Free Online Tools and Calculators
Explore practical online calculators, generators, converters, writing tools, research utilities, business tools, finance calculators, image tools, technology utilities, and productivity resources.
170 tools available across 10 categories.
Mathematical Calculators
Mathematical calculators for algebra, calculus, fractions, matrices, exponents, logarithms, trigonometry, and more.
Combination Calculator
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Derivative Calculator
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Equation Solver
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Exponent Calculator
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Factorial Calculator
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Fraction Calculator
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Integral Calculator
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Logarithm Calculator
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Matrix Calculator
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Percentage Calculator
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Permutation Calculator
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Quadratic Equation Calculator
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Scientific Calculator
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Trigonometry Calculator
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Unit Circle Calculator
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Finance Calculators
Financial calculators for interest, loans, financial planning, business decisions, and money-related analysis.
Business Calculators
Business calculators for profitability, break-even analysis, margins, planning, and decision-making.
Investment Calculators
Tools for evaluating investment returns, growth, profitability, and investment-related decisions.
Writing Tools
Writing, academic, citation, research, editing, readability, text analysis, and content-generation tools.
Abstract Word Counter
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Academic Outline Generator
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Academic Title Generator
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Acronym Abbreviation Generator
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AMA Citation Generator
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APA Citation Generator
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APA Format Checker
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APA In Text Citation Generator
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APA Reference Generator
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APA Reference List Formatter
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APA Running Head Generator
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APA Title Page Generator
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Bibliography Generator
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Blog Post Outline Generator
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Business Plan Outline Generator
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Business Proposal Outline Generator
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Character Counter
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Chicago Bibliography Generator
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Chicago Citation Generator
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Chicago Endnote Generator
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Chicago Footnote Generator
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Citation Format Comparator
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Citation Formatter
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Citation Generator
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Citation Order Checker
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Citation Source Type Selector
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Citation Style Converter
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Clarity Checker
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Conciseness Checker
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Confidence Interval Calculator
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Consistency Checker
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Content Brief Generator
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Correlation Calculator
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Document Outline Generator
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DOI To Citation Generator
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Duplicate Word Checker
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Essay Outline Generator
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Essay Word Counter
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Executive Summary Generator
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Filler Word Checker
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Grammar Checker
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Harvard Citation Generator
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Harvard In Text Citation Generator
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Harvard Reference Generator
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Harvard Reference List Formatter
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Headline Analyzer
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Hypothesis Generator
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IEEE Citation Generator
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IEEE Numbered Citation Generator
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IEEE Reference Generator
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ISBN To Citation Generator
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Jargon Checker
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Job Description Generator
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Keyword Density Checker
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Legal Case Citation Generator
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Legal Footnote Generator
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Legislation Citation Generator
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Literature Review Outline Generator
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Margin Of Error Calculator
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Mean Median Mode Calculator
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Meeting Minutes Formatter
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Meta Description Length Checker
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Missing Citation Checker
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MLA Citation Generator
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MLA Format Checker
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MLA In Text Citation Generator
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MLA Works Cited Generator
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Oscola Citation Generator
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Paragraph Analyzer
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Paragraph Length Checker
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Paraphrasing Assistant
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Passive Voice Checker
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Problem Statement Generator
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Project Charter Generator
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Project Proposal Outline Generator
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Punctuation Checker
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Readability Checker
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Reading Time Calculator
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Reference Completeness Checker
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Reference List Formatter
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Reference List Generator
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Repeated Phrase Checker
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Report Outline Generator
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Research Design Selector
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Research Methodology Helper
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Research Objectives Generator
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Research Proposal Outline Generator
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Research Question Generator
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Resume Summary Generator
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Risk Register Generator
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Sample Size Calculator
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Scope Of Work Generator
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Sentence Combiner
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Sentence Length Checker
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Sentence Rewriter
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Sentence Splitter
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Sentence Variety Checker
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SEO Title Length Checker
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Standard Deviation Calculator
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Statement Of Work Generator
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SWOT Analysis Generator
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Text Case Converter
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Text Cleaner
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Text Compare
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Text Summarizer
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Thesis Statement Generator
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Tone Checker
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Transition Word Finder
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Transition Words Checker
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URL to Citation Generator
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Vague Word Checker
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Vancouver Citation Generator
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Vancouver Reference Generator
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Word Choice Improver
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Word Counter
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Word Frequency Counter
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Wordiness Checker
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Writing Flow Checker
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Writing Goal Calculator
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Writing Style Analyzer
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Writing Time Calculator
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Z Score Calculator
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Image & File Tools
Tools for image dimensions, file sizes, compression, conversion, cropping, resolution, and common image formats.
Aspect Ratio Calculator
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DPI Calculator
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File Size Calculator
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File Size Converter
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Image Compressor
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Image Converter
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Image Cropper
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Image Resizer
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Image Resolution Calculator
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Image Size Calculator
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JPG to PNG Converter
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PNG to JPG Converter
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WebP Converter
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WebP to JPG Converter
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WebP to PNG Converter
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Zip Size Calculator
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Code Generators
Generate useful codes and machine-readable formats for websites, documents, products, and digital workflows.
Time & Date Tools
Clocks, timers, countdowns, time-zone tools, working-day calculations, and other time utilities.
Date & Time Calculators
Calculators and utilities for dates, durations, ages, and time-related calculations.
Unit Converters.astro
Useful online tools and calculators for unit converters.astro.
Need professional help?
If you need assistance beyond the tools, explore Lamtas professional services for technology, documents and content, research, business, finance, creative work, marketing, and other professional needs.