Productive ToolboxGet in touch
Contact us
A real person reads every message. If you have found a calculation error, tell us — corrections from people who use these tools professionally are the fastest way the library gets better.
Send a message
Fill this in and it will open in your email app, ready to send.
Or email us directly
Email us
contact@productivetoolbox.comThis is the fastest route for anything urgent, and the right address for privacy, legal and advertising matters.
What to expect
- Response time
- We aim to reply within 2–3 business days.
- Languages
- English.
- Cost
- Support is free, like the tools.
Before you write
Common questions about pricing, accounts, accuracy and privacy are already answered on the home page and in our policies.
Topics
What people write to us about
Picking the right topic in the form helps us route your message and reply faster.
A tool gave a wrong result
The most useful message you can send us. Include the tool name, the exact values you entered, the result you got and the result you expected.
Request a new tool
We have 491 tools and add more regularly. Tell us the calculation you need and the field you work in.
Correct a formula or method
If a calculator uses the wrong standard, an outdated coefficient or an over-simplified model, we want to know. A reference makes it quicker to fix.
Advertising & business
Enquiries about advertising, partnerships or use of the site's content in your own product.
Privacy & data requests
Exercise a data right, ask a question about our Privacy Policy, or raise a concern about how the site handles information.
Legal & copyright
Copyright concerns, takedown requests, or questions about our Terms & Conditions.
Looking for a tool instead?
All 491 tools are free and open without an account.