I'm looking at various financial calculators to project how much I'll need to retire. The Nerdwallet calculator suggests that a user should estimate that their monthly retirement budget be about 70% of their monthly income before retiring.

For those of you who have retired, any feedback on what you found--------- percentage wise --------- you are spending on a monthly basis after retiring? Are you spending 50% per month of what you previously were earning monthly? Are you spending around the 70% Nerdwallet suggests? 100 percent? (my dad died right after retiring, but I think my mom spends about 30% of what their income was pretirement)

Here's the calculator I was looking at: https://www.nerdwallet.com/calculator/retirement-calculator