Interview for my first contract role — What rate range is standard?

I have an interview next week for my first contract role. 6-8 months, with a SaaS company.

I am admittedly really new to negotiating salaries, especially contract salaries. My current job is W2 at 70k, and I’m hoping to make more, but I’m having trouble balancing fair rate vs asking too much. Would love any advice you guys might have!