Convert 1 Gigagram per Square Kilometer to Microgram per Square Millimeter

1 Gg/km² (Gigagram per Square Kilometer) is equal to 1,000 µg/mm² (Microgram per Square Millimeter). To convert from Gigagram per Square Kilometer to Microgram per Square Millimeter, multiply by 1,000 or divide by 0.001.

• 1 Gg/km² × 1000 = 1000 µg/mm²
• 1 Gg/km² ÷ 0.001 = 1000 µg/mm²