Everyday questions.
Simple answers.
Calculate, convert, and get on with your day. A thoughtful collection of handy tools, all in one quiet corner of the web.
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30 tools ready to help
Scientific calculator
From everyday arithmetic to powers, roots and trigonometry.
Percentage calculator
Find a percentage of any number in one simple step.
Discount calculator
See the price after a percentage discount.
Length converter
Meters, miles, feet and all the distances between.
Mass converter
Convert grams, kilograms, pounds and ounces.
Area converter
Square units, acres and hectares, made simple.
Volume converter
Liters, milliliters and US liquid measures.
Temperature converter
Switch between Celsius, Fahrenheit and Kelvin.
Speed converter
Meters per second, kilometers per hour, mph and knots.
Time converter
Milliseconds to weeks, without the mental math.
Data-size converter
Know the difference between MB, MiB, bits and bytes.
Number-base converter
Exact integer conversion from binary to base 36.
Kilograms to Grams (kg to g) Converter
Convert kilograms to grams with a fixed kg-to-g calculator, a worked example and guidance on decimal weights.
Grams to Kilograms (g to kg) Converter
Convert grams to kilograms, including quantities below one kilogram, using the exact 1000-gram relationship.
Kilograms to Pounds (kg to lb) Converter
Convert kilograms to avoirdupois pounds using the international pound definition, with a clear kg-to-lb example.
Pounds to Kilograms (lb to kg) Converter
Convert decimal pounds to kilograms with the exact international pound factor and tips for pounds-and-ounces inputs.
Centimeters to Inches (cm to in) Converter
Convert centimeters to decimal inches using 2.54 cm per inch, with examples for measurements and dimensions.
Inches to Centimeters (in to cm) Converter
Convert inches to centimeters, including decimal-inch measurements, with an exact inch-to-centimeter formula.
Meters to Feet (m to ft) Converter
Convert meters to international feet with a worked example and an explanation of decimal feet versus feet and inches.
Feet to Meters (ft to m) Converter
Convert international feet to meters and learn how to enter mixed feet-and-inches measurements correctly.
Kilometers to Miles (km to mi) Converter
Convert kilometers to statute miles using the exact international mile definition, with a 5 km worked example.
Miles to Kilometers (mi to km) Converter
Convert statute miles to kilometers with an exact miles-to-km factor and an example for road distances.
Celsius to Fahrenheit (°C to °F) Converter
Convert Celsius temperatures to Fahrenheit with the 9/5 scale factor, 32-degree offset and practical examples.
Fahrenheit to Celsius (°F to °C) Converter
Convert Fahrenheit readings to Celsius by removing the 32-degree offset, then applying the 5/9 scale factor.
Liters to Milliliters (L to mL) Converter
Convert liters to milliliters with the exact metric relationship and examples for bottle and container capacities.
Milliliters to Liters (mL to L) Converter
Convert milliliters to liters and express small liquid volumes as decimal liters, with a 750 mL example.
Kilometers per Hour to Miles per Hour (km/h to mph)
Convert speed from kilometers per hour to miles per hour, with a 100 km/h example and an exact distance factor.
Miles per Hour to Kilometers per Hour (mph to km/h)
Convert miles per hour to kilometers per hour using the exact international mile factor, with a 60 mph example.
Hours to Minutes (h to min) Converter
Convert decimal hours to minutes, with examples explaining why 1.5 hours means 90 minutes rather than 150.
Minutes to Hours (min to h) Converter
Convert minutes to decimal hours with a clear formula and guidance for interpreting the fractional-hour result.
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Made for the everyday
Clear inputs, useful examples, and formulas you can understand.
Your numbers stay yours
Calculations run locally in your browser. No accounts, analytics, or remote calculation service.
A little precision goes a long way
Decimal results use floating-point arithmetic; base conversions use exact 64-bit integers.