# TRON Energy Calculator > Free TRON energy and bandwidth checker. Public EnergyLimit, leftover energy, bandwidth and frozen TRX; optional deep scan (network fee only). Not affiliated with the TRON Foundation. TRON Energy Calculator helps users read energy and bandwidth on a T-address before a TRC20 send. English is primary; key pages also exist in Chinese, Spanish, and Russian. ## Primary - [TRON Energy Calculator](https://tronenergycalculator.org/): Free energy, bandwidth, and frozen-TRX screen. Optional deep scan via wallet connect. - [Energy before USDT TRC20](https://tronenergycalculator.org/check/energy-before-usdt-trc20/): Resource check before a Tether send. - [FAQ](https://tronenergycalculator.org/faq/): Fees, official contract, freeze, languages, optional deep scan. ## Checks - [TRON energy checker](https://tronenergycalculator.org/check/tron-energy-checker/): Paste a T-address to see remaining TRON energy from EnergyLimit and EnergyUsed before a contract call or USDT TRC20 transfer. - [TRON bandwidth checker](https://tronenergycalculator.org/check/tron-bandwidth-checker/): See TRON bandwidth remaining on a T-address, how it differs from energy, and when a short meter burns TRX as NetFee. - [Energy before a USDT TRC20 send](https://tronenergycalculator.org/check/energy-before-usdt-trc20/): See whether a TRON account has enough energy for a USDT TRC20 send, why ~65k is only an estimate, and what happens if the tank is empty. - [Frozen TRX and energy](https://tronenergycalculator.org/check/tron-frozen-trx-energy/): See how frozen or staked TRX on a T-address maps to energy or bandwidth, and what the unfreeze lock means for the resource meter. - [TRON energy rental check](https://tronenergycalculator.org/check/tron-energy-rental/): Confirm whether rented TRON energy actually arrived as delegated EnergyLimit, and spot rental scams that ask for seeds or fake activation fees. - [Out of energy check](https://tronenergycalculator.org/check/out-of-energy/): See whether a TRON account is out of energy, what OUT_OF_ENERGY means, and how TRX burn or a failed USDT send follows an empty meter. - [Delegated energy check](https://tronenergycalculator.org/check/delegated-energy/): Read whether a TRON account’s energy comes from its own stake or from delegated energy, and what expiry or undelegate will do to EnergyLimit. ## Guides - [What is TRON energy?](https://tronenergycalculator.org/guides/what-is-tron-energy/): TRON energy is prepaid smart-contract compute from staked or delegated TRX. Learn EnergyLimit, EnergyUsed, and why it is not a TRX balance. - [What is TRON bandwidth?](https://tronenergycalculator.org/guides/what-is-tron-bandwidth/): TRON bandwidth pays for transaction size. Learn how it differs from energy, when NetFee burns TRX, and how staking for bandwidth works. - [How to freeze TRX for energy](https://tronenergycalculator.org/guides/how-to-freeze-trx-for-energy/): How freezing or staking TRX mints energy, how to choose energy versus bandwidth, and why unfreeze is delayed under Stake 2.0. - [How to unfreeze TRX](https://tronenergycalculator.org/guides/how-to-unfreeze-trx/): Unstaking TRX removes energy production and starts an unlock wait. Learn the order: undelegate first, then unfreeze, then withdraw. - [How to rent energy on TRON](https://tronenergycalculator.org/guides/how-to-rent-energy-on-tron/): Renting TRON energy is paid Stake 2.0 delegation. Learn how to verify EnergyLimit, compare rent vs stake, and avoid seed-phrase rental scams. - [Energy for USDT TRC20](https://tronenergycalculator.org/guides/energy-for-usdt-trc20/): USDT TRC20 transfers are contract calls that consume TRON energy. See why ~65k is an estimate, who pays, and how to prepare the sender. - [TRON energy calculator](https://tronenergycalculator.org/guides/tron-energy-calculator/): How to estimate whether EnergyLimit minus EnergyUsed covers a TRC20 transfer, and why calculators drift when chain parameters change. - [Stake TRX for