Power Converter
Convert between 10 power units — milliwatt to gigawatt, metric and mechanical horsepower, BTU/h, ton of refrigeration, foot-pound per second. Engineering, HVAC, automotive, electrical.
What powers the Power Converter
10 units from milliwatt to gigawatt
Metric hp (735.5 W) AND mechanical/US hp (745.7 W) both supported
BTU/h for HVAC
Ton of refrigeration (= 12,000 BTU/h = 3.517 kW)
foot-pound per second for US mechanical
Why the Power Converter is different
Browser-native
The Power Converter runs entirely in your browser. Input is processed locally — never uploaded, never logged, never cached anywhere outside your device.
No artificial limits
No daily quotas, no character ceilings, no "upgrade for more" walls. Every feature is the complete feature — the same on the first use as the thousandth.
Production-grade quality
Built to the same engineering bar as paid SaaS tools — accurate algorithms, audited logic, responsive design and accessibility-tested interactions.
Common use contexts
- Comparing EU car spec (kW) to US (hp)
- HVAC sizing — converting AC tonnage to kW
- Electrical engineering — power consumption ratings
- Solar panels — watt ↔ kW for sizing
Private and secure
Zero upload
All processing happens in your browser. Input is never transmitted, logged or cached.
Works offline
Once the page loads, the tool runs without an internet connection. No network calls happen during use.
No tracking
No accounts, no cookies for tool state. Only aggregate analytics count visits at the page level.