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Calculate the best time to wake up or go to bed to feel refreshed by aligning with your natural 90-minute sleep cycles.

Estimate your body fat percentage using the U.

Clean, format, and compress your CSS code by removing comments and unnecessary whitespace to optimize your stylesheets.

Clean and tidy up your HTML code by removing unnecessary attributes, comments, and empty tags.

Clean and optimize your JavaScript code by removing comments and empty lines to make it more compact.

Easily calculate the area of common geometric shapes like squares, rectangles, and circles.

Convert between various units of length and distance like meters (m), kilometers (km), centimeters (cm), miles (mi), feet (ft), and inches (in).

Convert between various units of mass and weight, including kilograms (kg), grams (g), pounds (lb), ounces (oz), and tons.

Easily convert milliliters (mL) to US fluid ounces (fl oz) and vice versa with this simple volume converter.

Easily convert between various units of time, from picoseconds to millennia.

Easily convert between various units of volume like liters, milliliters, gallons, cubic meters, and more.

Estimate your daily water needs based on your weight and activity level to stay properly hydrated.