To calculate how much $21 an hour is per year, you need to know the number of hours worked in a year. A common assumption for full-time work is 40 hours per week and 52 weeks per year.

Calculation:

• Hourly wage: $21
• Hours per week: 40
• Weeks per year: 52

Annual salary = $21 × 40 × 52 = $21 × 2080 = $43,680 per year

Summary:

If you earn $21 an hour and work full-time (40 hours per week), you make approximately $43,680 per year before taxes and deductions.