ToolGrid AIBattery Runtime Estimator
Estimate runtime from battery capacity, voltage, load and usable efficiency.
Runs entirely in your browser — your selected files are not uploaded by this tool. Device-provided speech voices may use online services.
About this free battery runtime estimator tool
Estimate runtime from battery capacity, voltage, load and usable efficiency. Calculators answer a defined arithmetic question using the values you supply. Keep units and currencies consistent, choose the correct starting amount and inspect the assumptions before using a result. Estimates do not replace a lender quotation, an official tax rate, a medical assessment or a jurisdiction-specific deadline rule.
A practical example
A concrete example uses capacity (ah): 10; battery voltage (v): 12; load power (w): 60; usable capacity (%): 80. The result is Usable energy (Wh): 96 Runtime (hours): 1.6.
Before you rely on the result
Use consistent measurements and check packaging or manufacturer guidance. The estimate excludes unusual shapes, installation losses and site-specific requirements unless entered. Battery chemistry, aging and discharge rate can materially change runtime.