1,091 mAh Is How Many Wh?

Quick Answer: 1,091 mAh = 4.0367 Wh (at 3.7V)

mAh → Wh Wh → mAh
Milliamp-hours
=
Watt-hours
Auto-fills voltage
Nominal battery voltage
Conversion Result
1,091 mAh = 4.0367 Wh (at 3.7V)

At 3.7V nominal voltage

1,091 mAh = 4.0367 Wh (at 3.7V)

Step-by-step:

  1. Formula: Wh = mAh × V / 1,000
  2. 1,091 × 3.7 / 1,000 = 4.0367 Wh

Similar mAh to Wh Conversions

Values close to 1,091 mAh (at 3.7V Li-ion):

mAh Wh (at 3.7V)
1 mAh 0.0037 Wh
501 mAh 1.8537 Wh
1,001 mAh 3.7037 Wh
1,501 mAh 5.5537 Wh
2,001 mAh 7.4037 Wh
2,501 mAh 9.2537 Wh
3,001 mAh 11.1037 Wh
3,501 mAh 12.9537 Wh

Popular mAh to Wh Conversions

50,000 mAh185 Wh 500 mAh1.85 Wh 1,000 mAh3.7 Wh 1,500 mAh5.55 Wh 2,000 mAh7.4 Wh 2,500 mAh9.25 Wh 3,000 mAh11.1 Wh 3,500 mAh12.95 Wh 4,000 mAh14.8 Wh 5,000 mAh18.5 Wh 6,000 mAh22.2 Wh 10,000 mAh37 Wh

See Also

Frequently Asked Questions

How many Wh is 1,091 mAh?

1,091 mAh equals 4.0367 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 1,091 mAh to Wh?

Multiply 1,091 by the battery voltage, then divide by 1,000. At 3.7V: 1,091 × 3.7 / 1,000 = 4.0367 Wh.

Is 1,091 mAh allowed on a plane?

At 3.7V, 1,091 mAh = 4.0367 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.

More mAh to Wh conversions

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
Adilson Fernandes By Adilson Fernandes
Tiago Fernandes Reviewed by Tiago Fernandes