Running and walking pace, speed relationships and common everyday unit-conversion formulas. Use the calculators for your own numbers and the guides for formulas, examples and common questions.
Use the tool that matches the exact problem you need to solve.
Calculate average running pace and speed from distance and elapsed time.
Calculate walking pace and speed from distance and elapsed time.
Convert speed between miles per hour, kilometers per hour, meters per second and knots.
Convert vehicle fuel economy between miles per gallon (U.S.) and liters per 100 kilometers.
Convert length between inches, feet, yards, miles, millimeters, centimeters, meters and kilometers.
Convert weight and mass between ounces, pounds, stones, grams, kilograms and metric tonnes.
Convert temperature between Fahrenheit, Celsius and Kelvin.
Convert area between square feet, square meters, acres, hectares, square miles and other common units.
Convert volume between U.S. gallons, quarts, pints, cups, fluid ounces, liters and milliliters.
Convert pressure between psi, pascals, kilopascals, bar and atmospheres.
Convert energy between joules, kilojoules, calories, kilocalories, watt-hours and kilowatt-hours.
Convert digital storage between bytes, kilobytes, megabytes, gigabytes and terabytes using decimal units.
Convert inches to centimeters.
Convert centimeters to inches.
Convert pounds to kilograms.
Convert kilograms to pounds.
Convert Fahrenheit temperatures to Celsius.
Convert Celsius temperatures to Fahrenheit.
Convert US customary cups to milliliters.
Convert US liquid gallons to liters.
3 focused guides and worked examples for this calculator cluster.
Quick conversion formulas and charts for length, weight, temperature, volume, speed and energy, with worked examples and free converters.
Read guide →Pace, Speed & Unit ConversionsLearn how to calculate running pace per mile or kilometer from total time and distance. See formulas, worked examples and related free calculators.
Read guide →Pace, Speed & Unit ConversionsLearn the direct formula for converting miles per hour into minutes per mile. See formulas, worked examples and related free calculators.
Read guide →Running and walking pace, speed relationships and common everyday unit-conversion formulas. The pages in this cluster are intentionally connected: calculator pages handle the arithmetic, while the guides answer informational searches, show worked examples and explain how to interpret the result.
Use the examples as reference points, then open a calculator and substitute your own values. For decisions involving contracts, taxes, health, payroll rules, construction requirements or other high-stakes details, verify the real-world assumptions with an appropriate authoritative source.
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