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Have a suggestion for a new calculator? Found an issue? Want to discuss engineering methodology? Every message is read and responded to personally.

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Good to know

Before you write

  • Response typically within 1–2 business days
  • Every message read personally by the founder
  • Calculator suggestions are especially welcome
  • No automated replies — real answers only

Reporting a formula error? Include the input values you used, the result you received, and what the correct result should be.
Suggesting a new calculator? Tell us the engineering problem you need to solve and which sector it relates to.
Methodology question? Reference the specific calculator and the step or formula you want to discuss.

What happens after you send a message

1

Received instantly

Your message arrives directly in the founder's inbox — no ticket system, no filters.

2

Read personally

Every message is read by the engineer who built this platform, not a support team.

3

Answered directly

You receive a real, specific response — typically within 1–2 business days.

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