Need help or have a tool idea?
Send us bug reports, tool requests, formula feedback, resource suggestions, partnership questions, or general messages. We read every message and use feedback to improve InstaCalculate.
We’re building a broader numerical tool library.
Your suggestions help us decide what to build next, which formulas or methods to double-check, and how to make calculators and interactive tools easier to use.
- Best for
- Tool ideas, bugs, formula feedback, and resource suggestions
- Response time
- Usually within 2 business days
Please include the tool name, the values or data you entered, the result you expected, and any source you used. This helps us review faster.
Email InstaCalculate
Email us directly for tool ideas, bug reports, formula feedback, resource suggestions, partnership questions, or general messages.
hello@instacalculate.comSuggest a tool
Tell us what check, calculation, conversion, solver, analyzer, generator, or reference would save you time.
Report a bug
Share the page, device, browser, and what happened so we can reproduce and fix it.
Formula feedback
If a result looks wrong, send the input values or data and the formula, method, or source you expect us to use.