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Gas fees across chains

What gas is, why it varies, and how to pay less.

Where the spread and fees really go — the full guide to this subject.

Guides on this site

Do swap providers give better rates for larger trades

Yes, swap providers often give better rates for larger trades, but the improvement is not automatic or guar...

How a floating rate swap can change between the quote screen and the confirmation

The quoted price for a floating rate swap can differ from the final confirmation because the underlying mar...

How to read a swap quote so you see the real cost before you confirm

The real cost of a swap is never the single number at the top of the quote screen. You find it by comparing...

What is the spread in a crypto swap and how is it set

The spread in a crypto swap is the difference between the market price of an asset and the price you actual...

What part of a swap fee goes to the exchange and what goes to the network

None of the fee you pay for a swap is paid to the blockchain. Every bit of it goes to the exchange. The net...

Which blockchain gives you the lowest network fee for receiving swapped tokens

The blockchain with the lowest network fee for receiving swapped tokens is almost always a low-fee, high-th...

Why a fixed rate swap costs more than a floating rate one

A fixed rate swap costs more than a floating rate one because the provider charges a premium for guaranteei...

Why two swap sites show different final amounts for the same pair

Two swap sites show different final amounts for the same pair because each site applies its own combination...

Batch Transactions to Save Gas Using Multicall on Ethereum and L2s

Every Ethereum transaction pays a fixed cost before it does anything useful. That cost is 21,000 gas. It co...

Bridge vs CEX Withdrawal to L2 Which Path Has Lower Total Cost

The visible fee is rarely the full fee. Moving $1,000 to Arbitrum involves hidden costs that differ by path...

EIP-1559 base fee vs priority fee: how ethereum fees work now

Before August 2021, Ethereum fees were a single number. You set a gas price; if it was high enough, a miner...

ERC-20 transfer gas cost: how much you pay and why it varies

A plain Ether transfer costs 21,000 gas. That number is the baseline, the minimum work Ethereum requires to...

Ethereum gas tracker tools compared: etherscan, blocknative and more

You send a transaction on Ethereum and the fee changes by the minute. To avoid overpaying - or getting stuc...

Gas Limit vs Gas Used: What Actually Happens During a Transaction

This is the single most misunderstood distinction in gas mechanics. Most people assume the gas limit is wha...

Insufficient Funds for Gas Error: How to Fix It on Any Chain

You have the token. You see the balance. The transaction fails anyway. The error reads "insufficient funds ...

L1 vs L2 Execution: Where to Process Your Transaction to Pay Less

The cheapest place to transact is rarely the place you first think of. Ethereum L1 costs real money. L2s cu...

L2 Sequencer Fee vs L1 Security Fee: What You Actually Pay on Rollups

Every transaction on a rollup like Optimism or Arbitrum has two cost components. The smaller one is the seq...

NFT Mint Gas Cost: Why Some Mints Cost 200,000 Gas and Others Less

You click "mint" on an NFT project. One costs 80,000 gas. Another runs toward 200,000 gas or more. Why such...

Out of Gas Error What It Means and How to Fix It

An "out of gas" error means a transaction consumed its entire gas limit before the network could finish exe...

Private Mempool vs Public on Ethereum Flashbots and MEV Protection

The public mempool is Ethereum's waiting room for unconfirmed transactions. When you submit a transaction, ...

Stuck Ethereum Transaction: How to Cancel or Speed It Up

A stuck Ethereum transaction isn't typically broken. It's waiting for confirmation in a queue the network p...

Uniswap Swap Gas Cost What Affects the Fee and V2 vs V3 Differences

A Uniswap swap costs between 100,000 and 300,000+ gas on Ethereum mainnet. That range is wide because sever...

What Is Gas in Crypto Transactions and Why Do You Pay It

Start here: gas is not a currency. It is a unit of measurement. It measures computational work. Every actio...

Which Layer 2 Has the Lowest Gas Fees for Your Transaction Type

There is no single answer to which Layer 2 is cheapest. Gas costs depend heavily on the operation you want ...

Swap crypto

Live rates · no account
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You send from your own wallet straight to the exchanger — nothing to connect, no account, and you stay on this page throughout. Rates are indicative until a swap is opened.

The swap is carried out by an independent exchanger and the deposit address above is theirs. seapresale.xyz never holds, receives or controls your funds, has no key to that address, and earns a referral commission. Opening a swap sends your receiving address, IP, browser and timezone to the exchanger for their compliance checks; we store none of it. Check their terms, fees and country restrictions before sending anything.

Crypto news

Bitcoin Cools Off After $3 Billion ETF-Driven Surge

Bitcoin Magazine Bitcoin Cools Off After $3 Billion ETF-Driven Surge Bitcoin's run slowed down Friday after the Federal Reserve chief said inflation was too hot. Its run was charged by speculators throwing billions at the popular investment vehicles. This post Bitcoin Cools Off After $3 Billion…

Bitcoin Magazine ·

Headlines link to the original publishers. We don't reproduce their articles.

Crypto prices right now

Bitcoin (BTC)
$78,624
▼ -0.51% down 24h
Ethereum (ETH)
$2,464
▼ -1.95% down 24h
Solana (SOL)
$102.57
▼ -3.72% down 24h

Latest from seapresale.xyz

Do swap providers give better rates for larger trades

Yes, swap providers often give better rates for larger trades, but the improvement is not automatic or guaranteed. The mechanism behind this is called "tiered pricing" or "volume-based fee structures."

Where the spread and fees really go

You see one number when you start a swap. You receive a different number when it finishes. That difference is not simple. It is a chain of costs, some obvious and some hidden behind mechanical necessity. Understanding where the money goes is the single most useful thing you can d

What is the spread in a crypto swap and how is it set

The spread in a crypto swap is the difference between the market price of an asset and the price you actually receive when you trade it. It is set by the liquidity provider or the automated market-making algorithm that fills your order.

All guides →

How to convert crypto: on-chain vs off-chain

Off-chain (on an exchange)

Your trade happens inside the exchange's own ledger. Nothing touches the blockchain until you withdraw.

  • Cheapest and fastest for common pairs
  • Needs an account and usually ID verification
  • The exchange holds the coins until you withdraw them
  • Best for converting to and from cash

On-chain (a DEX or swap)

You swap from your own wallet. The transaction settles on the chain and you pay its fee.

  • No account, no custodian — you keep the keys
  • You pay network fees, which vary a lot by chain
  • Small or new tokens often only trade here
  • Slippage and thin liquidity are real costs on low-volume pairs
Before any on-chain swap: check the token's contract address against a block explorer, start with a small test amount, and review what you are approving — an unlimited token approval to an unknown contract is how most wallet drains actually happen.

Not financial advice. seapresale.xyz publishes market data and general information about digital assets. Crypto assets are volatile and you can lose everything you put in. Nothing here is a recommendation to buy, sell or hold, and we make no price predictions.

Prices are sourced from third parties and may be delayed or wrong. Verify anything you intend to act on against a primary source.