Mechanical Energy Calculator Published By: Calculator Academy Last Updated: April 2, 2024 Mechanical Energy Calculator Basic Springs Rotation Conservation Presets Enter any 3 fields to solve the 4th. E = 1/2 m v^2 + m g h Mass kg g lb Velocity m/s ft/s km/h mph Height m cm ft in Mechanical Energy J cal BTU kJ Gravity (g) m/s² Results will appear here. E = 1/2 m v^2 + m g h + 1/2 k x^2 Mass kg g lb Velocity m/s ft/s km/h mph Height m cm ft in Spring Constant (k) N/m lbf/ft Compression/Extension (x) m cm ft in Mechanical Energy J kJ cal BTU Gravity (g) m/s² Solve for Energy Velocity Compression/Extension Height Results will appear here. E = 1/2 m v^2 + m g h + 1/2 I ω^2 Mass kg g lb Velocity m/s ft/s km/h mph Height m cm ft in Moment of Inertia (I) kg·m² Angular Speed (ω) rad/s rpm Mechanical Energy J kJ cal BTU Gravity (g) m/s² Solve for Energy Angular Speed Velocity Height Results will appear here. E start + W nonconservative = E end. Fill known start/end values and choose a target. Start (i) Mass kg g lb Velocity (v i) m/s ft/s km/h mph Height (h i) m cm ft in Spring k (optional) N/m lbf/ft x i (optional) m cm ft in I (optional) kg·m² ω i (optional) rad/s rpm End (f) Velocity (v f) m/s ft/s km/h mph Height (h f) m cm ft in x f (optional) m cm ft in ω f (optional) rad/s rpm Non-conservative Work Kinetic Friction μ Path Length d m cm ft in Incline Angle θ deg Other Work (positive adds energy) J kJ cal BTU Gravity (g) Solve target Final velocity v_f Final height h_f Final spring x_f Results will appear here. Click a preset to auto-fill inputs on the active tab. Roller coaster drop: m=70 kg, h=30 m, v=0 Spring mass: m=2 kg, k=120 N/m, x=0.5 m Flywheel: I=0.5 m r^2 with m=5 kg, r=0.2 m, ω=20 rad/s Calculate Reset Summary results will appear here.