Milliwatts to Watts Conversion Calculator

Milliwatts to Watts Calculator

Enter power in milliwatts:

Result in watts: W

A milliwatts to watts calculator converts small power measurements between milliwatts (mW) and watts (W). This conversion is essential for:
✅ Electronics design (circuit power consumption)
✅ RF engineering (signal transmission power)
✅ Medical devices (low-power equipment)
✅ Wireless sensors (IoT device power budgets)

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Conversion Formulas

1. Milliwatts to Watts

$$P(W)=P(mW)\times 0.001\text{or}\frac{P(mW)}{1000}$$

Example:

• Convert 500 mW to Watts:

  $$500\times 0.001=0.5\text{ W}\text{or}500÷1000=0.5\text{ W}$$

2. Watts to Milliwatts

$$P(mW)=P(W)\times 1000$$

Example:

• Convert 0.03 W to mW:

  $$0.03\times 1000=30\text{ mW}$$

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Conversion Table (mW ⇆ W)

Milliwatts (mW)	Watts (W)
1 mW	0.001 W
10 mW	0.01 W
100 mW	0.1 W
500 mW	0.5 W
1,000 mW	1 W
5,000 mW	5 W
10,000 mW	10 W

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How to Use the Calculator

1. Enter mW → Get W (Divide by 1000)

2. Enter W → Get mW (Multiply by 1000)

Example Calculations:

• 250 mW to W:

  $$250÷1000=0.25\text{ W}$$

• 1.2 W to mW:

  $$1.2\times 1000=1,200\text{ mW}$$

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Practical Applications

• Bluetooth Devices: Typically transmit at 1-100 mW (0.001-0.1 W)

• Hearing Aids: Consume 1-10 mW (0.001-0.01 W)

• Laser Pointers: Often 5 mW (0.005 W)

• WiFi Routers: Transmit at 100-200 mW (0.1-0.2 W)

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Power Unit Hierarchy

Unit	Watts Equivalent	Milliwatts Equivalent
1 mW	0.001 W	1 mW
1 W	1 W	1,000 mW
1 kW	1,000 W	1,000,000 mW

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FAQ

1. How many Watts are in 1 mW?

✅ 1 mW = 0.001 W

2. When would I need to convert mW to W?

🔹 When comparing small electronic components (mW) with larger power systems (W/kW)

3. Is 500 mW equal to 0.5 W?

✅ Yes – 500 mW = 0.5 W

4. How to convert 0.075 W to mW?

$$0.075\times 1000=75\text{ mW}$$

5. What's smaller than a milliwatt?

🔹 Microwatts (μW) – 1 mW = 1,000 μW