Smart Calculators for Everyday Life
Discover simple, accurate, and easy-to-use calculators for everyday math, finance, education, dates, and conversions.
Popular Calculators
Factor Calculator
Find every factor of a number, its prime factorization, and whether it is prime.
EducationGPA Calculator
Calculate your GPA from letter grades and credits, for one semester or cumulatively with a previous GPA.
Date & TimeAge Calculator
Calculate exact age from a date of birth: years, months and days, total days lived, the day of the week you were born, and when your next birthday falls.
MathPercentage Increase Calculator
Calculate percentage increase between two values instantly.
FinanceDividend Calculator
Calculate dividend income from shares owned: annual, quarterly and monthly income, dividend yield and total invested.
MathStandard Deviation Calculator
Calculate standard deviation (population and sample), variance and mean for any data set.
EducationWeighted Grade Calculator
Compute a weighted grade average from scores and their syllabus weights — homework, quizzes, tests, finals.
FinanceGold Value Calculator
Calculate the melt value of gold jewelry, coins or bullion from weight, karat purity and the spot price you enter.
Browse by Category
Math Calculators
Percentages, statistics, algebra and geometry — solved step by step.
34 calculatorsFinance Calculators
Loans, mortgages, investing and everyday money math made clear.
26 calculatorsEducation Calculators
GPA, grades and test-score estimates for students and teachers.
14 calculatorsDate & Time Calculators
Ages, durations, deadlines and work hours — counted precisely.
13 calculatorsConversion Calculators
Units converted accurately — length, weight, cooking, electrical and more.
13 calculatorsRecently Added Calculators
Area Converter
Convert area between square feet, square meters, square yards, square inches, acres, hectares, square kilometers and square miles with exact factors.
ConversionLiquid Conversion Converter
Convert between all US liquid measures and metric: teaspoons, tablespoons, fluid ounces, cups, pints, quarts, gallons, milliliters and liters.
ConversionSquare Feet to Cubic Yards Converter
Convert an area in square feet and a depth in inches into cubic yards and cubic feet — the amount of concrete, soil, mulch or gravel you actually need to order.
ConversionGallons to Pounds Converter
Convert US gallons to pounds (and pounds to gallons) by liquid: water 8.
ConversionTorque Converter
Convert torque between newton-meters (Nm), foot-pounds (ft-lb), inch-pounds (in-lb) and kilogram-centimeters (kgf·cm) with exact factors.
ConversionAmps to kW Converter
Convert amps to kilowatts for DC, single-phase and three-phase AC with power factor — and back: kW to amps, VA to amps, amps to VA, kVA to kW.
ConversionMilliliters to Grams Converter
Convert milliliters to grams and grams to milliliters using the density of the substance — water, milk, olive oil, honey, flour, sugar and ethanol.
ConversionMilliliters to Ounces Converter
Convert milliliters to US fluid ounces and between liters, cups, tablespoons, teaspoons and gallons.
Why Choose CalcMira?
- Real calculations, shown openly. Every calculator displays the formula it uses and a worked example, so you can check the answer instead of trusting a black box.
- Free, with no sign-up. All 100 calculators run instantly in your browser. Nothing to install, no account, no paywall.
- Your inputs stay on your device. Calculations happen on the page itself — the numbers you type are not sent to a server.
- Assumptions stated, not hidden. Where a result depends on a choice — a tax estimate, a scoring table, a density — the page says so in plain language.
- Built for phones first. Large, clearly labeled inputs and results that are easy to read on any screen.