Weekly ↔ monthly rent calculator

What the result means

Australian rent is almost always advertised by the week. A calendar month is longer than four weeks, so multiplying weekly rent by four understates what you will actually pay over a year.

How it is calculated

Annual = amount × periods per year. Monthly = annual ÷ 12. Weekly = annual ÷ 52

• Periods per year: 52 weekly, 26 fortnightly, 12 monthly, 1 annual.

Every frequency is converted to an annual total, then divided into the other periods. That keeps weekly and monthly figures consistent instead of treating a month as four weeks.

Worked example

A $720 weekly rent

A two-bedroom is advertised at $720 per week.

Annual

$720 × 52 = $37,440

Monthly

$37,440 ÷ 12 = $3,120

Wrong shortcut

$720 × 4 = $2,880, which is $240/month too low

Budget $3,120 a month, not $2,880, if rent is due on a monthly cycle.

Why weekly × 4 is wrong

There are 52 weeks in a year and 12 months. Four weeks is 48 weeks, which leaves four weeks of rent unaccounted for. The annualised conversion is weekly × 52 ÷ 12, which is weekly × 4.333…

Property managers who collect monthly rent typically use this annualised figure. A $700 week is $36,400 a year and $3,033.33 a month — not $2,800.

Bonds and advertising

Residential bonds are usually expressed in weeks of rent. Convert to an annual figure first if you need a monthly budget that includes rent, then add other household costs separately. This calculator does not estimate bond, water or strata.

Questions