271 mAh Is How Many Wh?

Quick Answer: 271 mAh = 1.0027 Wh (at 3.7V)

mAh → Wh Wh → mAh
Milliamp-hours
=
Watt-hours
Auto-fills voltage
Nominal battery voltage
Conversion Result
271 mAh = 1.0027 Wh (at 3.7V)

At 3.7V nominal voltage

271 mAh = 1.0027 Wh (at 3.7V)

Step-by-step:

  1. Formula: Wh = mAh × V / 1,000
  2. 271 × 3.7 / 1,000 = 1.0027 Wh

Similar mAh to Wh Conversions

Values close to 271 mAh (at 3.7V Li-ion):

mAh Wh (at 3.7V)
1 mAh 0.0037 Wh
101 mAh 0.3737 Wh
201 mAh 0.7437 Wh
301 mAh 1.1137 Wh
401 mAh 1.4837 Wh
501 mAh 1.8537 Wh
601 mAh 2.2237 Wh
701 mAh 2.5937 Wh

Popular mAh to Wh Conversions

3,500 mAh12.95 Wh 4,000 mAh14.8 Wh 5,000 mAh18.5 Wh 6,000 mAh22.2 Wh 10,000 mAh37 Wh 15,000 mAh55.5 Wh 20,000 mAh74 Wh 26,800 mAh99.16 Wh 50,000 mAh185 Wh 500 mAh1.85 Wh 1,000 mAh3.7 Wh 1,500 mAh5.55 Wh

See Also

Frequently Asked Questions

How many Wh is 271 mAh?

271 mAh equals 1.0027 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 271 mAh to Wh?

Multiply 271 by the battery voltage, then divide by 1,000. At 3.7V: 271 × 3.7 / 1,000 = 1.0027 Wh.

Is 271 mAh allowed on a plane?

At 3.7V, 271 mAh = 1.0027 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