Type your numbers, get the answer and the steps. No signup, no clutter, built for lab reports and problem sets.
Formulas, solutions, and lab math
Formula to g/mol with percent composition and grams to moles.
Open toolSolve for M, moles, volume, or use M1V1 = M2V2.
Open toolActual vs theoretical yield, with a limiting reactant helper.
Open toolInteractive table with mass, group, and element types.
Open toolBalanced, full ionic and net ionic equations (BIE, FIE, NIE).
Open toolGrams to moles to grams, limiting reactant and yield.
Open toolRedox, precipitation, acid-base, displacement and more.
Open toolDot structures for atoms, ions, molecules and ionic compounds.
Open toolCount and round sig figs, including scientific notation.
Open toolTap an element for details, or pick a type to highlight it. Swipe sideways on a phone to see the whole table.
Genetics, sequences, and lab dilutions
One- and two-gene crosses with genotype and phenotype ratios.
Open toolAllele and genotype frequencies from one known value.
Open toolTranscribe and translate a DNA or mRNA sequence.
Open toolConcentration, transfer, and diluent volume for each tube.
Open tool3D study tools for A&P
Algebra, statistics, and counting
Roots, discriminant, and vertex, with steps.
Open toolDeterminant, inverse, transpose, and products up to 4 by 4.
Open toolBest-fit line, r, R², and a scatter plot.
Open toolFor a mean, from summary stats or raw data.
Open toolSpread of a data set, and z-scores with percentiles.
Open toolnPr, nCr, factorials, and repetition.
Open toolPercent of, change, increase, and decrease.
Open toolGrades, stats, and study tools
APA 7, MLA 9 and Chicago citations, in-text citations and works cited.
Open toolSemester GPA and new cumulative GPA on a 4.0 scale.
Open toolThe score you need on the final to reach your goal.
Open toolCourse grade from categories, and what you need on the rest.
Open toolLength, mass, volume, temperature, and more.
Open toolMonthly payment, total interest, and extra payments.
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Each calculator shows the formula and the numbers plugged in, so you can check your work and learn the method.
Tools follow the conventions used in intro chemistry and biology classes, from standard atomic weights to M1V1 = M2V2.
No account needed. Pages load fast and work on a phone at the lab bench.