Find answers to common questions about ProCalculator and how to get the most out of our tools.
Yes! ProCalculator is completely free to use. We don't charge any fees, require sign-ups, or display intrusive ads. Our mission is to provide accurate calculation tools to everyone. We offer 27 different calculators covering financial, health, math, date/time, and conversion categories.
Still have questions?
Contact our support team →Experience the difference with our precision-engineered calculators
Our calculators use verified formulas tested by certified experts. Every calculation is accurate to the highest precision.
Results in milliseconds. Our optimized algorithms deliver instant calculations without any lag or delay.
Desktop, tablet, or mobile. Our responsive design works perfectly on all devices and screen sizes.
No fees, no subscriptions, ever. Use all our calculators completely free, forever.
No data stored, calculations local only. Your privacy is our priority. All calculations happen in your browser.
👥
1M+
Active Users
🧮
100M+
Calculations
🌍
195
Countries
⚡
99.9%
Uptime