Science Tools
Density Calculator
Calculate density, mass, or volume using the formula ρ = m/V. Choose from multiple units for each variable. Includes a reference table of common material densities. Free, instant, browser-based.
Force Calculator (F = ma)
Calculate force, mass, or acceleration using Newton's second law F = ma. Supports N, kN, lbf, dyne, kg, lb, m/s², ft/s², and g-force. Free physics calculator.
Half-Life Calculator
Calculate radioactive decay using the half-life formula. Solve for remaining quantity, elapsed time, half-life, or initial quantity. Supports seconds, minutes, hours, days, and years. Free, browser-based.
Ideal Gas Law Calculator
Solve the ideal gas law (PV = nRT) for any variable. Supports multiple units for pressure (atm, kPa, mmHg, bar, psi), volume (L, mL, m³), and temperature (K, °C, °F). Free, browser-based, instant results.
Interactive Periodic Table
Explore all 118 elements with an interactive, color-coded periodic table. Click any element for its atomic mass, category, and more. Free, no signup.
Kinetic Energy Calculator
Calculate kinetic energy (KE), mass, or velocity using KE = ½mv². Supports joules, kilojoules, calories, eV for energy; kg, g, lb for mass; m/s, km/h, mph, ft/s for velocity. Free, browser-based physics tool.
Molar Mass Calculator
Calculate the molar mass of any chemical compound by entering its formula. Handles parentheses, brackets, and all 118 elements. Shows a full element-by-element breakdown. Free, instant, browser-based.
Molarity Calculator
Calculate molarity (M), moles of solute, or volume of solution. Also includes a dilution calculator using M1V1 = M2V2. Free browser-based chemistry tool.
pH Calculator
Convert pH to hydrogen ion concentration [H⁺], hydroxide concentration [OH⁻], and pOH instantly. Or enter a concentration to get the pH. Includes an acid/base classification scale. Free, browser-based, no sign-up required.
Speed and Velocity Calculator
Calculate speed, distance, or time using speed = distance / time. Supports m/s, km/h, mph, ft/s, and knots. Free physics calculator, no signup.
Stoichiometry Calculator
Calculate moles and grams of a product or reactant using stoichiometry. Enter the coefficients from a balanced chemical equation, the molar masses, and the known amount to find the unknown. Free, browser-based chemistry tool.
Wave Frequency Calculator
Calculate wave speed, frequency, or wavelength using v = fλ. Also finds period (T = 1/f). Supports m/s, km/s, Hz, kHz, MHz, m, nm, and more. Free browser-based physics tool.
About These Science Tools
This collection of 12+ 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.