energy](https://tronenergycalculator.org/guides/stake-trx-for-energy/): How Stake 2.0 mints TRON energy, how to delegate after staking, and why unstake uses an unlock wait instead of instant freeze release. - [Energy versus burning TRX](https://tronenergycalculator.org/guides/energy-vs-burning-trx/): When TRON burns TRX for energy or bandwidth, why that costs more than staking or renting, and how to see the burn on an explorer. - [Check energy in TronLink](https://tronenergycalculator.org/guides/check-energy-in-tronlink/): Where TronLink shows energy and bandwidth, how to match EnergyLimit with this checker, and why a resource screenshot is not a safety proof. - [How much energy for TRC20?](https://tronenergycalculator.org/guides/how-much-energy-for-trc20/): A typical USDT TRC20 transfer often needs about 65,000 energy. See why that is approximate, what changes the cost, and how to read remaining energy. ## Problems & glossary - [Out of energy](https://tronenergycalculator.org/problems/out-of-energy/): What to do when a TRON wallet says out of energy: confirm the sender’s remaining energy, stop retry burns, then stake or rent — never a seed phrase. - [USDT failed — no energy](https://tronenergycalculator.org/problems/usdt-failed-no-energy/): When a USDT TRC20 transfer fails for lack of energy: how to read the wallet error, why retries still cost, and how to fund the sender before signing again. - [TRON energy rental scam](https://tronenergycalculator.org/problems/tron-energy-rental-scam/): How fake TRON energy rental works: seed-phrase “delegation,” activation payments that never raise EnergyLimit, and what a real DelegateResource looks like. - [Not enough bandwidth](https://tronenergycalculator.org/problems/not-enough-bandwidth/): When TRON says not enough bandwidth: how NetFee burns TRX, why this is not an energy problem, and how staking for bandwidth fixes native transfers. - [Cannot undelegate energy](https://tronenergycalculator.org/problems/cannot-undelegate-energy/): Why Stake 2.0 undelegate fails during the lock, what to do instead of a seed-phrase unlock, and how to unwind delegated energy in the right order. - [Energy delegation expired](https://tronenergycalculator.org/problems/energy-delegation-expired/): When rented or delegated TRON energy expires, EnergyLimit falls and USDT may fail. See how to confirm expiry versus a drain, then restake or re-rent. - [TRON energy](https://tronenergycalculator.org/glossary/tron-energy/): Definition of TRON energy: prepaid smart-contract compute from stake or delegation, read as EnergyLimit versus EnergyUsed — not a safety score. - [TRON bandwidth](https://tronenergycalculator.org/glossary/tron-bandwidth/): Definition of TRON bandwidth: the resource that pays for transaction size, read as BandwidthLimit versus BandwidthUsed, separate from energy. - [Freeze TRX](https://tronenergycalculator.org/glossary/freeze-trx/): What freeze TRX means on TRON: locking TRX to mint energy or bandwidth, how it relates to Stake 2.0, and why unfreeze is delayed. - [Stake 2.0 energy](https://tronenergycalculator.org/glossary/stake20-energy/): Stake 2.0 on TRON: lock TRX to mint energy or bandwidth, delegate resource to another address, and unstake with an unlock delay. - [Delegate energy](https://tronenergycalculator.org/glossary/delegate-energy/): Delegating TRON energy points staked energy at another address. Learn locks, undelegate, rentals, and why your seed is never required. - [TRX burn for energy](https://tronenergycalculator.org/glossary/trx-burn-for-energy/): TRX burn for energy is the fallback when remaining energy cannot cover a contract call. Separate from NetFee bandwidth burns, and not reversible. ## Locales - [中文](https://tronenergycalculator.org/zh/) - [Español](https://tronenergycalculator.org/es/) - [Русский](https://tronenergycalculator.org/ru/) ## Optional - [Sitemap](https://tronenergycalculator.org/sitemap.xml) - [robots.txt](https://tronenergycalculator.org/robots.txt)