EZ
Virtual Tools | Marine
Hub
Petroleum
All Calculators
Battery
State
Calculator
Estimate battery state of charge from voltage and specific gravity readings
Input Parameters
Battery Voltage (resting) (V)
Specific Gravity
Battery Type
Flooded Lead-Acid
AGM
Gel
LiFePO4
Electrolyte Temp (°F)
Calculate
Results
--
SOC from Voltage
%
--
SOC from Sp.Gravity
%
--
Temp-Corrected SG
--
Battery Condition
Reference
12V Lead-Acid resting voltage: 12.73V=100%, 12.06V=25%, 11.5V=0% SG: 1.265=100%, 1.100=0% Temp correction: +0.004 per 10°F above 77°F LiFePO4: flat voltage curve 13.0-13.4V for 10-90% SOC