Minimalist billing tools for freelancers and solo developers. Calculate rates, track time, and generate invoices — no account needed.
Based on 8 hours/day, 40 hours/week, 160 hours/month.
Derived hourly rate: $0.00
Adjustment Amount: $0.00
Billable days: 0
Calculation excludes weekends (Saturdays & Sundays).
A freelance invoice calculator helps you work out how much to charge a client based on your rate and time worked — by hour, day, week, or month. time2bill also counts billable weekdays between two dates and adjusts monthly invoices for extra or missed days, with no account required.
Divide your fixed project price by the number of hours you expect to work. For example, a $1,600 weekly project (40 hours) equals $40/hour. The Hourly Rate tab above does this automatically for daily, weekly, or monthly projects.
A standard working month has 20 working days (160 hours at 8 hours per day), excluding weekends. Public holidays are not automatically excluded — they vary by country and contract.
A day rate charges a fixed amount per working day (typically 8 hours). Hourly billing charges per hour actually worked. Day rates are simpler for clients, reduce disputes about partial hours, and are common in development and consulting work. Learn how to set your day rate →
Count only weekdays (Monday–Friday) between your start and end dates, then multiply by your daily rate. The Date Range tab above does this automatically. Read the full guide →