Interactive Index of Refraction Calculator How to Use This Calculator This calculator determines various optical properties based on the index of refraction and Snell's Law. Select which variable you want

E=mc² Calculator (Mass-Energy Equivalence) Calculator Instructions Theory & Formulas Mass (m): kg (kilograms) g (grams) mg (milligrams) µg (micrograms) amu (atomic mass units) lb (pounds) oz (ounces) Calculate Energy How

Force Calculator F = m × a Solve for Force (F) Solve for Mass (m) Solve for Acceleration (a) Force (F) Newtons (N) Pound-force (lbf) Mass (m) kilogram (kg) gram

Pressure Calculator P = F / A Solve for Pressure (P) Solve for Force (F) Solve for Area (A) Pressure (P) Pascals (Pa) Kilopascals (kPa) Atmospheres (atm) Bar PSI Force