Practical tools. Clearer decisions.

CalcUK brings everyday calculations into one place, with the figures and assumptions visible.

Understand a payslip, compare loan repayments, plan a project or explore your savings. Each tool includes a worked example, a breakdown and sources you can check.

UK and international tools

The country, currency and applicable period appear on each calculator. Choose the tool that matches your circumstances before entering your figures.

Independent and free to use

This site is independent of HMRC, the NHS, banks and the other organisations referenced in its sources. The tools are free and require no account. They do not arrange credit, take payments, submit forms or issue official decisions.

Get in touch

For questions or corrections, contact rubo8k@gmail.com. You can also read how we calculate or browse the tools.