All Tools
Explore our entire collection of free online tools. Search by name or filter by category to find exactly what you need.
Browse tools by category
Every NerdyTools calculator and converter is free, runs instantly in your browser, and needs no sign-up. Tools are grouped into focused categories so you can move from a quick calculation to the related tools around it: a mortgage estimate leads naturally to loan comparisons and tax checks, a BMI result to calorie and macro planning, a word count to readability and reading time. Start from the category that matches your task, or search the full index above.
Finance & Money CalculatorsCalculate loans, investments, taxes, and manage your personal finances with precision.Health & Fitness CalculatorsTrack your health metrics, calculate calories, BMI, and plan your fitness journey.Math & Algebra CalculatorsSolve percentages, fractions, algebra, statistics, and geometry with focused calculators that show the underlying result.Unit & Currency ConvertersConvert measurement units, number formats, temperatures, and supported currency values with dedicated conversion tools.Date & Time ToolsCalculate date differences, plan events, and convert between time zones effortlessly.Home & Construction CalculatorsEstimate materials, plan renovations, and calculate construction costs for your projects.Automotive CalculatorsCalculate fuel costs, compare vehicles, and estimate auto loans and leases.Text & Writing ToolsCount and analyze text, change letter case, estimate reading time, and prepare text for specific formats.Image ToolsEdit, compress, convert colors, and generate assets for your visual projects.Web & Developer ToolsFormat code, encode data, generate passwords, and streamline your web development workflow.Islamic & Cultural ToolsCalculate Zakat, convert Hijri dates, and determine Islamic inheritance easily.Business & Marketing ToolsCalculate ARR, MRR, churn, ad frequency and the metrics that run a modern business.AI & Productivity ToolsEstimate AI costs, count tokens, compare models, and boost your productivity.