TRX (Tron) and TRC-20 USDT (Tether on the Tron network) are related assets — TRC-20 USDT runs on the Tron blockchain, meaning TRX is the network fee currency for USDT transactions on Tron. Many users hold TRX specifically to pay fees when moving USDT. Swapping TRX itself to USDT is a different operation and works the same way as any other non-custodial swap.
How to swap TRX to USDT
Select TRX as the send asset and USDT as the receive asset. Choose your USDT output network — TRC-20 keeps everything on the Tron network, ERC-20 moves the output to Ethereum. Enter the amount of TRX you want to convert. Provide your USDT wallet address. The service generates a TRX deposit address. Send TRX from your wallet — TronLink is the standard Tron wallet — to that address. USDT arrives when your TRX deposit confirms.
TRC-20 vs ERC-20 output
If you plan to keep using USDT on the Tron network — sending to other Tron addresses, using Tron-based DeFi, or paying fees with TRX — receiving TRC-20 USDT keeps everything in one ecosystem. If you want the USDT in an Ethereum wallet like MetaMask, choose ERC-20 output. The two are separate tokens on separate networks and cannot be sent to each other's addresses.
The TRX-as-fee-currency relationship
A practical note: if you are converting TRX to USDT specifically to hold USDT on the Tron network, keep a small amount of TRX in your Tron wallet after the swap. TRC-20 USDT transfers require TRX as the network fee — typically a small fraction of a TRX. A wallet holding only USDT and no TRX cannot send USDT without adding TRX for fees first.
TRX to USDT on Terce: Tron confirmations are fast, fees are low, and the swap requires no account or KYC. Choose TRC-20 output to stay on Tron, ERC-20 to move to Ethereum.