Calculator
Amp Hour Calculator
Size battery banks, convert amp hours to watt hours, and estimate runtime with efficiency adjustments and safety margins.
- Runtime estimator
- Capacity planning
- Ah ↔ Wh converter
Everything you need to translate capacity numbers, energy units, and runtime math into plain language. Each calculator mirrors real-world field work so you can move from estimate to action quickly.
Tools library
Every listing links to a full-featured page with walkthroughs, formulas, and conversion examples, so you can double-check your work with confidence.
Size battery banks, convert amp hours to watt hours, and estimate runtime with efficiency adjustments and safety margins.
Turn power and time into total energy instantly, complete with reverse conversions and real-world device examples.
Convert milliamp-hours to amp-hours (and back) for any battery pack, plus reference tables and FAQ guidance.
Tell us the equations or sizing workflow you’re trying to solve. We’ll prioritize new BearBattery tools based on community demand.