Science Tools
About These Science Tools
This collection of free online science tools is built for students, teachers, and anyone who needs a fast, reliable answer to a chemistry or physics problem. Every tool runs entirely in your browser — nothing you enter is sent to a server, and no account is needed.
Whether you're working through general chemistry homework, preparing for an AP exam, or just need a quick calculation, these tools give you step-by-step results so you can understand the process, not just the answer.
Molar Mass Calculator
Enter any chemical formula — from simple molecules like H2O or NaCl to complex organic compounds like C6H12O6 or Al2(SO4)3 — and instantly get the molar mass in grams per mole. The calculator parses parentheses, brackets, and nested groups and shows a full element-by-element breakdown so you can verify each contribution. Useful for stoichiometry, solution preparation, and any calculation that involves converting between grams and moles.
Ideal Gas Law Calculator
Solve for any of the four variables in the ideal gas law (PV = nRT) when given the other three. Choose which quantity you need — pressure, volume, amount in moles, or temperature — and the calculator converts your inputs to consistent SI units, applies the equation, and converts the result back to your chosen output unit. Pressure supports atm, kPa, mmHg, bar, and psi. Volume supports L, mL, and m³. Temperature accepts Kelvin, Celsius, and Fahrenheit. Ideal for general chemistry and AP Physics coursework.