Add up cold rent, operating costs and heating into the warm rent, see the price per square metre, and check the rent-to-income ratio.
How to use the Rent Calculator
Enter your cold rent, operating costs and heating.
Add the living area, and optionally your net income.
See the warm rent, price per square metre and rent-to-income ratio.
This rent calculator combines the cold rent, cold operating costs and heating into the warm rent, the figure that actually matters for your monthly budget, and shows the price per square metre for both.
German rent is quoted in layers, which trips people up. The cold rent (Kaltmiete) is the rent for the flat alone; adding the operating costs (Nebenkosten) and heating gives the warm rent (Warmmiete), which is closer to what leaves your account each month.
If you enter your net household income, the calculator also shows the rent-to-income ratio with a simple traffic-light guide. A common guideline keeps warm rent at or below roughly 30 percent of net income, with above 40 percent generally seen as a high burden.
The price per square metre lets you compare flats of different sizes and judge whether a rent is in line with the local market. The tool shows it for both cold and warm rent.
It is worth knowing the deposit limit too: in Germany a landlord may ask for a security deposit (Kaution) of at most three months' cold rent, which you can budget for alongside the monthly cost.
It is a planning aid for renters and flat hunters, and everything runs in your browser, so the figures you enter stay on your device.
Frequently asked questions
Cold rent (Kaltmiete) is the rent for the flat alone. Warm rent (Warmmiete) adds operating costs and heating, so it is closer to what you actually pay each month.
A common guideline is to keep warm rent at or below roughly 30 % of net household income. Above 40 % is generally considered a high burden, though it depends on your other costs.
It lets you compare flats of different sizes and gauge whether a rent is in line with the local market. The tool shows both cold and warm rent per square metre.
No. Leave it at zero to just see the warm rent and price per square metre. Enter a net income to also see the rent-to-income ratio.
In Germany the security deposit (Kaution) is capped at three months' cold rent. It is paid once at the start and returned after you move out, less any justified deductions.
This tool is for general information only and is not financial, tax, or legal advice. Results are estimates that depend on your situation and current rules, so check the official source or a qualified professional before you act.
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