate concentration, generate Lineweaver-Burk plots from data, calculate kcat and catalytic efficiency, and model enzyme inhibition. Full step-by-step working
Use Calculator →Free dilution factor calculator. Solve C1V1=C2V2 equations, calculate dilution ratios (1:10, 1:50), serial dilutions, and cell dilutions. Instant recipe box showing exactly how to prepare your solution
Use Calculator →Free ideal gas law calculator — solve PV=nRT for any variable, 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. Full step-by-step working.
Use Calculator →Free pressure calculator — compute P=F/A (force per area), hydrostatic pressure P=ρgh 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 →Free fall calculator — compute fall time, distance, and velocity using v=gt, d=½gt², and v²=2gd. Includes terminal velocity calculator, reference table for falls from 10ft to 30,000ft, and comparison with/without air resistance
Use Calculator →Free gravitational force calculator — compute F=Gm₁m₂/r² between any two masses, find your weight on all planets (Mars, Moon, Jupiter), calculate surface gravity, g-force, and impact force. Full step-by-step working
Use Calculator →Free electric field calculator — compute electric force (Coulomb's law F=kq₁q₂/r²), electric field from point charge (E=kq/r²), field from voltage (E=V/d), and fields from wire, ring, and disk charge distributions. Full step-by-step working
Use Calculator →Free work calculus calculator — compute work done by variable forces using W=∫F(x)dx. Covers spring work (Hooke's law), chain lifting, liquid pumping, and general variable force problems with full symbolic integration steps. Calculus 2 work problems solved
Use Calculator →Free biodiversity calculator — compute Shannon-Wiener diversity index (H'), Simpson's index (1−D), species richness (S), and Pielou's evenness (J) from species count data. Full step-by-step working shown
Use Calculator →Free kDa calculator. 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 →Free isoelectric point calculator. Calculate 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 with step-by-step working
Use Calculator →Free protein molecular weight calculator. Calculate exact protein MW from amino acid sequence in Da and kDa, monoisotopic mass, molar extinction coefficient ε₂₈₀, and amino acid composition with step-by-step working
Use Calculator →Free chi-square calculator — run goodness of fit tests and tests of independence with full (O−E)²/E working tables, p-values, critical values, and Cramér's V effect size. Supports contingency tables up to 6×6
Use Calculator →Free Hardy-Weinberg calculator. Solve p, q, p², 2pq, q² from any known value — recessive phenotype frequency, allele frequency, or observed counts — with complete step-by-step working. Includes genotype frequency calculator, allele frequency calculator, and phenotype frequency calculator
Use Calculator →Free asymptote calculator — find all vertical, horizontal, and slant (oblique) asymptotes of rational functions with step-by-step working. Shows degree comparison for HA, denominator zeros for VA, and polynomial long division for slant asymptotes
Use Calculator →Free rational exponents calculator — evaluate xᵐ/ⁿ step by step, convert between radical and exponential notation, and simplify expressions using laws of rational exponents. Covers fractional exponents, negative exponents, and radical conversion
Use Calculator →Free average value of a function calculator — compute f_avg=(1/(b−a))∫f(x)dx with step-by-step working, find c values from the Mean Value Theorem for Integrals, and see the geometric equal-area rectangle graph.
Use Calculator →Free multiply polynomials calculator — use FOIL for binomials or the distribution grid for any polynomials. Shows every cross product, like terms collection, and auto-detects special products (difference of squares, perfect square trinomials)
Use Calculator →Free synthetic division calculator — divide any polynomial by (x−c) with the full synthetic division tableau shown step by step. Includes Remainder Theorem verification, Factor Theorem check, and complete polynomial factoring
Use Calculator →Free simplify radicals calculator — reduce any radical to simplest radical form, add and subtract like radicals, multiply and rationalize, and solve radical equations. Full step-by-step working with prime factorization and perfect square methods
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12 fully worked combined gas law practice problems — Boyle’s law, Charles’s law, Gay-Lussac’s law, combined gas law, and ideal gas law. Includes what is an ideal gas, gas law formulas, and common mistakes. Step-by-step solutions shown
12 fully worked pressure problems — P=F/A basic pressure, hydrostatic P=ρgh at depth, absolute vs gauge pressure, Pascal’s principle, and real-world applications. Full step-by-step solutions with common mistake explanations
12 fully worked adding and subtracting rational expressions practice problems — same denominator, LCD method, quadratic denominators, three fractions, and sign distribution traps. Full step-by-step solutions
Free chemistry, physics, biology & math calculators with step-by-step solutions. Trusted by 100,000+ students. Solve any science problem instantly!
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