How this calculator works
Converts using 365 days, 52 weeks and 12 months a year, so a weekly amount × 52 ÷ 12 is the true monthly figure (not × 4).
- Yearly = daily × 365, weekly × 52, or monthly × 12.
- Monthly = yearly ÷ 12. Weekly = yearly ÷ 52. Daily = yearly ÷ 365.
Worked example
With these inputs: amount $45; per Week.
The result is per year $2,340.00, with per month $195.00 and per week $45.00.
The ×4 mistake
A month is about 4.33 weeks, not 4. Budgeting a $100 weekly grocery spend as $400 a month leaves you about $33 short every month, or about $400 a year. That's one whole extra month of groceries.
Everyday examples
A $5 daily coffee is about $152 a month and $1,825 a year. A $45 weekly takeaway is $195 a month and $2,340 a year. A $600 yearly insurance premium is $50 a month to set aside.
Frequently asked questions
How do I convert weekly to monthly?
Multiply by 52 and divide by 12, or multiply by about 4.33.
How do I convert a yearly bill to a monthly amount?
Divide by 12. Setting that amount aside each month means the yearly bill is already covered when it arrives.
How many days are in a year for budgeting?
This calculator uses 365. Leap years add a day, which barely changes a daily figure.