Age, date, time, grade and unit calculators. 69 calculators — all free, no sign-up.
Calculate your exact age from your date of birth.
→Calculate the difference between two dates.
→Count the days until or since a date.
→Find the weekday of any date.
→Calculate the difference between two times.
→Calculate your work hours and pay.
→Calculate the duration between two times.
→Calculate your grade point average.
→Calculate your final grade and passing status.
→Convert length, weight, temperature and more.
→Calculate the fuel cost of any trip.
→Calculate fuel consumption (L/100km or MPG).
→Estimate the cost of running an appliance.
→Calculate the concrete volume needed for a project.
→Calculate area in square meters or square feet.
→Generate strong, random passwords.
→Calculate subnet and address range from an IP.
→Calculate data transfer time and bandwidth.
→Calculate speed, distance and time relationships.
→Convert between kilograms, pounds and more.
→Convert between meters, inches, feet and more.
→Convert between Celsius, Fahrenheit and Kelvin.
→Calculate percentage error of a measurement.
→Calculate the ratio between two numbers.
→Convert numbers to and from Roman numerals.
→Encode and decode text with Base64.
→Encode and decode URLs.
→Roll virtual dice.
→Calculate love compatibility from names.
→Calculate your retirement age and time remaining.
→Estimate the total cost of college education.
→Solve quadratic equations and find roots.
→Add, multiply and find determinants of matrices.
→Calculate core statistical values.
→Calculate statistical p-values.
→Calculate the z-score of a data point.
→Calculate resistor color codes and values.
→Calculate voltage, current, resistance and power.
→Calculate voltage drop in a cable.
→Calculate engine horsepower.
→Convert between kW and horsepower.
→Calculate the BTU needed to heat or cool a room.
→Calculate the dew point from temperature and humidity.
→Calculate the felt (heat index) temperature.
→Calculate the wind chill temperature.
→Calculate the gravel volume needed for a project.
→Calculate roof area and materials needed.
→Calculate stair dimensions and step count.
→Calculate the number of tiles needed.
→Calculate solution molarity.
→Calculate the molecular weight of a compound.
→Calculate arithmetic and geometric sequences.
→Calculate the payback period of an investment.
→Calculate profit from cost and selling price.
→Calculate required minimum distributions.
→Calculate mutual fund returns.
→Estimate your social security benefits.
→Convert shoe sizes between systems.
→Calculate tire dimensions.
→Calculate your golf handicap.
→A fun marriage compatibility calculator.
→Calculate travel time from distance and speed.
→Calculate the sample size needed for a survey.
→Determine your body type from measurements.
→Calculate your bra size.
→Calculate your daily water requirement.
→Assess your height and weight status.
→Convert times between time zones.
→Calculate percentage change between two values.
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