Reporting a wrong result
This is the message we most want. To let us reproduce and fix it quickly, please include:
- The instrument (its name, or the page link).
- The exact inputs you entered, and which units you used.
- The figure the page showed, and the figure you expected.
- Where your expected figure comes from, if you have a source.
The fastest way to send all of that at once is to press Copy link on the instrument — the resulting URL carries your inputs — and paste it into your message.
Requesting an instrument
Thousands of calculators are already catalogued and queued, and we build them in batches by series. If something you need is missing or badly served elsewhere, tell us what you would compute and why — real use cases move things up the queue.
How to reach us
Email: hello@solvetutor.com
We read everything. We cannot promise individual replies to general questions, but corrections are always looked at — and when one is confirmed, the fix ships with the next build and the instrument's revision letter advances.
What we cannot help with
We are not able to give medical, financial, legal or tax advice, or to interpret what a result means for your particular circumstances. The instruments show arithmetic and cite their sources; decisions that depend on your specific situation belong with a professional who can see the whole picture.