All Calculators
Free online calculators for money, health, home improvement, work, and school.
💰 Money Calculators
Tip Calculator
Calculate tip amount, total bill, and cost per person. Quick tip percentages at 15%, 18%, 20%, or custom.
Bill Split Calculator
Split a restaurant bill evenly including tip and tax. See exactly how much each person should pay.
Hourly to Salary Calculator
Convert your hourly wage to annual, monthly, and weekly salary. See what $15, $20, $25+ per hour equals per year.
💪 Health & Fitness
BMI Calculator
Calculate body mass index from height and weight, plus BMI category and a healthy weight range estimate.
Calorie Calculator
Estimate daily calories for maintenance, weight loss, or weight gain based on age, sex, height, weight, and activity level.
Water Intake Calculator
Estimate daily water intake from weight, exercise time, and hot or humid climate needs.
Target Heart Rate Calculator
Estimate target workout heart rate and training zone using age, resting heart rate, and exercise intensity.
🏠 Home & DIY
💼 Work & Productivity
Word Counter
Count words, characters, sentences, and paragraphs for essays, posts, emails, and work documents.
Reading Time Calculator
Estimate how long text takes to read based on word count and reading speed in words per minute.
Meeting Cost Calculator
Estimate the cost of a meeting from attendees, hourly rate, duration, and weekly frequency.
Time Duration Calculator
Calculate elapsed time between two clock times in hours, minutes, total minutes, and decimal hours.