About this site

Work out which pack size is genuinely cheaper, what an appliance adds to your electricity bill, or what a price leaves you after fees — without creating an account.

Every tool explains the basis of the calculation, what the result means and how it changes when your inputs change.

Everything is calculated in your browser. The numbers you type are never sent to a server and are not stored.

Pages are pre-rendered static documents, so using a calculator does not create a server request.

Where rules or rates apply — electricity tariffs, social insurance rates, minimum wage — the page states the date the figures were checked and what they are based on.

Where no official standard exists, such as portion sizes, the page says so plainly and lets you adjust the assumptions yourself.

This site does not recommend products or financial services, and it does not provide investment, tax or legal advice.

It also does not split a calculation across steps or hide results behind extra clicks in order to show more advertising.

If a result looks wrong or a figure is out of date, please tell us at fgart146@naver.com.

Suggestions for new calculators are welcome. Tools people use repeatedly are prioritised.