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Weekly to Monthly Rent Conversion: The Right Way to Calculate

Avoid the common "× 4" mistake.

Weekly to Monthly Rent Conversion: The Right Way to Calculate Residential Property Services in London

Updated October 2026 · Fraser Bond

Renting · Rent maths

Weekly ↔ monthly rent

× 52 ÷ 12weekly to monthly
× 12 ÷ 52monthly to weekly
Deposits5 weeks
Calculatorinstant
In short: To convert weekly rent to monthly, multiply by 52 and divide by 12, not by 4, because a month is on average about 4.33 weeks. To convert monthly to weekly, multiply by 12 and divide by 52. Getting this right matters for budgeting and for deposit caps, which are set in weeks of rent (usually up to five weeks). Use the calculator below.
Rent converter
Weekly → monthly–
Monthly → weekly–
5-week deposit on monthly rent–

Deposits are capped at 5 weeks' rent where annual rent is under £50,000.

Frequently asked questions

Why not multiply weekly rent by 4?

Because a month is about 4.33 weeks; ×4 underestimates.

How is a 5-week deposit calculated?

Monthly rent × 12 ÷ 52 × 5.

Does Fraser Bond quote monthly?

Yes, with weekly equivalents.

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