Ah to Wh converter

About This Tool

This tool converts energy capacity expressed as ampere-hours (Ah) into energy capacity expressed in watt-hours (Wh) for a fixed voltage. It is used by engineers, technicians, battery installers, and hobbyists who know a battery rating in Ah and the system voltage and need a comparable energy figure for sizing, planning, and comparison. The common scenario is a 12 V battery rated at 100 Ah; the user wants to know its nominal energy stored, in Wh, to size inverters or estimate runtime. The tool assumes the goal is Ah to Wh; it cannot derive instantaneous power without a current or a time basis. If voltage is missing or invalid, the tool reports an error immediate output.
\nThis tool applies the simple relation Wh = Ah × V to produce energy in watt-hours. Required inputs: Ah and voltage (V). Outputs: energy_wh (Wh) and energy_kwh (kWh) derived. Optional/advanced: support for automatic unit conversion of the same inputs, validation with bounds, and rounding to configurable decimals. Features include validation, error signaling, and derived results for documentation. The design emphasizes clarity for planning tasks and cross-battery comparisons.
\nInputs: Ah (number, units Ah, sample 100, required), voltage (number, units V, sample 12, required). Outputs: energy_wh (number, units Wh, default 2 decimals), energy_kwh (number, units kWh, energy_wh/1000). Validation rules: non-negative, numeric; handle overflow gracefully; if missing, report error.
\nAlgorithms: Core formula: energy_wh = Ah × voltage. Derived: energy_kwh = energy_wh / 1000. Rounding: default to 2 decimals; optional precision. Edge-case handling: zero yields 0; negative yields error; numeric types preserved.
\nIndustry/Region & Localization: SI units; voltage is system-dependent (e.g., 120 V nominal in US, 230 V in EU). The tool does not assume region but can present derived kWh. Currency not involved.
\nAssumptions & Exclusions: Nominal voltage; fixed input for Wh; no discharge curves or efficiency losses; not a runtime model; UI/front-end details excluded.

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