Contact

A question, a mistake in a calculation, an idea for a new tool or a partnership request? Write to us:

contact@hod-group.com

Reporting a mistake

Tell us the tool's name, the values you entered and the result you expected. The easiest way: use the tool's "Share" button and paste the link into your email, it contains all your values.

Press, blogs and partner sites

You can embed our calculators on your site for free: see Embed our tools.

Publisher: HOD Group, Belgium. We usually reply within 2 working days.