How to calculate freelancing rate?

For more context, I’m an Android dev with 4yrs exp. I have not done freelancing before. I’m approached by a company where they need a feature implementation in existing project. I estimated efforts to be around 4-5 days and complexity is medium. How do you calculate hourly rate based on that? Experienced freelancers please also let me know any other key things I should always do or keep in mind.

15mo ago
potatomato
potatomato

Always quote 2x more time than "you think it'll take".

Hourly rate depends on who you're billing. A good estimate can be your monthly net / 4 * 5 * 6 (4 weeks, 5 days, 6 hours)

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