Number Tools

Free online calculators and converters for units, percentages, time, and mathematical calculations. Convert between metric and imperial units instantly with our comprehensive unit converter supporting length, weight, temperature, volume, and 16 specialised categories. Calculate percentages, percentage increase, discounts, and ratios with our free percentage calculator designed for students, shoppers, and analysts. Our time calculator handles date differences, duration calculations, and time zone offsets with complete accuracy. Convert seconds to hours, days to months, and any time unit with precision. Calculate knitting gauge conversions to resize patterns, or use the ratio calculator to solve proportions. All calculators provide instant results with adjustable decimal precision, making complex maths easy, fast, and accurate for everyone.