how do you say this sentence in spanish ..How much do you wiegh.

First of all decide if you are using the familiar tú with a friend or the formal usted.

¿Cuánto pesa usted (ud.)?
¿Cuánto pesas tú?

(not the most polite question!)

Sra

cuantos libras usted pesas?

To say "How much do you weigh?" in Spanish, you would say "¿Cuánto pesas?" Here's how you can break it down:

1. Start with the question word "how much," which is "cuánto" in Spanish.
2. Add the verb "to weigh," which is "pesar" in Spanish. However, we need to use the form that matches the second person singular (informal) "you." That form is "pesas."
3. Put these two parts together, and you have "¿Cuánto pesas?" which translates to "How much do you weigh?"