> For the complete documentation index, see [llms.txt](/ja/llms.txt).

rBTC is the token used to [pay for the execution](/concepts/rbtc/gas/) of transactions in Rootstock. You can [convert BTC into rBTC](conversion.md) by sending BTC through the [Powpeg](/concepts/foundations/powpeg/) (both in Testnet and Mainnet), or by using the [faucet in Testnet](https://faucet.rootstock.io/), or via decentralized exchanges.

:::info[Additional Faucet Options (Please note these faucets may have daily limits)]

- Use [Thirdweb Faucet](https://thirdweb.com/rootstock-testnet): This faucet offers a convenient way to get free test rBTC tokens for development and testing. Its max daily token allocation is `0.01` tRBTC.
- Use [Blast Faucet](https://blastapi.io/faucets/rootstock-testnet): This faucet offers a convenient way to get free test rBTC tokens for development and testing. It has a higher max daily token allocation of `0.1` tRBTC.

:::

See [supported wallets](/dev-tools/wallets/).

Get rBTC

## rBTC (Mainnet)

Token Name
[rBTC](https://coinmarketcap.com/currencies/rsk-smart-bitcoin/)

Total Supply
21,000,000 rBTC

Circulating supply
[API](https://be.explorer.rootstock.io/circulating)

Contract Type
Native ([Bridge contract](https://explorer.rootstock.io/address/0x0000000000000000000000000000000001000006))

How to get

[Exchanges and Bridges to get rBTC](https://rootstock.io/rbtc/#get-rbtc)

## tRBTC (Testnet)

Token Name
tRBTC

Total Supply
21,000,000 tRBTC

Circulating supply
[API](https://be.explorer.testnet.rootstock.io/circulating)

Contract Type
Native ([Bridge contract](https://explorer.testnet.rootstock.io/address/0x0000000000000000000000000000000001000006))

How to get

[Faucet](https://faucet.rootstock.io)