CL CalcLabHub

About CalcLabHub

CalcLabHub is a free, no-nonsense collection of online calculators and AI tools. Everything runs in your browser — no accounts, no installs, no data collection. We built it because we wanted fast, accurate tools that respect your privacy.

What we offer

Today we have 57+ tools across 7 categories:

  • Finance (20) — Mortgage, loan, auto loan, refinance, compound interest, ROI, retirement, savings, inflation, salary, credit card payoff, debt payoff, budget, emergency fund, rent vs buy, dividend, bond yield, APR, amortization, tip.
  • Math (6) — Percentage, scientific, fraction, age, date, random number.
  • Units (10) — General unit converter, temperature, data size, fuel economy, cooking volume, cooking weight, power, energy, pressure, torque, frequency, angle.
  • Converters (7) — Currency, number base, time zone, base64, color, plus the cooking variants.
  • AI Tools (6) — AI calculator, AI productivity tools, prompt generator, hashtag generator, email subject generator, sentence rewriter.
  • Text (4) — Word counter, case converter, character counter, and writing helpers.
  • Health (4) — BMI, calorie / TDEE, body fat, daily water intake.

Our principles

  • Free forever. Every tool, no paywall.
  • Privacy first. We don't collect, store, or sell your data.
  • Open & transparent. All formulas are documented in the FAQ sections.
  • Mobile friendly. Every tool works on phones.

How we make money

CalcLabHub is funded by unobtrusive advertising on tool pages, served through Google AdSense. We never gate tools behind a paywall or take sponsored placements for specific calculators. Ads keep every tool free for everyone.

Our policies

Plain-English pages that explain how the site works and what to expect from the tools:

  • Privacy Policy — what we collect (almost nothing) and how ads work.
  • Cookie Policy — the cookies set by us and by Google AdSense, plus how to opt out.
  • Disclaimer — the tools are educational, not professional advice.
  • Terms of Service — the rules for using the site.

Get in touch

Have a tool suggestion? Found a bug? Email us at our contact page.