Frequently Asked Questions
How the tools work, what they store and where their limits begin.
Are the calculators free?
Yes. They run in a standard browser and no account is required.
Do you store the values I enter?
Calculator JavaScript is designed to process values locally in your browser and does not intentionally submit them to this site. Ordinary hosting and advertising technologies are described in the Privacy Policy.
Which currency should I use?
Use the currency that applies to your situation. Financial results generally use generic currency units.
Can I mix metric and imperial units?
Only when the formula explicitly allows it. Keep area, volume, energy and rate units consistent.
Are the results professional advice?
No. Results are preliminary planning estimates and do not replace qualified professional advice or local requirements.
Why do calculators ask me for rates?
Utility prices, productivity, labour costs and service levels vary. User inputs avoid misleading universal assumptions.
Can I use the tools for budgeting?
Yes, as scenario and early-stage planning aids. Record assumptions and verify important figures before committing money.
How are errors handled?
Use the limited-purpose contact page and identify the exact page and issue.