Everyday Life Tools

A free online calculator that works instantly in your browser with no installation. Basic mode supports add, subtract, multiply, divide, percentages and sign toggling, while scientific mode adds trigonometry, logarithms, roots, powers, factorials, absolute value and degree/radian switching, with one-click result copying.

Fetch QQ avatars, QQ Mail avatars and QQ Zone avatars online. Simply enter a QQ number to instantly display the matching avatar — no login required and available on any device.

The latest and most complete online Emoji collection, featuring thousands of common and up-to-date emojis. Browse by category or search by keyword, then copy and paste with one click.

A free online BMI calculator: enter your height and weight to instantly get your body mass index. See whether you are underweight, normal, overweight or obese, plus tailored diet and exercise tips to help you manage your weight scientifically.

A free online unit converter covering length, weight, area, volume, temperature, data size, time, speed and more. Get instant results as you type, swap units, and copy with one click on any phone or computer.

A free online income tax calculator that computes personal income tax on wages and salaries using the cumulative withholding method. It supports social insurance and housing fund deductions as well as special additional deductions, and shows your after-tax salary.

A comprehensive and efficient online special symbols collection featuring emojis, math symbols, arrows, currency signs, punctuation, numbered lists and thousands more characters. Search by keyword and copy any symbol with a single click to boost your work and social efficiency.

A free online age calculator: enter your birth date to get your exact age in years, days lived and months, plus your zodiac sign, Chinese zodiac and the days until your next birthday.

An online countdown timer and stopwatch: count down to a custom target time or duration with days, hours, minutes and seconds shown in real time, or use it as a stopwatch — a great helper for study, work and events.

A free online mortgage calculator supporting both equal installment and equal principal repayment methods. Enter the loan amount, annual interest rate and term to get the monthly payment, total interest and total repayment — a must-have for home buyers.

An online electricity cost calculator: enter each appliance's power, daily hours and quantity, plus the price per kWh and number of days, to estimate energy use and cost. It totals multiple appliances for the whole period. Great for saving energy and household budgeting.

A free online deposit interest calculator: enter the principal, annual interest rate and term to instantly compute the interest and the total amount. Supports demand deposits, fixed-term lump-sum deposits and a simplified savings plan, with simple/compound interest switching plus monthly average interest, total amount and approximate days. Ideal for planning bank savings.

A free online ID card number parser: enter an 18-digit number to validate its format and check digit, and extract the region, date of birth and gender. A handy tool for daily verification and data entry.

An online compound interest and regular investment calculator. Enter the principal, annual return rate, term and periodic contributions to get the final balance and earnings. Supports monthly or yearly compounding — a handy tool for financial planning.

A free online social insurance and housing fund calculator for China: enter your pre-tax salary and contribution base to work out the personal and employer contributions to pension, medical, unemployment, work-injury, maternity insurance and the housing provident fund. Choose city presets (Beijing, Shanghai, Guangzhou, Shenzhen), edit each rate, optionally estimate personal income tax and copy the results in one click.

A free online clothing size converter: choose tops, trousers or shoes and convert by height/weight or by measurement (chest, waist, foot length) to get recommended sizes in Chinese, international, EU, US and UK standards, plus a shoe size chart. A handy reference when shopping across brands and countries.

A free online Pomodoro timer: focus 25 minutes, take a 5-minute break and a 15-minute long break every 4 rounds, with a clean progress ring, start/pause/skip/reset controls, adjustable durations and a Web Audio completion chime. Track completed pomodoros and rounds to stay focused.

An online bill splitter. Enter the total amount and the number of people to work out how much each person pays, with remainder handling and per-person details. Great for settling group bills and splitting costs.

An online year-end bonus tax calculator. Computes the tax payable and take-home amount using the separate taxation method for annual one-time bonuses, and flags the threshold points. Useful for year-end bonus planning.

An online lunar and Gregorian date converter that converts dates both ways between the Gregorian and Chinese lunar calendars, showing the corresponding lunar date, Chinese zodiac and sexagenary year — handy for traditional festivals and birthdays.

A free online installment interest-rate calculator: enter the loan principal, the amount paid per period, the number of periods and any one-off upfront fee to solve the real annualized rate (IRR). It also shows the monthly rate, nominal annual rate, total repayment and total interest — ideal for checking the true cost of installment loans and consumer credit.

A free online menstrual period calculator: enter the first day of your last period, your average cycle length and period length to predict your next period, the estimated ovulation day, fertile window and safe periods, with a 6-month forecast table. A handy reference for cycle tracking (not medical advice).

An online running pace calculator that converts between distance, time and pace in any direction. Supports kilometres or miles and common race presets (5K, 10K, half and full marathon). It shows your pace in min:sec per unit and your speed — handy for running and marathon training.

An online overtime pay calculator: based on your monthly salary and overtime hours, it applies 1.5x (weekdays), 2x (rest days) and 3x (statutory holidays) rates and gives the total. Handy for checking labor remuneration.

An online basal metabolic rate (BMR) and daily expenditure (TDEE) calculator. Using the Mifflin-St Jeor formula with gender, age, height, weight and activity level, it estimates your daily calorie needs and shows maintenance, fat-loss (-500) and muscle-gain (+300) targets. Great for diet and fitness planning.

An online discount calculator. Enter the original price and a discount rate or a reduced price to instantly get the final price and the amount saved. Supports stacked discounts — handy for comparison shopping and promotions.

An online GPA and grade-point calculator: add courses with credits and grades (percentage or letter) to compute your weighted average GPA. Switch between 4.0, 4.3 and 100-point scales with common conversion tables. Great for study-abroad applications and academic assessment.

An online fuel consumption and cost calculator: enter distance, fuel amount and price to get L/100km, cost per kilometre and total fuel cost. You can also work backwards from consumption, distance and price to estimate the cost. Useful for running-cost tracking and long-trip budgets.

An online due date calculator. Enter the last menstrual period or the conception date to estimate the due date, current gestational age and days remaining, with reference notes for each stage. Useful for tracking pregnancy and preconception planning.

An online calorie calculator that estimates your daily basal metabolic rate and calorie needs from height, weight, age, gender and activity level, with fat-loss and muscle-gain references — handy for healthy diet management.