321 mAh Is How Many Wh?

Quick Answer: 321 mAh = 1.1877 Wh (at 3.7V)

mAh → Wh Wh → mAh
Milliamp-hours
=
Watt-hours
Auto-fills voltage
Nominal battery voltage
Conversion Result
321 mAh = 1.1877 Wh (at 3.7V)

At 3.7V nominal voltage

321 mAh = 1.1877 Wh (at 3.7V)

Step-by-step:

  1. Formula: Wh = mAh × V / 1,000
  2. 321 × 3.7 / 1,000 = 1.1877 Wh

Similar mAh to Wh Conversions

Values close to 321 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
801 mAh 2.9637 Wh

Popular mAh to Wh Conversions

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 15,000 mAh55.5 Wh 20,000 mAh74 Wh 26,800 mAh99.16 Wh

See Also

Frequently Asked Questions

How many Wh is 321 mAh?

321 mAh equals 1.1877 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 321 mAh to Wh?

Multiply 321 by the battery voltage, then divide by 1,000. At 3.7V: 321 × 3.7 / 1,000 = 1.1877 Wh.

Is 321 mAh allowed on a plane?

At 3.7V, 321 mAh = 1.1877 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