Calc tools — 18 free, in your browser
Math, scientific, financial, and engineering calculators with full math transparency and decimal-precise arithmetic.
Most popular
All calc tools
Age Calculator
Calculate exact age — years, months, days, hours, and minutes.
BMI Calculator
Body Mass Index with category and healthy weight range.
Loan Calculator
Monthly payment, total interest, and amortization for any loan.
Tip Calculator
Bill, tip percent, and how many people — get the per-person total.
Temperature Converter
Celsius, Fahrenheit, Kelvin, Rankine — convert any to all.
Power Calculator
Voltage, current, resistance, power — solve any two for the rest.
Hex Calculator
Convert between binary, octal, decimal, and hexadecimal.
Binary Calculator
Add, subtract, AND, OR, XOR, shift — binary arithmetic & logic.
Date Difference
How many days, weeks, months between any two dates?
Time Calculator
Add or subtract durations — hours, minutes, seconds.
Matrix Calculator
Multiply, invert, transpose, determinant — works for any square or rectangular matrix.
Derivative Calculator
Symbolic differentiation with step-by-step output — single or multi-variable.
Integral Calculator
Definite integration via numerical methods — fast and accurate for any continuous function.
Equation Solver
Solve linear systems, polynomial roots, and single-variable equations.
LaTeX Renderer
Live-render math from plain text or LaTeX — copy code or a clean PNG.
Basic Calculator
A fast everyday calculator — click or type, full keyboard support.
Scientific Calculator
Trig, logs, powers, roots, factorial — degrees or radians.
What people do with the calc tools
- ·Compute compound interest, loan amortization, ROI
- ·Solve algebra, trigonometry, calculus with shown steps
- ·Compute matrix operations, derivatives, integrals
- ·Convert between number bases and units
- ·Evaluate scientific expressions with constants
Why Xonvert Calc
Compared with TI-84, Wolfram Alpha lite, calculator.com, Xonvert's calc tools trade install, license, and account for a URL. Free, private, fast, and offline-capable once loaded. The depth a desktop tool offers, with none of the friction.
Frequently asked questions
Are the Xonvert Calc tools free?+
Yes — every tool is free. No signup, no credit card, no trial limits. Pro removes the small export watermark on free tools and lifts daily quotas on the heaviest operations.
Do my files leave my device?+
No. The Calc tools run entirely in your browser. Your files are processed locally and never reach our servers.
Do they work offline?+
Yes — once a tool page is loaded, the browser caches its code and the tool keeps working without internet.
Do they work on mobile?+
Yes. Every calc tool works in modern mobile browsers on Android and iOS without an app install.
Can I use these for commercial work?+
Yes, with no licensing fees. We don't claim rights to anything you produce.