Calculate masks and network IP addresses without internet. Input IP and details to determine and range. Convert between decimal and CIDR notation. Export results as text or copy directly.
by John Rouda★ 2.423 ratingsUtilitiesFreeData updated 2026-09-08
Calculate the between two dates, add or subtract from a , and determine workdays. Track workdays added or subtracted. Perform calculations with an intuitive interface.
Perform -based calculations with addition, subtraction, multiplication, and division. Input and display in days, hours, minutes, and seconds. Customize format preferences. Convert between different units.
Perform complex calculations with 10 financial worksheets and 10 calculators. Switch between landscape and portrait modes. View results in decimal, fraction, or percentage formats. Save and recall previous calculations. Export data as text or PDF.
Calculate time values by adding, subtracting, and multiplying and . Input time values directly without converting to decimals. Display results in and format.
Secure internet browsing with encrypted connections. Mask IP address to hide online activity. Prevent DNS leaks for enhanced privacy. Improve connectivity speed and stability. Locate nearby servers for optimized performance.
Simulate disease spread via Bluetooth. Learn preventive measures like social distancing and mask use. Answer biology and public health quizzes. Collaborate with other players. Requires a simulation code to join.
Remote control multiple devices through a single . Manage IoT, vehicles, home automation, and access control. Customize scenarios and settings. Share device access and monitor activity in real time.
Study for A+, Network+, and Security+ exams with flashcards, practice quizzes, and detailed explanations. Track progress with customizable study plans. Access offline content and review key concepts anytime.
Solve mathematical problems with fraction, decimal, and equation input. Display results in decimal, rational, , or trigonometric formats. Support up to 16 decimal places for precise calculations.
Calculate in binary, hex, and decimal simultaneously
Convert numbers between binary, hexadecimal, and decimal bases. Display all three bases simultaneously. Switch input modes and see results in all bases. Perform arithmetic, logic, and bitwise operations. Support unsigned and 2’s complement numbers.
Monitor devices on a LAN by displaying their status with color indicators. Check device connectivity, identify issues, and view subnet details. Access a Telnet console for router management.
Manage and control Pi devices from an iPhone or iPad. Monitor system status, locate devices on the network, and perform actions without using SSH. Set up new devices, manage multiple systems, and access system logs and settings.