Energy Unit Converter
Convert between kWh, MJ, BTU, kcal, therms, and ton-hours
Frequently Asked Questions
Energy gets measured in genuinely different units depending on context — electricity bills in Pakistan use kWh (called "units"), international engineering contexts often use MJ or BTU, nutrition labels use kcal, and gas billing in some markets uses therms — and converting cleanly between them means using the correct fixed conversion factor for each unit pair, not an approximation.
Why "unit" on your bill just means kWh
Pakistani DISCOs (electricity distribution companies) use the word "unit" as shorthand for one kilowatt-hour (kWh) — when a bill shows "350 units consumed," that's 350 kWh, not some DISCO-specific measure that needs separate conversion. Beyond kWh, this converter handles MJ (megajoules, the SI energy unit used in many engineering and international contexts), BTU (British Thermal Units, common in HVAC and appliance ratings, especially imported equipment), kcal (kilocalories, familiar from nutrition labels but also a legitimate energy unit), therms (used in some gas billing systems), and ton-hours (a cooling-capacity-derived energy unit used in HVAC contexts). Natural gas volume (cubic metres) is deliberately not included, since converting gas volume to an energy value requires a calorific value that varies by gas field and source — approximating that conversion risked giving a confidently wrong number rather than an honestly incomplete converter.
A worked example
A single kWh converts to a specific, fixed number of MJ, BTU, and kcal — these are physical constants, not approximations that vary by context, so the same 1 kWh input always produces the same converted values regardless of which country's grid or which appliance the energy came from, unlike unit-price conversions which do vary by tariff or market.
How this connects to your other utility calculations
If you're trying to compare an imported appliance's BTU-rated cooling or heating capacity against a Pakistani electricity bill's kWh-based cost, this converter is the bridge between the two unit systems — pair it with the Appliance Electricity Calculator to translate a converted energy figure into an actual monthly cost estimate.
Common mistakes
The most common mistake is treating "unit" as a DISCO-specific or ambiguous measure that needs looking up, when it's simply kWh by convention across the Pakistani electricity industry — no conversion is needed between your bill's "units" figure and kWh, since they're the same number by definition.