Mila's Energy Converter PRO
Joules, calories, BTU, and kWh — 13 energy units.
What’s New
Version 2.7.9 · 2026-05-03
• Now available in 10 languages: Danish, German, French, Italian, Japanese, Korean, Brazilian Portuguese, Russian, Vietnamese, and Chinese (Simplified)
• Improved spacing and layout in Classic and Compact view styles
About Mila's Energy Converter PRO
Food labels use kilocalories, your physics homework uses joules, and your electric bill lists kilowatt-hours — same concept, different units. Mila's Energy Converter PRO converts between 13 energy units across nutrition, electrical, thermal, mechanical, and scientific scales. Results update as you type. From the developer of Unit Converter: Mila's Tools (Apple Staff Pick, 4.8★ from 1,300+ reviews).
Every major energy standard
- Metric/SI — joules, kilojoules, megajoules, gigajoules
- Thermal — calories, kilocalories, BTU, therms
- Electrical — watt-hours and kilowatt-hours
- Mechanical — foot-pounds
- Scientific — electronvolts and ergs
Where energy units collide
Nutritionists track food in calories. Electricians and utility companies work in kWh. Physicists and engineers default to joules. Gas billing may use therms. Converting between these requires knowing precise conversion factors — this app handles the math so you can compare apples-to-apples across domains.
Precision and personalization
- Automatic smart formatting or manual decimal precision (0–10 places)
- Locale-aware number separators
- Favorite units pinned to the top — drag to reorder
- Show or hide units you do not need
- Quick-copy any value with a swipe
- Dark mode, comfortable or compact layouts
- Available on iPhone, iPad, and Mac
Frequently asked questions
- How do I convert food calories to joules?
- Enter a value in calories or kilocalories and read the joule equivalent instantly. The app applies standard conversion factors automatically.
- Can I convert kilowatt-hours to BTU?
- Yes. All 13 supported units convert to each other in real time — useful for comparing appliance energy use, HVAC specs, or utility billing.
- Does the app work offline?
- Yes. All conversions run on your device with no network connection required.
- Is this related to the energy converter in Mila's Tools?
- Mila's Energy Converter PRO is a focused standalone app from the Mila's Tools family, sharing the same accuracy and interface design as Unit Converter: Mila's Tools.
Privacy
Mila's Energy Converter does not collect conversion data or require an account. Your inputs stay on your device.