34 Free Life & Business Tools

Free online tools including loan calculator, age calculator, BMI calculator, calendar, household budget, and password generator to help with daily life and work.

Our Life & Business category offers practical tools for daily living and work. The loan calculator lets you simulate monthly repayment for mortgages and auto loans. The age calculator determines your exact age from your birth date in both traditional and Western calendars. BMI and basal metabolic rate calculators support health management, while electricity cost and savings simulators help with household finances. The password generator instantly creates highly secure random passwords. Productivity tools include to-do lists, Pomodoro timers, and habit trackers.

📐
unit conversion
Conversion of length/weight/temperature/area/volume/velocity/data.
calculation
🎂
age calculator
Calculates exact age, number of days, zodiac sign, and zodiac sign from date of birth.
calculation
⚖️
BMI Calculator
Calculates BMI value from height and weight. Judgment and standard weight display.
health
⏱️
stopwatch
Stopwatch with lap time measurement.
Hours.
🎰
Lottery and Roulette
Roulette draw. Weighting and grouping support.
random
🎲
dice
Multi-sided die support. Dice type input and history display.
random
Electricity bill calculator
Calculates electricity bills based on the power consumption of home appliances. Comparison function included.
calculation
📐
Unit conversion (extended version)
Conversion of area/volume/velocity/data volume/pressure/fuel consumption, etc.
calculation
📊
Barcode Generator
Generates barcodes such as CODE128/EAN-13, etc. PNG/SVG compatible.
generation
💰
Annual take-home pay calculation
Automatic calculation of take-home pay based on annual income. Displays a breakdown of company insurance and taxes.
calculation
🍱
Calorie Calculation
Calories and PFC are calculated using a database of Japanese-centric foods.
health
👕
Clothing and shoe size conversion
Easy conversion between Japanese, US, EU and UK clothing and shoe sizes.
everyday
📄
Paper Size List
List of A-format, B-format, and special sizes, with pixel counts calculated by DPI specification.
everyday
🧠
MBTI Personality Test
Diagnose 16 types in 60 questions
Diagnose
🍽️
Meal Balance Checker
Record meals from a database of 100+ Japanese foods and get AI-style analysis of calories, macronutrient balance, and nutrients. Radar chart...
living
🔮
AI Fortune Teller
AI fortune teller that reveals your fortune based on name, birth date, and blood type. Get insights on overall luck, romance, career, finances, and health displayed on radar charts...
living
Name Generator
AI-powered automatic name generation. Create pet names, company names, project names, character names, and more based on category and theme...
living
🕐
Analog Clock
Display a beautiful analog clock in your browser. Multiple design themes, full-screen support. Free, no registration required.
living
⚖️
Body Fat Calculator
Calculate body fat percentage using both US Navy formula and BMI-based methods. Visual bar display of body composition, category judgment, age and gender comparisons...
living
🧘
Breathing Exercise
3 types of guided breathing exercises: 4-7-8 breathing, box breathing, and relaxation breathing. Visual guidance with animations...
living
🧭
Web Compass
Online compass that displays direction in real-time using your smartphone's compass sensor. Bearing display, 8-direction compass, night mode...
living
🍳
Cooking Measurement Converter
Accurately convert between tablespoons, teaspoons, cups, ml, and grams for different ingredients. Free cooking measurement tool supporting 30+ ingredients like sugar, salt, and flour...
living
❤️
Heart Rate Zone Calculator
Calculate maximum heart rate and 5 training zones based on age. Color-coded display of fat-burning, aerobic, and anaerobic zones. Supports Karvonen formula...
living
🖱️
Mouse Sensitivity Converter - Unify sensitivity across games
Convert mouse sensitivity across 20+ games including CS2, Valorant, Apex, Overwatch 2, and more. cm/360°...
living
⚗️
Periodic Table
Interactive periodic table. Detailed information on all 118 elements (atomic number, symbol, Japanese/English names, atomic weight, electron configuration, classification, state at room temperature...
living
🧍
Posture Reminder
Send posture improvement reminders at custom intervals. Includes posture correction tips and stretch suggestions during desk work. Browser notifications, sound alerts...
living
📐
Protractor Tool
SVG protractor for measuring angles on screen. Freely adjust angles by dragging, snap feature, 360° mode, presets...
living
🏃
Running Pace Calculator
3-way running calculator for distance, time, and pace. Supports 5K, 10K, half marathon, and full marathon. Split time table, pace conversion...
living
📊
Scoreboard
Sports and gaming scoreboard. Supports 2 teams, full-screen display, count-up and count-down timer...
living
📏
Screen Ruler
Browser-based ruler tool. Supports px, cm, and inch units. Measure distances by clicking and dragging. Use credit card...
living
😴
Sleep Calculator
Calculate optimal sleep and wake times based on sleep cycles (90-minute intervals). Work backward to find the best time to wake refreshed for quality sleep...
living
🔊
Sound Level Meter
Online sound level meter that measures decibels in real-time from your microphone. Graph display, color-coded levels, max/min/average...
living
🔢
Counter
Online counter that counts by tapping or clicking. Supports multiple counters. Useful for inventory management and traffic surveys. Keyboard shortcuts...
living
💪
Workout Timer
Workout timer supporting HIIT, Tabata, and custom intervals. Color-coded work/rest periods, voice alerts, full-screen...
living

