Contact Us

Got a question, found a bug, or have an idea for a calculator we should add? Send a message using the form below and it will land straight in our inbox. We read everything and try to reply within a couple of days.

We will only use your email address to reply to you. See our privacy policy for details.

Before you write

A few details make it much easier for us to help. If you found a mistake in a calculator, tell us which page you were on, what you typed in and what result you expected. A screenshot description or the exact numbers are enough. If you are suggesting a new calculator, tell us who would use it and what question it should answer, because that helps us decide what to build first.

What we can and cannot help with

We can fix errors in our tools, explain how a result was calculated and take suggestions for new calculators and guides. We cannot give personal financial, tax, legal or medical advice, and we cannot check the details of your own contract or tax return. For those, a qualified professional is the right person to ask. Our calculators and guides are general information.

Your privacy

We only use the details you send to answer your message. We do not add you to a mailing list, and the numbers you enter in our calculators stay in your browser. You can read more in our privacy policy.

Em português

Podes escrever-nos em português. Se encontraste um erro numa calculadora, diz-nos em que página estavas, que valores introduziste e que resultado esperavas. Se tens uma sugestão de calculadora ou de guia, conta-nos para que serve e a quem ajudaria. Não damos aconselhamento financeiro, fiscal, jurídico ou médico personalizado: para isso, fala com um profissional qualificado.