For checking the required fee to send a transaction cheap and fast, I'm using this one because it's very detailed and despite of that easy to understand. In addition the site offers different charts:
- Unconfirmed Transaction Count (Mempool)
- Pending transaction fee in BTC
- Mempool Size in MB
Mempool Size in MB is optimal to get an impression for determining the fee. If you are interested, here's more information about saving valuable
BTC instead of wasting them for fees:
Make sure to avoid wasting BTC for too high fees step by step guide (Electrum)And sometimes you'll see people paying way too much.


(Someone paid a 0.1
BTC fee for a single transaction)
Most of the other sites are recommending a very high fee while it's not really necessary to pay so much even if you want to have your transaction included in the next block.