50 Ah to Wh
Enter amp-hours and battery voltage below — the watt-hours update instantly.
A 50 Ah battery at 12 V stores 600 Wh of energy, which is enough to run a standard 100W load for approximately 6 hours before fully depleting. At 24 V, the same 50 Ah capacity holds double the energy (1.200 Wh), and at 48 V it scales up to 2.400 Wh.
| Battery Capacity | Energy at 12V | Energy at 24V | Energy at 48V |
|---|---|---|---|
| 50 Ah | 600 Wh | 1.200 Wh | 2.400 Wh |
50 Ah is 600.0 Wh at 12 V DC. At other common voltages — 24 V: 1,200 Wh, 48 V: 2,400 Wh. Use the calculator below for any voltage or circuit type.
How do you convert Ah to Wh?
Multiply amp-hours by voltage: Wh = Ah × V. A 100 Ah battery at 12 V stores 100 × 12 = 1,200 Wh (1.2 kWh). Always use the battery's nominal voltage — a 100 Ah bank at 48 V holds four times the energy of the same 100 Ah at 12 V, because watt-hours scale directly with voltage.
Ah to Wh Formula
Amp-hours measure electric charge; watt-hours measure energy. Since energy = charge × voltage, multiplying capacity in Ah by the battery voltage gives the stored energy in Wh. This is why two batteries with the same Ah rating hold different energy if their voltages differ.
Ah to Wh at Common Battery Voltages
| Capacity | at 3.7 V | at 12 V | at 48 V |
|---|---|---|---|
| 2 Ah | 7.4 Wh | 24 Wh | 96 Wh |
| 5 Ah | 18.5 Wh | 60 Wh | 240 Wh |
| 10 Ah | 37 Wh | 120 Wh | 480 Wh |
| 50 Ah | 185 Wh | 600 Wh | 2,400 Wh |
| 100 Ah | 370 Wh | 1,200 Wh | 4,800 Wh |
| 200 Ah | 740 Wh | 2,400 Wh | 9,600 Wh |
In practice: a 50 Ah lithium trolling battery
At 12.8 V nominal a 50 Ah LiFePO4 pack holds 640 Wh, against roughly 600 Wh for a 12 V lead-acid equivalent. The difference that matters is usable capacity: lithium gives up nearly all of it, while lead-acid should not drop below half charge if you want reasonable cycle life. In day-to-day terms that makes a 50 Ah lithium pack broadly equal to a 100 Ah flooded battery.
Frequently Asked Questions
How do I convert Ah to Wh?
Multiply amp-hours by voltage: Wh = Ah × V. A 100 Ah battery at 12 V stores 100 × 12 = 1,200 Wh. Always use the battery's nominal voltage.
How many watt-hours is a 100Ah 12V battery?
100 Ah × 12 V = 1,200 Wh (1.2 kWh). At 24 V it would be 2,400 Wh; at 48 V, 4,800 Wh — the energy scales with voltage.
Which voltage should I use for the conversion?
Use the nominal voltage — 3.7 V for a Li-ion cell, 12 V for lead-acid, 48 V for a solar bank. It represents the average voltage across a discharge, which the preset buttons above fill for you.
What is the difference between Ah and Wh?
Ah measures charge and ignores voltage; Wh measures energy and includes it. Because Wh = Ah × V, watt-hours are the fairer way to compare batteries of different voltages.