---
title: "What Are Amps?"
canonical: "https://ampstowatt.com/what-are-amps/"
author: ""
published: "2026-09-05T09:08:12+00:00"
modified: "2026-09-05T09:08:12+00:00"
language: "en-US"
site: "Ampstowatt"
description: "Amps (amperes) measure electric current — how fast charge flows through a wire. Learn the SI definition, real examples, and how amps relate to volts…"
attribution: "Ampstowatt (https://ampstowatt.com/)"
---

# What Are Amps?

**Amps (amperes)** measure electric current — the rate at which electric charge flows through a conductor. One amp equals one coulomb of charge per second. Higher amperage means more current, which usually requires heavier wire and higher-rated breakers.

 

## Amps in Plain English

 

Think of voltage as electrical pressure and amps as flow rate. A 15A circuit breaker limits current to 15 amps. A hair dryer drawing 12A on a 120V outlet uses about 1,440 watts (12 × 120).

 

## How Amps Relate to Watts

 **Watts = Amps × Volts** (DC and resistive AC) 

For AC motors and compressors, include power factor: **W = A × V × PF**. Use our [amps to watts calculator](/) for instant results.

 

## Common Amp Ratings

 

| Circuit | Typical Amps | Use |
| --- | --- | --- |
| USB charger | 1–2 A | Phone and tablet charging |
| 15A breaker | Up to 15 A | US standard branch circuit |
| EV Level 2 | 32–48 A | 240V home charging |
| 100A service | Up to 100 A | Main panel capacity |

      Hub  

## Apply This Knowledge

     **Start with the main conversion tool** 

Use these calculator pages to apply the concept to real current, voltage, watts, and power-factor problems.[Amps to Watts Calculator](/)

  [W**Amps to Watts Calculator**Main calculator hub and formula reference](/)[AC**AC Amps to Watts Calculator**Apply power factor to AC current](/ac-amps-to-watts-calculator/)[DC**DC Amps to Watts Calculator**Use the direct DC watts formula](/dc-amps-to-watts-calculator/)[A**Watts to Amps Calculator**Find current from known watts and volts](/watts-to-amps-calculator/)[FX**Amps to Watts Formula**Review the formulas behind the tools](/amps-to-watts-formula/)[TAB**Conversion Charts**Compare common amp, volt, and watt values](/conversion-charts/)[PF**Power Factor**Understand real power in AC circuits](/power-factor/)     Advertisement