solana-fee-calculator is used at run time in 121 crates (of which 1 optionally). It is a direct run-time dependency in 2 crates. It's used only as a dev dependency in 7 crates.

Depender (with downloads and own rev deps) solana-fee-calculator version
1.1M 546 solana-program =2.1.0
170 solana-nonce ^2.1.0