Ronnabytes (RB) to Megabytes (MB) Converter
Convert ronnabytes to megabytes.
1 RB = 1e21 MB
How to convert RB to MB
File sizes here use the decimal (SI) system, the same one drive makers and network providers use. In that system 1 Ronnabyte is 1027 bytes and 1 Megabyte is 106 bytes. Divide one by the other and you get the ratio between the two units: 1027 ÷ 106 = 1021.
Ronnabyte is the bigger unit, so you multiply. Every RB holds 1021 MB, which means the decimal point moves 21 places to the right.
On the ladder (B → KB → MB → GB → TB → PB → EB → ZB → YB → RB → QB) these two are 7 steps apart. Every step is a factor of 1,000, so 7 steps means 1,000 multiplied by itself 7 times, which is 1021.
The formula
MB = RB × 10211 RB = 1 × 1021 MB1021 means 1 followed by 21 zeros
Worked example 1: Converting 1 RB
1 RB × 1021 = 1 × 1021 MBThe decimal point moves 21 places to the right.
The ronnabyte is a new name that exists so future data totals have a label.
Worked example 2: Converting 0.5 RB
0.5 RB × 1021 = 5 × 1020 MBThe decimal point moves 21 places to the right.
Worked example 3: Converting 12.75 RB
12.75 RB × 1021 = 1.275 × 1022 MBThe decimal point moves 21 places to the right.
Need the other direction? Open the MB to RB converter.
RB to MB examples
The ronnabyte is a new name that exists so future data totals have a label. In megabytes that is 1 × 1021 MB.
| RB | MB |
|---|---|
| 1 RB | 1 × 1021 MB |
| 2.5 RB | 2.5 × 1021 MB |
| 10 RB | 1 × 1022 MB |
| 50 RB | 5 × 1022 MB |
| 100 RB | 1 × 1023 MB |
| 500 RB | 5 × 1023 MB |
| 1,000 RB | 1 × 1024 MB |
Where RB to MB comes up
Ronna- is the SI prefix for 1027, adopted in November 2022, so a ronnabyte is 1,000 yottabytes. Ronnabytes are new and mostly theoretical. You will see them in unit tables and in pieces about how big future data totals might get.
A megabyte is 1,000 kilobytes, about a minute of MP3 audio at 128 kbps. Megabytes are what you see on photos, PDFs, songs and slide decks, and they sit behind most email attachment and upload limits.
Going from ronnabytes down to megabytes always gives a bigger number, because the unit you land on is smaller. It is the usual direction when a limit or a form asks for a smaller unit than the one you have in mind.
RB to MB FAQ
How many megabytes are in 1 ronnabyte?
There are 1021 megabytes in 1 ronnabyte, so 1 RB = 1021 MB.
Is RB to MB decimal or binary?
This page is decimal (SI), where 1 KB = 1,000 B. Operating systems often count in powers of 1,024 and still print KB, MB or GB, when they really mean KiB, MiB and GiB. At RB the gap is wider still.
How do I convert MB to RB?
Go the other way: divide by 1021, which moves the decimal point 21 places to the left. The swap button on the converter does it for you.