Free online calculators & tools
Browse 65+ free tools by category—finance, health, developer utilities, writing helpers, and more. No signup; everything runs in your browser.
Browse by category
Each category has a dedicated hub with guides and every tool in that cluster.
Finance Tools
Loans, tax, investing, and money planning—built for real decisions
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Writing Tools
Word count, character limits, and text utilities for writers and SEO
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Daily Tools
Age, converters, and everyday helpers you actually use
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Developer Tools
JSON, encoding, Markdown, and utilities for builders
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Education Tools
GPA calculators and academic planning helpers for students
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Health Tools
BMI, calories, cycle tracking, and fitness calculators
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Legal Tools
Settlement and planning estimates—always with clear disclaimers
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Popular tools
Percentage Calculator
Calculate percentages, percentage change, and percentage of a total instantly.
Open PercentageAge Calculator
Find your exact age in years, months, days, hours, and minutes from your date of birth.
Open AgeEMI Calculator
Calculate your monthly loan EMI for home, car, or personal loans with full payment breakdown.
Open EMIMortgage Calculator
Estimate PITI-style monthly payments: principal & interest, taxes, insurance, HOA, and PMI with a conventional 78% LTV removal rule.
Open MortgageWord Counter
Count words, characters, sentences, and paragraphs instantly as you type. Includes reading time.
Open Word CountDiscount Calculator
Calculate sale price after discount, original price before discount, and savings amount instantly.
Open DiscountBMI Calculator
Compute Body Mass Index from height and weight using standard metric or US imperial formulas.
Open BMIJSON Formatter & Validator
Format, minify, and validate JSON in your browser—pretty-print with indentation or compress to a single line.
Open JSONNeed a full alphabetical list? View the sitemap.