Free Online Tools
Welcome to Monocalc
Explore a comprehensive repository of tools (still growing 😀) across Finance, Calculators, Programming, and more. Designed to simplify your daily tasks—completely free. Share what you find useful!
Explore by Category
Browse 18 categories of free online tools
Charts/Graphs
Create stunning visual representations of your data with our free chart and graph tools. Build bar charts, line graphs, pie charts, and more directly in your browser — no software installation required.
2 tools
Chemistry
Explore chemistry calculations made easy. From the ideal gas law to molar mass conversions, our chemistry tools help students and professionals solve equations and understand chemical relationships quickly.
40 tools
Converter
Instantly convert between units of measurement across length, weight, temperature, volume, angle, and more. Our converters are accurate, fast, and work entirely in your browser with no sign-up needed.
22 tools
Date & Time
Work smarter with dates and times using our free utilities. Calculate age, find the difference between two dates, convert timestamps, compare timezones, and set up countdown timers — all in one place.
11 tools
Encode/Decode
Encode and decode data across popular formats including Base64, URL encoding, HTML entities, Morse code, and QR codes. Also compute cryptographic hashes like MD5, SHA-256, and many more.
31 tools
Finance
Take control of your financial decisions with our comprehensive finance tools. Calculate EMIs, SIP returns, compound interest, retirement savings, tax liabilities, and plan for major life goals with ease.
37 tools
Geography
Discover geographic insights with tools for country comparisons, size calculations, and distance measurements. Whether for research or curiosity, our geography tools make spatial data accessible.
12 tools
Geometry
Solve geometry problems instantly. Calculate area, perimeter, volume, and surface area for circles, triangles, rectangles, spheres, cones, cubes, and other shapes with step-by-step results.
15 tools
Health
Monitor and improve your wellbeing with our free health calculators. Compute BMI, estimate calorie needs, track body fat percentage, and use other evidence-based tools to support your health goals.
18 tools
Math
Tackle mathematical problems across algebra, statistics, number theory, and probability. Our math tools provide fast, accurate computations and clear explanations to help you learn and solve problems.
26 tools
Networking
Simplify network administration and troubleshooting with tools for IP lookup, subnet calculation, port reference, and IPv4/IPv6 address generation. Essential utilities for developers and sysadmins.
17 tools
Programming
Boost your development workflow with tools for code formatting, regex testing, color picking, JSON validation, and more. Practical developer utilities that save time and reduce errors in your projects.
20 tools
Random
Generate random values for testing, games, security, and daily decisions. Pick random numbers, passwords, UUIDs, words, dates, and more using cryptographically sound and easy-to-use generators.
16 tools
Text
Manipulate and analyze text with precision. Count words, convert letter case, find differences between texts, remove duplicates, sort lines, and perform dozens of other text operations in seconds.
25 tools
Media
Work with images, videos, and other media files directly in your browser. Our media tools help you process, convert, and analyze multimedia content without uploading to external servers.
1 tools
Others
A collection of handy utilities that don't fit neatly into one category. From everyday helpers to niche problem-solvers, explore a diverse set of tools designed to make your life a little easier.
4 tools
Physics
Solve physics problems across mechanics, thermodynamics, optics, and more. Our physics calculators guide you through the equations step by step, making complex concepts approachable for students and professionals.
27 tools
Social Media
Optimize your social media presence with tools for content creation, character counting, hashtag generation, and platform-specific formatting. Create engaging posts that stand out across every channel.
1 tools
Most Popular Tools
The most-used tools by our community
Recently Added
The latest tools added to our collection