An estimation is a rough calculation of the value, number, quantity, or extent of something. For freelancing, this may relate to time estimation (how long a task will take to be completed) or cost estimation (how much to charge for completing a particular task).

An estimation is a rough calculation of the value, number, quantity, or extent of something.

It can be defined more precisely as the approximation, prediction, or projection of a quantity based on experience and/or information available at the time, with the recognition that other pertinent facts are unclear or unknown.

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