What is Life & Business Tools?

The Life & Business Tools collection comprises practical calculators and planning utilities designed to support everyday financial and personal decisions. Unlike theoretical tools, this suite focuses on real-world applications—calculating loan payments when considering major purchases, tracking body metrics for health awareness, managing household budgets, and generating secure passwords. These tools eliminate uncertainty about complex calculations while providing context to help you understand what the numbers mean for your actual situation. Whether planning retirement, evaluating purchases, or simply organizing personal finances, these resources give you data-driven clarity.

How to Use

Browse the available tools and select the one matching your immediate need. Each calculator accepts straightforward inputs without requiring financial or technical expertise. After entering your information, results appear instantly with explanations of what the calculations represent. Many tools offer additional context—for example, showing how loan payments change with different interest rates, or interpreting BMI results within health guidelines. Review results carefully and bookmark useful tools for future reference, as many require periodic recalculation as circumstances change.

Use Cases

Real-world applications include:
• Determine affordability before committing to mortgages or vehicle loans
• Track household spending patterns to identify areas for savings
• Monitor health metrics like BMI over time as part of wellness planning
• Create strong, unique passwords for different online accounts and services
• Calculate age gaps and verify dates for planning family events
• Estimate calorie requirements when beginning fitness or nutrition programs
• Plan utility expenses and household budgets for monthly financial management

Tips & Insights

These calculators work best as components of broader life planning rather than isolated tools. Financial calculators often assume standard conditions—actual results may vary significantly based on additional fees, variable rates, or personal circumstances. Review results periodically when major life changes occur: new job, home purchase, health status shifts. Combine multiple tools for comprehensive planning: calculate loan affordability, then integrate that into household budget planning. Keep screenshots or records of important calculations for future reference and comparison.

Frequently Asked Questions

Are the loan calculation results accurate?

We perform standard amortization calculations. Actual repayment amounts may vary based on your financial institution's terms.

Where is household budget data saved?

Data is saved in your browser's localStorage, so it will be restored when you visit again in the same browser. No data is sent to servers.

Is password generation secure?

Yes. We use a cryptographically secure random number generator, and generated passwords are never sent externally.

Are these tools available offline?

Most tools work completely offline once the page loads, as they use pure JavaScript calculations without server calls. Some advanced features might require internet, but basic calculations function without connection.

Can I download or export my calculations?

Most tools allow you to copy results to clipboard or print results directly from your browser. For detailed tracking like household budgets, check if the individual tool offers export or save features.

Which calculators are most accurate for financial planning?

The loan calculator uses standard financial formulas and is accurate for basic scenarios, but it doesn't account for fees or variable interest rates. For complex financial planning, consider consulting a financial advisor for personalized advice.

Can I use these tools on mobile phones?

Yes, all tools are responsive and work on smartphones, tablets, and desktops. The interface adjusts automatically to your screen size for optimal usability.

What units do the calculators use?

Different tools use different units—BMI uses metric (kg/cm) and imperial (lbs/inches), age calculator uses years, and loan calculator uses currency amounts. Check each tool's interface for unit specifications and conversion options.

Are my personal data inputs tracked or logged?

No, all data entered into these tools stays in your browser and is never sent to servers. Your privacy is fully protected as calculations happen entirely on your device.

Subcategories

Other Categories