About Calculator Caddy
Calculator Caddy is an independent website that provides free, accurate, easy-to-use online calculators for the numbers people deal with in real life — mortgages and loans, health metrics, construction and trade estimates, unit conversions, and everyday math.
We started Calculator Caddy with a simple frustration in mind: most "calculator" pages online are buried under pop-ups, force you to sign up, or hide the actual math. We wanted the opposite — a fast tool that gives you the answer, shows you the formula behind it, and respects your privacy.
Who's behind it
Calculator Caddy is built and maintained by Luke Modrow, based in Green Bay, Wisconsin. It's a small, independent project — not a faceless content farm. Every calculator is added by hand, tested against known values, and paired with a plain-English explanation of how the math works.
How our calculators are built and verified
- Standard, published formulas. Each tool uses well-established formulas — standard loan amortization for finance tools, recognized health equations for BMI and calorie needs, and standard networking math for the IP subnet tool. Where helpful, the formula is shown right on the page so you can check our work.
- Tested with real examples. Every calculator is validated against worked examples before it goes live.
- Reviewed and updated. We revisit tools regularly to fix edge cases and keep them accurate.
What makes Calculator Caddy different
- No sign-up, ever. You never need an account to use any tool.
- Private by design. Calculations run entirely in your browser. We don't store the numbers you enter.
- The math is transparent. We explain how each result is reached, so you can trust — and learn from — the answer.
- Works everywhere. Every calculator is mobile-friendly and free.
Our mission
To be the most trustworthy, no-nonsense place on the web to run a quick calculation — and to actually explain the answer, not just spit out a number.
Have a calculator you wish existed? Browse all calculators or contact us — we read every message.