Energy Converter
Energy Converter supports conversions and calculations between various energy units including Joule(J), Kilojoule(kJ), Calorie(cal), Kilocalorie(kcal), Kilogram-Meter(kg·m), Kilowatt-Hour(kW·h), Watt-Hour(W·h), Metric Horsepower-Hour(ps·h), Electronvolt(eV), British Thermal Unit(btu), Foot-Pound(ft·lb), Horsepower-Hour(hp·h) and more.
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Base Converter
Base Converter supports arbitrary conversions between 2 and 36 bases, and also supports floating-point types conversion.
Twin Calculators
Twin Calculators (Twofold Calculators), which combines two calculators into one, and the calculation result can be copied and pasted between the two calculators with one click.
Perimeter Calculator
Perimeter Calculator supports perimeter calculations for common geometric figures such as Circular, Sector, Ellipse, Triangle, Square, Rectangle, and Parallelogram. You can use different formulas and methods to calculate the perimeter of these geometric figures depending on the shape and the given information.
Area Calculator
Area Calculator supports area calculations for common geometric figures such as Circular, Sector, Ring, Ellipse, Triangle, Square, Rectangle, Parallelogram and Trapezoid.