Free online calculators and tools
Choose a calculator below and run it in your browser. Each tool shows the result and the calculation behind it, so you can check the formula, units, and intermediate steps instead of copying a number from a black box.
Statistics
Turn test statistics into probabilities and check common significance thresholds.
Linear algebra
Work through small matrix calculations without losing the intermediate steps.
Chemistry
Prepare solutions, balance reactions, and convert chemical formulas to molar mass.
Dilution Calculator
Solve for a concentration or volume in C1V1 = C2V2 and convert common units.
Open calculatorChemical Equation Balancer
Find the smallest whole-number coefficients and check atom conservation.
Open calculatorMolar Mass Calculator
Calculate grams per mole and inspect each element's contribution.
Open calculator