Frequently Asked Questions
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Frequently Asked Questions
Is Online Rekenmachine really free?
Yes, all of our calculators are completely free to use and require no account.
Do I need to register?
No, you can start calculating immediately without creating an account.
Is my input data stored?
No, all calculations happen locally in your browser. See our Privacy Policy for details.
What languages is the site available in?
Dutch, English, German, French, Italian, Swedish, Norwegian and Danish.
How accurate are the calculators?
Every formula is tested against known reference values, but results are indicative โ see our Disclaimer.