Watt Hours to Amp Hours Calculator

Convert watt-hours to amp-hours at any voltage, size solar banks and inverters. Ah = Wh ÷ V.

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Formula

Amp-hours = watt-hours ÷ volts (Ah = Wh ÷ V). The same 1,200 Wh is 100 Ah at 12 V but only 25 Ah at 48 V

Examples

InputResult
1,200 Wh at 12 V100 Ah
1,200 Wh at 48 V25 Ah
5,000 Wh at 24 V208.3 Ah

Frequently Asked Questions

How do you convert watt hours to amp hours?

Divide by voltage: Ah = Wh ÷ V. A 1,200 Wh solar bank on a 12 V system is 100 Ah; moving the same bank to 48 V needs only 25 Ah of cells.

Does higher voltage reduce Ah requirements?

Yes, quadrupling the voltage quarters the Ah for the same energy, which is why off-grid homes favor 48 V: thinner cables, less loss, same Wh.

Is Ah or Wh the better comparison?

Wh, it is energy and voltage-independent. '100 Ah' means completely different energy at 12 V vs 48 V; Wh never lies.

Related Calculators

Watts to Amps Calculator1500 Watts to Amps: 12.50 A at 120 V (6.25 A at 240 V)1000 Watts to Amps: 8.33 A at 120 V (4.17 A at 240 V)1800 Watts to Amps: 15.00 A at 120 V (7.50 A at 240 V)1200 Watts to Amps: 10.00 A at 120 V (5.00 A at 240 V)700 Watts to Amps: 5.83 A at 120 V (2.92 A at 240 V)250 Watts to Amps: 2.08 A at 120 V (1.04 A at 240 V)120 Watts to Amps: 1.00 A at 120 V (0.50 A at 240 V)100 Watts to Amps: 0.83 A at 120 V (0.42 A at 240 V)Voltage Drop CalculatorDC Voltage Drop CalculatormAh to Wh CalculatorWh to mAh Calculator100 Wh to mAhAmp Hours to Watt Hours CalculatorParallel Resistor CalculatorLED Resistor CalculatorWire Size CalculatorAmps to Watts CalculatorVA to Watts Calculator