How the Income Calculator Works

This is a conversion tool. You enter an income amount in any time period (hour, day, week, month, or year), and the calculator shows what that same amount equals across all other periods. All numbers you enter stay in your browser — nothing is sent to a server.

This page documents how the math works. It is not financial, tax, or legal advice. Results are gross amounts only and do not account for taxes, deductions, or benefits.

Step 1: Convert your input to an annual amount

Whatever period you enter, the calculator first normalizes it to a yearly figure:

From year: use as-is
From month: amount × 12
From week: amount × weeks per year
From day: amount × (days per week × weeks per year)
From hour: amount × (hours per day × days per week × weeks per year)

Step 2: Break the annual amount into other periods

Per month = annual ÷ 12
Per week = annual ÷ weeks per year
Per day = annual ÷ (days per week × weeks per year)
Per hour = annual ÷ (hours per day × days per week × weeks per year)

Calculation modes

Calendar Year

Uses full-calendar assumptions — useful when you want to spread income across every day of the year.

24 hours per day
7 days per week
52 weeks per year
365 days per year

Business Days

Uses standard full-time work assumptions — useful for salary and freelance rate comparisons.

8 hours per day
5 days per week
52 weeks per year
260 working days per year

Advanced options

You can override the default hours per day, days per week, and weeks per year to match your own schedule — for example, a 4-day work week or 48 weeks of billable time per year. The formulas above stay the same; only the assumptions change.

Ready to try it? Go to the calculator, or see the FAQ for common questions about using the tool.