Calculate · Understand · Compare · Decide
Clear answers for everyday decisions.
Fast, private calculators and developer tools for health, money, study, work and everyday life.
Frequently used
PDF Signer
Add a styled name or signature image to a PDF.
BMI Calculator
Body Mass Index from height and weight.
Mortgage Calculator
Monthly payment and total interest.
Percentage Calculator
Find percentages and changes.
Age Calculator
Exact age from date of birth.
Compound Interest Calculator
Growth with compounding.
Unix Timestamp Converter
Unix time to readable date.
Free online tools for everyday decisions
DailyTools provides clear answers for everyday decisions with free calculators and browser-based utilities. Use the library to check a BMI, estimate a mortgage payment, calculate Zakat, convert measurements, format JSON, sign a PDF, or prepare an image without creating an account.
Each tool is built for one practical task. Health and finance calculators show the assumptions behind their results; Islamic finance tools help with arithmetic while leaving religious guidance to qualified local authorities. PDF, image, and developer tools process selected files or text on your device rather than uploading them for tool processing.
Start with a category when you know the kind of question you need to solve, or browse the full library to compare related tools. We include worked examples, limitations, and relevant sources where they help you understand an output before you act on it.
Browse by category
AI Tools
Build, budget, and optimize privately.
Health & Fitness
Understand your body, one number at a time.
Animal Care & Farm
Care and plan with confidence.
Finance
Money math made plain.
Islamic Finance
Zakat, riba-free math.
Math
Everyday math, unstuck.
Date & Time
Time, decoded.
Education
Grades and GPAs, sorted.
Unit Converters
Any unit, instantly.
Home & Construction
Plan the build.
Developer Tools
Text and data utilities.
PDF Tools
Work with PDFs privately.
Image Tools
Edit images privately.
Chemistry
Stoichiometry, solutions, and gas laws.
Physics
Motion, force, energy, and waves.
Statistics
Data, probability, and inference.
Earth & Weather
Coordinates, climate, and sky.
Food & Cooking
Recipes, conversions, and party planning.
Fresh additions
What’s new
Explore the latest calculators and browser tools added to DailyTools.
Meal Prep Calculator
Portions and batches for meal prep.
Ingredient Substitution Calculator
Convert substitute amounts.
Recipe Scaling Calculator
Scale any ingredient amount.
Food Storage Calculator
Estimated safe storage duration.
Sulfur Calculator
SO₂ additions for winemaking.
Bread Spread Calculator
Butter or spread for servings.
New AI tool
AI Token Counter
Count estimated tokens, characters, words, sentences, and timing for leading AI models.
New AI tool
AI Cost Calculator
Estimate input, output, daily, and monthly API costs from your prompt.
New AI tool
Context Window Calculator
See how much of each model’s context window your prompt uses.