> For the complete documentation index, see [llms.txt](https://docs-core.allbridge.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs-core.allbridge.io/sdk/guides/utilities.md).

# Utilities

[Amount and fee calculations](/sdk/guides/utilities/amount-and-fee-calculations.md) - how to calculate send/receive amount and fee

[Transfer time](/sdk/guides/utilities/transfer-time.md) - how to calculate approximate transfer time

[Extra gas limits](/sdk/guides/utilities/extra-gas-limits.md) - how to calculate limits for extra gas