About MegaCalc
Free online converters and calculators — no signup, no ads interrupting your work, instant results.
What is MegaCalc?
MegaCalc is a free, fast, and comprehensive online unit converter and calculator. We cover length, weight, temperature, speed, volume, area, time, data storage, energy, pressure, currency, and dozens more categories — with over 3,000 individual conversion pairs.
Our Principles
- Free forever — All tools on MegaCalc are completely free to use. No paywalls, no subscriptions.
- No signup required — Use any converter or calculator instantly, with no account or login needed.
- Instant results — Conversions update in real time as you type — no need to press a button.
- Accurate — Our conversion factors are sourced from official international standards (SI, NIST, and others).
- Privacy-first — We do not track individual searches or sell your data. See our Privacy Policy for details.
What We Offer
3,000+
Conversion pairs
24+
Unit categories
12+
Calculators
0
Signups required
Contact
Have a suggestion, found a bug, or want to request a new converter or calculator? We welcome feedback. Reach out via the contact information in our footer.