Energy Calculator

Energy, Work & Calorimetry Calculator

Compute mechanical kinetic and potential energy, model specific heat thermal dynamics, and convert universal energy equivalents

Object Mass (m)

Velocity (v)

Elevation / Height (h in meters) Datum height above ground

Spring Constant (k in N/m) Elastic stiffness coefficient

Spring Displacement (x in m) Compression or extension

Total Mechanical Energy (E_k + E_p + E_s)

27.24 kJ

Kinetic: 15.73 kJ • Gravitational: 11.47 kJ • Elastic: 36.0 J

Kinetic Energy (E_k = ½mv²) 15,730.0 J 15.73 kJ dynamic energy

Gravitational Potential (E_p = mgh) 11,473.8 J At g = 9.807 m/s²

Elastic Spring Potential (E_s = ½kx²) 36.00 J Stored compressive work

Freefall Impact Velocity (from h) 18.79 m/s 67.6 km/h (42.0 mph)

Substance / Material Preset

Substance Mass

Initial Temp (T₁ in °C)

Final Temp (T₂ in °C)

Heating Power (Watts) e.g., 2,400W electric kettle

Thermal Efficiency (%) Heat loss margin

Electricity Rate ($ / kWh)

Total Thermal Energy Required (Q = mcΔT)

1,673.6 kJ

0.465 kWh • 399.8 kcal (ΔT = +80.0°C)

Heating Duration (at 90% η) 12m 55s 774.8 seconds elapsed

Direct Electrical Cost $0.083 0.517 kWh drawn from wall

British Thermal Units (BTU) 1,586.3 BTU HVAC cooling/heating equivalent

Thermal Capacity (C = m · c) 20,920 J / °C Heat required per degree rise

Quantity of Energy

Source Measurement Unit

Standard SI Metric Base

3,600,000 J (3.60 MJ)

1.0000 kWh • 859.85 kcal • 3,412.14 BTU

Food Calories (Nutritional kcal) 859.8 kcal ~3.4 chocolate candy bars

10W LED Continuous Illumination 100.0 Hours ~4.17 days uninterrupted runtime

Water Boiled from Room Temp 10.75 Liters Heated from 20°C to 100°C

TNT Explosive Equivalent 0.860 kg TNT Chemical explosive blast energy

Mechanical Foot-Pounds (Work) 2.655 × 10⁶ ft·lb 1.341 Horsepower-hours

Equivalent Crude Fuel Volume 0.030 US Gallons Automotive petrol equivalent