What Is SUN in TRON: Energy Pricing and Why 1 TRX Equals 1M SUN
A detailed explanation of what SUN is in the TRON network, how SUN is connected to Energy, TRC-20 fees, and USDT transfers. Learn why 1 TRX = 1,000,000 SUN and how Energy pricing is calculated.
What Is SUN in the Context of TRON Energy
In the TRON ecosystem, users often encounter the term SUN, especially when renting Energy, paying transaction fees, and analyzing TRC-20 transaction costs. For beginners, this can seem confusing: why is the Energy price displayed in SUN instead of TRX? How do you convert SUN to TRX, and why does this unit even exist?
In this article, we’ll explain what SUN is in the TRON network, how it is connected to Energy, why Energy marketplaces use SUN, and how transaction costs are calculated.
What Is SUN in the TRON Network
SUN is the smallest unit of the TRX cryptocurrency in the TRON blockchain.
It works similarly to:
satoshi in Bitcoin, wei in Ethereum, cents in fiat currencies. SUN to TRX Ratio
1 TRX=1000000 SUN
This means:
1 SUN = 0.000001 TRX 100 SUN = 0.0001 TRX 1,000,000 SUN = 1 TRX
That is why almost all internal calculations in the TRON network are performed in SUN.
Why TRON Energy Is Calculated in SUN
When a user rents Energy in the TRON network for sending USDT TRC-20 or interacting with smart contracts, the price is usually displayed as:
50 SUN per Energy 100 SUN per Energy 150 SUN per Energy
This is because TRON smart contracts operate using the network’s smallest unit — SUN.
For example:
if the Energy price = 100 SUN, and the transaction requires 65,000 Energy,
then the total cost will be:
65000×100=6500000 SUN
or:
6500000 SUN=6.5 TRX
Where SUN Is Used in the TRON Ecosystem
SUN is used almost everywhere inside the TRON network:
1. Transaction Fees
All network fees are calculated in SUN.
2. Energy Rental
Energy marketplaces display prices in SUN per unit of Energy.
3. Smart Contracts
Contracts inside the TRON Virtual Machine operate using SUN.
4. Voting and Staking
Some internal TRON mechanics also use SUN for calculations.
5. APIs and Development
Developers working with TRON APIs always receive values in SUN.
How to Convert SUN to TRX
The formula is very simple:
TRX= 1000000 SUN
Examples:
SUN TRX 100,000 SUN 0.1 TRX 1,000,000 SUN 1 TRX 10,000,000 SUN 10 TRX Why Energy Marketplaces Use SUN Instead of TRX
Using SUN allows platforms to:
display prices more accurately, avoid fractional values, simplify blockchain calculations, standardize APIs and smart contracts.
For example:
instead of displaying:
0.000085 TRX per Energy
it is much more convenient to use:
85 SUN per Energy. SUN and the SUN Token Are Not the Same Thing
Many beginners confuse:
SUN as a unit of TRX, and the SUN token.
These are completely different things.
SUN as a Unit
The smallest fraction of TRX.
SUN Token
A separate DeFi token in the TRON ecosystem associated with SUN Token.
How SUN Affects USDT TRC-20 Transfer Costs
When transferring USDT on the TRON network, the fee depends on:
the current Energy price, network congestion, the amount of required Energy.
If a user does not have Energy, the fee is charged in TRX, but the calculation is still performed through SUN.
That is why Energy marketplaces often display prices such as:
90 SUN, 110 SUN, 130 SUN.
This is essentially the cost of one unit of Energy.
Why Understanding SUN Matters When Renting Energy
Understanding SUN helps users:
compare marketplace offers, calculate fees correctly, avoid overpaying, analyze transaction costs, better understand how the TRON network works.
This is especially important for users who regularly send USDT TRC-20 or work with Energy rentals.