Business Tip Calculator with Tax
Calculate total bill including tax and tip for business dining. Split the bill among multiple people easily.
Quick Tips
계산 분할
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BMI Percentile Calculator for Kids & Teens - Childhood BMI Calculator
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BMI Category Calculator - Body Mass Index Classification
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Breathing Timer - Box Breathing & 4-7-8 Breathing Exercise Guide
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Budget Calculator - Personal Finance Planner
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Calorie Calculator - TDEE & Macros
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Carbon Footprint Calculator - CO2 Emissions Calculator
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Coffee Brewing Ratio Calculator
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Color Contrast Checker - WCAG Accessibility Checker
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Color Converter (HEX/RGB/HSL)
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Compound Interest Calculator - Investment Growth Calculator
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Countdown Timer - Days Until Date Calculator
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CSS Gradient Generator - Linear & Radial Gradient Maker
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Dog Age Calculator - Convert Dog Years to Human Years
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Electricity Cost Calculator - Energy Bill Calculator
Calculate your appliance electricity cost instantly. Free online energy cost calculator to estimate daily, monthly, and yearly power consumption expenses.
Exercise Calorie Equivalent Calculator
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Markdown to HTML Converter
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Random Number Generator - RNG Picker
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Reading Time Calculator - Word Count & Reading Speed Estimator
Reading Time Calculator - Word Count & Reading Speed Estimator
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Calculate optimal recovery time after workouts. Free online recovery calculator for athletes and fitness enthusiasts.
Restaurant Tip Calculator
Calculate restaurant tips easily with preset percentages and bill splitting. Find the perfect tip amount for your dining experience.
Retirement Calculator - Retirement Planning Calculator
Plan your retirement with our free online retirement calculator. Calculate how much you need to save, when you can retire, and your retirement income needs.
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Convert numbers to Roman numerals and vice versa instantly. Free online Roman numeral converter with support for numbers 1-3999.
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Calculate safe listening time based on noise level. OSHA-compliant noise exposure calculator to protect your hearing from damage.
Sales Tax Calculator - Tax Rate Calculator
Calculate sales tax and final price instantly. Free online sales tax calculator with US state tax rates and custom tax options.
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Calculate how long it takes to reach your savings goal. Plan monthly deposits and track progress toward your financial target. Free online savings planner.
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Calculate your ideal screen time balance and digital wellness score. Track device usage and find healthy screen time limits for better mental health.
Sleep Calculator - Sleep Cycle Calculator
Calculate optimal sleep and wake times based on 90-minute sleep cycles. Free online sleep calculator for better rest and energy.
Solar Panel Calculator - Solar Energy Production Calculator
Calculate your solar panel energy production instantly. Free online solar calculator to estimate daily, monthly, and yearly power generation with cost savings.
Solar Panel ROI Calculator - Solar Investment Return Calculator
Calculate solar panel ROI, payback period, and lifetime savings. Free online solar investment calculator with tax credit and electricity rate analysis.
Standard Deviation Calculator
Calculate standard deviation, variance, mean, and range for any dataset. Free online statistics calculator.
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Calculate your swimming pace per 100m, 50m, or 25m. Track your pool swimming speed and performance.
Table Tip Calculator
Split restaurant bills and calculate tips for each person with tax and multiple tip percentages
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Calculate your target heart rate zone for exercise instantly. Free online heart rate calculator using Karvonen method with fitness level adjustments.
TDEE Calculator - Total Daily Energy Expenditure
Calculate your Total Daily Energy Expenditure (TDEE) to know how many calories you burn daily based on your activity level.
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Calculate test grades, scores, and letter grades instantly. Free online grade calculator with GPA conversion. Find what grade you got on any test.
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Format and clean text instantly. Remove extra spaces, line breaks, and special characters. Convert case, sort lines, and more. Free online text formatter.
Text Readability Optimizer
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Text Readability Score Calculator - Flesch-Kincaid Analyzer
Calculate text readability scores instantly. Free online readability analyzer with Flesch-Kincaid, Gunning Fog, and more metrics.
Text Statistics Analyzer - Word Count, Sentence & Character Analysis
Analyze text with detailed statistics: word count, character count, sentences, paragraphs, reading time, average word length, and more. Free online text analyzer tool.
