Modules
Every tool module, explained
DailyTools is organized into 11 focused modules — 122 free calculators and utilities that run privately in your browser. Explore each module below, read what it covers, and jump straight to the tools you need.
Health & Fitness
19 tools · Understand your body, one number at a time.
Health & Fitness Calculators
Track body composition, daily calories, macros, pregnancy milestones, and cardio training zones with free browser-based health calculators. Every result includes the formula used, WHO or clinical references where applicable, and links to related tools like BMI, body fat, and TDEE — so you can understand the number, not just see it.
- BMI CalculatorBody Mass Index from height and weight.
- Body Fat CalculatorEstimate body fat with the U.S. Navy method.
- Lean Body Mass CalculatorFat-free mass from height and weight.
- FFMI CalculatorFat-free mass index for athletes.
- Ideal Weight CalculatorReference weight ranges by height.
- BMR CalculatorBasal metabolic rate at rest.
Finance
16 tools · Money math made plain.
Personal Finance & Loan Calculators
Model mortgages, personal loans, compound interest, retirement savings, and debt payoff scenarios before you commit. Our finance tools show monthly payments, total interest, and amortization schedules with inputs you control — ideal for comparing offers, planning a budget, or stress-testing a major purchase.
- Mortgage CalculatorMonthly payment and total interest.
- Loan CalculatorPersonal loan payment estimate.
- Auto Loan CalculatorCar payment estimate.
- Payment CalculatorPayment from principal, rate and term.
- Amortization CalculatorFull loan amortization schedule.
- Compound Interest CalculatorGrowth with compounding.
Islamic Finance
8 tools · Zakat, riba-free math.
Islamic Finance & Zakat Calculators
Calculate Zakat on cash, gold, silver, business assets, and investments with dedicated tools for each asset class. Enter your own Nisab thresholds and market prices, see the 2.5% estimate, and cross-check with our general Zakat calculator — all processed privately in your browser with no account required.
- General Zakat CalculatorZakat on combined assets.
- Cash Zakat CalculatorZakat on cash holdings.
- Gold Zakat CalculatorZakat on gold you enter by weight.
- Silver Zakat CalculatorZakat on silver you enter by weight.
- Business Zakat CalculatorZakat on business assets.
- Investment Zakat CalculatorZakat on investments.
Math
7 tools · Everyday math, unstuck.
Everyday Math Calculators
Solve percentages, fractions, ratios, averages, and geometry problems in seconds. Whether you are checking a bill, scaling a recipe, or working through homework, each calculator shows clear steps and supports the kind of quick arithmetic people search for dozens of times a day.
Date & Time
6 tools · Time, decoded.
Date, Age & Time Calculators
Find exact age in years and days, count business days between dates, convert time zones, and decode Unix timestamps. These tools answer the date-and-time questions that come up in contracts, project planning, developer workflows, and everyday life — without opening a spreadsheet.
Education
5 tools · Grades and GPAs, sorted.
GPA & Education Calculators
Calculate weighted and unweighted GPA, plan the final-exam score you need, and track attendance rates. Built for students, teachers, and parents who want transparent grade math with no sign-up — paste your numbers, get the result, and move on.
Unit Converters
12 tools · Any unit, instantly.
Unit Converters
Convert length, weight, temperature, volume, area, speed, and more between metric and imperial systems instantly. Includes a manual currency converter for travel and side projects. Every conversion runs locally — useful when you need a quick answer without trusting a random converter site with your data.
Home & Construction
8 tools · Plan the build.
Home & Construction Calculators
Estimate concrete volume, paint coverage, tile quantities, flooring, and landscaping materials before you buy. These calculators help DIY renovators and contractors ballpark material needs from room dimensions — reducing waste and surprise trips to the hardware store.
Developer Tools
29 tools · Text and data utilities.
Developer & Data Tools
Format and validate JSON, encode Base64 and URLs, inspect JWTs, generate hashes, and compare text diffs — all without uploading sensitive config or API keys. A practical toolkit for developers who want fast utilities that respect privacy and work offline in the browser.
PDF Tools
10 tools · Work with PDFs privately.
PDF Tools — Merge, Split, Sign & Convert
Merge multiple PDFs, split pages, add a signature, convert Word or RTF to PDF, and export pages as images — entirely in your browser. No cloud upload, no account, no file retention. Ideal for one-off document tasks where privacy matters as much as speed.
- PDF ToolsMerge, split, sign and convert PDFs.
- PDF MergerCombine PDF files into one document.
- PDF SplitterSplit a PDF into individual page files.
- PDF SignerAdd a styled name or signature image to a PDF.
- PDF to Image ConverterConvert each PDF page to a PNG image.
- Image to PDF ConverterTurn multiple images into one PDF.
Image Tools
2 tools · Edit images privately.
Image Tools — Compress, Resize & Edit
Compress images for the web, resize to exact dimensions, and strip metadata before sharing. Every edit happens on your device, which makes these tools suitable for web publishing and social-media preparation without sending files to a server.