Energy & Power Converters

The Energy & Power category covers the mechanical, thermodynamic, and electrical quantities most frequently encountered in engineering, automotive, and scientific contexts: energy, power, pressure, force, and torque.

Energy: from kitchens to power plants

Energy is measured differently depending on the domain. Electricity bills use kilowatt-hours (kWh). Food nutrition uses kilocalories (kcal). Mechanical engineering uses joules and kilojoules. HVAC systems use British Thermal Units (BTU). Particle physics uses electron volts (eV). All of these measure the same physical quantity — the capacity to do work — but in units calibrated for very different scales.

The Energy Converter bridges all these domains: convert a meal's 500 kcal content to kJ for a European nutrition database, or express a power plant's daily output in BTU for an American engineering specification.

Power: watts, kilowatts, and horsepower

Power — energy per unit time — is measured in watts in the SI system, kilowatts for motors and appliances, and megawatts for power stations. Vehicle engines are quoted in horsepower (bhp in India, PS in European markets, hp in the US).

The Power Converter is particularly useful for automotive comparisons: converting between bhp (mechanical), PS (metric), and kW, all of which appear in Indian car specifications depending on the brand's origin.

Pressure: psi vs bar vs kPa

Pressure appears in multiple everyday contexts — tyre inflation (psi or bar), blood pressure (mmHg), weather forecasts (hPa or mbar), industrial pneumatics (bar or kPa). India's vehicle manufacturers typically specify tyre pressure in psi in owner's manuals while many European brands use bar. Hospital blood pressure readings are universal in mmHg.

The Pressure Converter converts between all eleven pressure units including the Torr (= mmHg), inHg (used in aviation altimeters), and technical atmosphere (at, distinct from standard atmosphere atm).

Force and torque: mechanical engineering

The Force Converter and Torque Converter are primarily used in engineering and automotive contexts. Engine torque specifications in India use N·m; American specs use lb-ft; older documentation uses kgf·m. The converters provide precise bidirectional conversion for all combinations.