Tile Calculator - Flooring & Tiling Calculator
Calculate tiles needed for any room. Free online tile calculator with waste percentage and cost estimation.
Time Calculator - Duration & Time Difference Calculator
Calculate time duration, add or subtract hours/minutes/seconds instantly. Free online time difference calculator for scheduling and planning.
Time Card Calculator
Calculate total hours worked, overtime, and pay from your time card entries. Track daily hours, breaks, and weekly totals.
Time Difference Calculator
Calculate the exact time difference between two dates and times. Get results in days, hours, minutes, and seconds.
Time Duration Calculator - Time Difference Calculator
Calculate time duration between two times instantly. Free online time difference calculator with add/subtract time functions.
Time Zone Calculator
Convert time between different time zones and calculate time differences. Find the best meeting time across multiple time zones.
Time Zone Converter - World Clock
Convert time between time zones instantly. Free online world clock and time zone converter for global meetings and travel planning.
Tip Calculator - Restaurant Gratuity Calculator
Calculate restaurant tips and split bills instantly. Free online tip calculator with customizable tip percentages and bill splitting.
Tip Percentage Calculator - Find Tip Rate & Percentage
Calculate tip percentage from bill and total amounts. Find what percentage tip you left or need to add. Free online tip rate calculator.
Tip Splitter Calculator
Split a restaurant bill with tip among multiple people. Calculate per-person cost including tip percentage.
Unit Converter
Convert units instantly - length, weight, temperature, volume, area, speed, and more. Free online unit converter for everyday use.
UUID/GUID Generator & Validator
Generate UUIDs (v1, v3, v4, v5) and validate UUID formats. Free online UUID generator for developers with batch generation.
UV Index Calculator - Sun Exposure & Sunscreen Calculator
Calculate UV Index and safe sun exposure time. Get sunscreen SPF recommendations and skin protection guidelines based on your location and skin type. Free online UV calculator.
Visceral Fat Calculator - Body Fat Distribution Analyzer
Calculate your visceral fat level instantly. Free online internal body fat calculator to assess health risks and get personalized recommendations.
VO2 Max Calculator - Cardiovascular Fitness & Oxygen Consumption Calculator
Calculate your VO2 Max instantly. Free online VO2 max calculator to assess cardiovascular fitness, aerobic capacity, and endurance level based on heart rate and exercise data.
Waist-to-Hip Ratio Calculator - WHR Health Risk Assessment
Calculate your Waist-to-Hip Ratio (WHR) instantly. Free online WHR calculator to assess health risks, body shape, and cardiovascular risk based on WHO guidelines.
Water Intake Calculator - Daily Hydration Calculator
Calculate your daily water intake needs based on weight, activity level, and conditions. Free online hydration calculator with personalized recommendations.
Plant Watering Schedule Calculator - Indoor Plant Care Planner
Create personalized watering schedules for your houseplants. Track watering frequency based on plant type, pot size, and season.
Weight Goal Calculator - Time to Goal & Daily Calorie Target
Calculate how long it takes to reach your goal weight and your daily calorie target. Set weight loss or gain goals with personalized calorie recommendations. Free online weight goal planner.
Weight Loss Rate Calculator - Time to Goal Calculator
Calculate your weight loss timeline instantly. Free online weight loss calculator to estimate weeks/months to reach your goal weight with healthy loss rates.
Word & Character Counter - Text Analyzer
Count words, characters, paragraphs, and sentences in real-time. Perfect for writers, students, and content creators.
Work Hours Calculator - Time Card & Pay Calculator
Calculate work hours, overtime, and pay instantly. Free online time card calculator with break deductions and hourly rate calculations.
Workout Rest Timer - Gym Rest Timer & Interval Timer
Free online workout rest timer for gym workouts. Set rest intervals between sets with customizable timers, sound alerts, and vibration. Perfect for strength training and HIIT.
Workout Split Calculator - Workout Routine Planner
Get personalized workout split recommendations based on your goals, experience level, and available days. Free online workout routine planner with Full Body, Upper/Lower, PPL, and more.