3,261 mAh Is How Many Wh?

Quick Answer: 3,261 mAh = 12.0657 Wh (at 3.7V)

Milliamp-hours
=
Watt-hours
Auto-fills voltage
Nominal battery voltage
Conversion Result
3,261 mAh = 12.0657 Wh (at 3.7V)

At 3.7V nominal voltage

3,261 mAh = 12.0657 Wh (at 3.7V)

Step-by-step:

  1. Formula: Wh = mAh × V / 1,000
  2. 3,261 × 3.7 / 1,000 = 12.0657 Wh

Similar mAh to Wh Conversions

Values close to 3,261 mAh (at 3.7V Li-ion):

mAh Wh (at 3.7V)
761 mAh 2.8157 Wh
1,261 mAh 4.6657 Wh
1,761 mAh 6.5157 Wh
2,261 mAh 8.3657 Wh
2,761 mAh 10.2157 Wh
3,261 mAh 12.0657 Wh
3,761 mAh 13.9157 Wh
4,261 mAh 15.7657 Wh
4,761 mAh 17.6157 Wh
5,261 mAh 19.4657 Wh
5,761 mAh 21.3157 Wh

See Also

Frequently Asked Questions

How many Wh is 3,261 mAh?

3,261 mAh equals 12.0657 Wh at 3.7V (Li-ion nominal voltage). The exact Wh depends on the battery voltage: Wh = mAh × V / 1,000.

How do I convert 3,261 mAh to Wh?

Multiply 3,261 by the battery voltage, then divide by 1,000. At 3.7V: 3,261 × 3.7 / 1,000 = 12.0657 Wh.

Is 3,261 mAh allowed on a plane?

At 3.7V, 3,261 mAh = 12.0657 Wh. Airlines allow lithium batteries up to 100 Wh in carry-on luggage. Batteries between 100–160 Wh require airline approval. Batteries over 160 Wh are prohibited on passenger aircraft.

Formula: Wh = mAh × V / 1,000. Results assume nominal battery voltage.

Conversion factors verified against NIST, BIPM Based on SI definitions (BIPM). Last reviewed: March 2026
Tiago Fernandes Reviewed by Tiago Fernandes