31 mAh Is How Many Wh?

Quick Answer: 31 mAh = 0.1147 Wh (at 3.7V)

mAh → Wh Wh → mAh
Milliamp-hours
=
Watt-hours
Auto-fills voltage
Nominal battery voltage
Conversion Result
31 mAh = 0.1147 Wh (at 3.7V)

At 3.7V nominal voltage

31 mAh = 0.1147 Wh (at 3.7V)

Step-by-step:

  1. Formula: Wh = mAh × V / 1,000
  2. 31 × 3.7 / 1,000 = 0.1147 Wh

Similar mAh to Wh Conversions

Values close to 31 mAh (at 3.7V Li-ion):

mAh Wh (at 3.7V)
1 mAh 0.0037 Wh
11 mAh 0.0407 Wh
21 mAh 0.0777 Wh
31 mAh 0.1147 Wh
41 mAh 0.1517 Wh
51 mAh 0.1887 Wh
61 mAh 0.2257 Wh
71 mAh 0.2627 Wh
81 mAh 0.2997 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 31 mAh?

31 mAh equals 0.1147 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 31 mAh to Wh?

Multiply 31 by the battery voltage, then divide by 1,000. At 3.7V: 31 × 3.7 / 1,000 = 0.1147 Wh.

Is 31 mAh allowed on a plane?

At 3.7V, 31 mAh = 0.1147 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