GB to MB Converter

Convert gigabytes (GB) to megabytes (MB) using decimal storage units used for drive capacity, files, and transfer sizes.

One decimal gigabyte equals exactly 1,000 megabytes. If a specification uses binary powers, select GiB and MiB instead of GB and MB.

How to use the converter

Choose a measurement category and two units, then enter any finite positive or negative value allowed by that measurement. Adjust decimal places when the result needs more detail. Swap Units reverses the direction without discarding the current value.

Available unit converters

Length · Area · Volume · Weight · Temperature · Speed · Pressure · Energy · Power · Data Storage · Frequency · Time · Angle

Popular unit conversions

Celsius to Fahrenheit · Fahrenheit to Celsius · KG to LBS · LBS to KG · CM to Inches · Inches to CM · KM to Miles · Miles to KM · Liters to Gallons · Gallons to Liters · MB to GB · GB to MB

Calculations run locally. Display precision only changes the visible result; the converter keeps the full JavaScript numeric value for the next calculation.