Amps to Watts Calculator
Disclaimer: Whilst every effort has been made in building this calculator, we are not to be held liable for any damages or monetary losses arising out of or in connection with the use of it. This tool is here purely as a service to you, please use it at your own risk. Full disclaimer. Do not use calculations for anything where loss of life, money, property, etc could result from inaccurate calculations.
How to convert amps to watts
The formula for converting amps to watts (at a fixed voltage) is watts = amps × volts. To convert amps to watts you multiply your amps figure by the voltage.
Example conversions
- 15 amps × 120 volts = 1800 watts
- 20 amps × 120 volts = 2400 watts
Amps to watts at 120V (AC) chart
| Amps: | Watts (at 120V): |
|---|---|
| 1 amps | 120 watts |
| 2 amps | 240 watts |
| 3 amps | 360 watts |
| 4 amps | 480 watts |
| 5 amps | 600 watts |
| 6 amps | 720 watts |
| 7 amps | 840 watts |
| 8 amps | 960 watts |
| 9 amps | 1080 watts |
| 10 amps | 1200 watts |
| 11 amps | 1320 watts |
| 12 amps | 1440 watts |
| 13 amps | 1560 watts |
| 14 amps | 1680 watts |
| 15 amps | 1800 watts |
| 16 amps | 1920 watts |
| 17 amps | 2040 watts |
| 18 amps | 2160 watts |
| 19 amps | 2280 watts |
| 20 amps | 2400 watts |
| 30 amps | 3600 watts |
| 40 amps | 4800 watts |
| 50 amps | 6000 watts |
| 60 amps | 7200 watts |
| 70 amps | 8400 watts |
| 80 amps | 9600 watts |
| 90 amps | 10800 watts |
| 100 amps | 12000 watts |
| Note: conversions are a guide only. | |
Amps to watts at 12V (DC) chart
| Amps: | Watts (at 12V): |
|---|---|
| 1 amps | 12 watts |
| 2 amps | 24 watts |
| 3 amps | 36 watts |
| 4 amps | 48 watts |
| 5 amps | 60 watts |
| 6 amps | 72 watts |
| 7 amps | 84 watts |
| 8 amps | 96 watts |
| 9 amps | 108 watts |
| 10 amps | 120 watts |
| 11 amps | 132 watts |
| 12 amps | 144 watts |
| 13 amps | 156 watts |
| 14 amps | 168 watts |
| 15 amps | 180 watts |
| 16 amps | 192 watts |
| 17 amps | 204 watts |
| 18 amps | 216 watts |
| 19 amps | 228 watts |
| 20 amps | 240 watts |
| 30 amps | 360 watts |
| 40 amps | 480 watts |
| 50 amps | 600 watts |
| 60 amps | 720 watts |
| 70 amps | 840 watts |
| 80 amps | 960 watts |
| 90 amps | 1080 watts |
| 100 amps | 1200 watts |
| Note: conversions are a guide only. | |
How to convert amps to watts manually
The Watt’s Law formula is all that’s needed for these unit conversions. The wattage (power produced / P) is calculated by multiplying the amps (current / I) by the voltage (V):
Power (P) = Current (I) x Voltage (V)
So…
watts = amps × volts
Example: 5 amps are being sent at 120 volts. What’s the wattage?
Power = Current x Voltage
Power = 5A x 120V
Power = 600W
Content reviewed by Derek Bulled, Director of CDS Electrical and an approved electrician with over 30 years of experience.
If you have any problems using this amps and watts converter, please contact me.
