Formatting

AI SDK Token Usage provides two small but useful utility functions for formatting token amounts and prices in a consistent, human-readable way.

Formatting token amount

To format a token amount, use the formatTokenAmount utility.

import { formatTokenAmount } from 'ai-sdk-token-usage';

formatTokenAmount(15230); // '15.2K'
formatTokenAmount(1000000); // '1M'

This function takes a numeric token count and returns a compact, localized string (e.g. 1K, 2.5M).

Formatting price

To format a price, use the formatPrice utility.

import { formatPrice } from 'ai-sdk-token-usage';

formatPrice(0.032); // '$0.03'
formatPrice(1.2, 'EUR'); // '€1.20'

This function formats a numeric value as a currency string. By default, it uses USD, but you can pass any valid ISO 4217 currency code.