[Home](./index.md) > [@firebase/firestore](./firestore.md) > [lite](./firestore_lite.md) > [Timestamp](./firestore_lite.timestamp.md) > [toMillis](./firestore_lite.timestamp.tomillis.md) ## Timestamp.toMillis() method Converts a `Timestamp` to a numeric timestamp (in milliseconds since epoch). This operation causes a loss of precision. Signature: ```typescript toMillis(): number; ``` Returns: number The point in time corresponding to this timestamp, represented as the number of milliseconds since Unix epoch 1970-01-01T00:00:00Z.