Gas tracker

Network?	Base fee?	Low?	Average?	Fast?	Transfer?	Token send?	Swap?	Coin price?
Ethereum	0.042	0.042	0.046	0.667	<$0.01	<$0.01	$0.02	ETH $2,293
BaseL2	0.0050	0.0054	0.0096	0.013	<$0.01	<$0.01	<$0.01	ETH $2,293
Arbitrum OneL2	0.020	0.020	0.020	0.020	<$0.01	<$0.01	<$0.01	ETH $2,293
OP MainnetL2	<0.001	<0.001	<0.001	0.0050	<$0.01	<$0.01	<$0.01	ETH $2,293
Polygon PoS	245	293	323	355	<$0.01	<$0.01	<$0.01	POL $0.0904
BNB Chain	–	0.050	0.050	0.050	<$0.01	<$0.01	<$0.01	BNB $712.63
Avalanche C-Chain	2.55	2.80	2.93	3.03	<$0.01	<$0.01	<$0.01	AVAX $8.65

• Ethereum0.046 gwei
  Transfer
  <$0.01Token
  <$0.01Swap
  $0.02
• Base0.0096 gwei
  Transfer
  <$0.01Token
  <$0.01Swap
  <$0.01
• Arbitrum One0.020 gwei
  Transfer
  <$0.01Token
  <$0.01Swap
  <$0.01
• OP Mainnet<0.001 gwei
  Transfer
  <$0.01Token
  <$0.01Swap
  <$0.01
• Polygon PoS323 gwei
  Transfer
  <$0.01Token
  <$0.01Swap
  <$0.01
• BNB Chain0.050 gwei
  Transfer
  <$0.01Token
  <$0.01Swap
  <$0.01
• Avalanche C-Chain2.93 gwei
  Transfer
  <$0.01Token
  <$0.01Swap
  <$0.01

Gas numbers are in gwei (billionths of the network's coin). Gwei is the unit on each chain, so 1 gwei on Polygon (POL) costs far less than 1 gwei on Ethereum (ETH). Dollar costs use the "Average" price and typical gas: transfer 21,000 (fixed), token send ~65,000, swap ~150,000; real swaps vary with the route.

From Solana's getRecentPrioritizationFees for the Jupiter program: the minimum priority fee that landed in each recent slot. Wallets often add more to be safe.