Recommend a good mortgage calculator?

[VintageRainBoots]

Could someone please recommend a good mortgage calculator? I'd like to get an idea of what we could afford to buy.

In the U.S. (where we're from), the convention is that you put down a 10-20% deposit ("down payment") and finance the rest with a 15 or 30 year fixed-rate mortgage. Oh, and the house price shouldn't exceed about 3.5 times your annual income. Is this similar to how it's done in the U.K.?

A 10% deposit is regarded as the minimum. There are a variety of mortgage products on the market that can be either fixed or variable rate (or fixed for a few years before reverting to a variable rate) and over a shorter or longer term. Fixed rate mortgages often come with penalties for early redemption. Ratio to income is less important at the moment than whether you can afford the repayments. Banks are more concerned about your disposable than your gross. Recommend looking for a good independent mortgage advisor to assist in filtering out the best products for you.

The BBC Mortgage Calculator won't try to sell you anything.

The usual term is 25 years here, though you can get shorter mortgages though.
Our sytsem sounds very similar to yours though.

Thanks for the recommendation, Cogito. We already have the 10-20% deposit saved, but we're unsure what our disposable income will be until we've been in the UK a while.