Data conversion calculators

How to choose and check a conversion

Digital quantities may use decimal or binary conventions. Decimal kilo, mega, and giga scale by 1,000. Binary kibi, mebi, and gibi scale by 1,024. Some software uses familiar decimal labels while calculating with binary values, which explains many apparent capacity differences.

Eight bits make one byte. Internet connection rates are commonly advertised in bits per second, while files are usually measured in bytes. Dividing a megabit rate by eight gives the theoretical megabytes per second before protocol overhead and other real-world limits.

Check the convention shown by the calculator rather than assuming every prefix is identical. Storage-device packaging, operating systems, cloud services, and networking tools may each display the same underlying quantity differently.

Accuracy and sources

Convertly keeps additional precision during calculation and rounds the display for readability. Match the final precision to the source measurement and the purpose of the answer. See our methodology and source policy for definitions, primary references, limitations, and correction procedures.

Exact definitions, estimates, and rounding

Some unit relationships are exact definitions, while a measured input is still limited by the instrument used to obtain it. A calculator can correctly apply an exact factor without making the original measurement more precise. Keep the original unrounded value, perform the conversion, and round the final result to a level appropriate for the task.

Use the stated formula to check the direction of the conversion. When possible, test a familiar value such as 1, 10, or 100 before relying on an unfamiliar result. For professional, regulated, health, safety, or contractual work, confirm the required convention and rounding rule in the controlling standard or document.