Sun to TRX Converter

Q: How many sun are in 1 TRX?

1,000,000 (106). One sun is 0.000001 TRX. The unit is named after Tron's founder, Justin Sun.

Q: Where do I see sun?

In TronGrid API responses (balance fields), in the amount of raw transactions, and in TronScan's advanced views. Wallets like TronLink display TRX.

What is a sun to TRX converter?

A sun to TRX converter divides an integer sun count by 10⁶ to express it in TRX and multiplies by 10⁶ to go back. Sun is the smallest unit of Tron's native token: every amount in a TransferContract, every balance returned by a node and every fee figure in a transaction receipt is an integer in sun, and TRX with 6 decimals is the wallet display.

Tron units table

Unit	Sun	TRX
sun	1	0.000001
TRX	1,000,000	1

Examples

A TronGrid balance of 2500000000 sun is 2,500 TRX.
Sending 0.5 TRX means amount: 500000 in a TransferContract.
Freezing 1,000 TRX for energy is frozen_balance: 1000000000.

Worked example

A TronGrid account query returns "balance": 1234567890. Dividing by 1,000,000 gives 1,234.56789 TRX. A transaction receipt listing "fee": 345000 cost 0.345 TRX. To send 12.5 TRX you build a TransferContract with amount: 12500000. Because 10⁶ is small, floating point rarely loses precision here, but mixing sun and TRX in the same calculation is the usual source of amounts that are a million times too large or too small.

Smallest units across chains

Chain	Smallest unit	Units per coin	Decimals
Tron	sun	1,000,000	6
Bitcoin	satoshi	100,000,000	8
Solana	lamport	1,000,000,000	9
Ethereum	wei	10¹⁸	18

Common mistakes

Treating a TRC-20 amount as sun. USDT on Tron also uses 6 decimals, so the raw numbers look identical, but they are token units in the USDT contract, not TRX.
Setting fee_limit in TRX. The fee_limit field of a smart-contract call is in sun; 100 TRX must be written as 100000000.
Off-by-a-million amounts. Passing 1 when you meant 1 TRX sends 1 sun. Always convert before building the transaction.

Related tools

Convert a T… address to hex for API calls with the Tron address converter, or generate a receiving code with the USDT TRC-20 QR generator.

Frequently asked questions

How many sun are in 1 TRX?

1,000,000 (10⁶). One sun is 0.000001 TRX. The unit is named after Tron's founder, Justin Sun.

Where do I see sun?

In TronGrid API responses (balance fields), in the amount of raw transactions, and in TronScan's advanced views. Wallets like TronLink display TRX.

What are energy and bandwidth prices in sun?

Energy is priced at 100 sun per unit and bandwidth at 1,000 sun per byte when you have no staked resources, so a USDT TRC-20 transfer that burns about 65,000 energy costs roughly 6,500,000 sun = 6.5 TRX (prices are set by the network and may change).

Is sun the same as a TRC-20 token's smallest unit?

No. Sun is the smallest unit of TRX only. A TRC-20 token defines its own decimals in its contract; USDT happens to use 6 as well, but other tokens use 18 or other values.

What does a plain TRX transfer cost in sun?

A TRX transfer consumes roughly 250 to 270 bytes of bandwidth. Accounts receive a daily allowance of free bandwidth that usually covers a few transfers; beyond it, bandwidth is bought at 1,000 sun per byte, so one transfer burns around 270,000 sun (0.27 TRX).

Does USDT on Tron use sun?

No. USDT TRC-20 has 6 decimals of its own, so 1 USDT is stored as 1,000,000 in the contract. The numbers coincide with sun, but they are token units. Use the token decimals converter.