FREE ONLINE TOOLS

Free Online Calculators

Calculate everything from percentages and mortgage payments to BMI, fuel costs, dates, time zones, and unit conversions with simple, accurate online tools.

All Calculators

Choose a calculator below to get a quick result with clear explanations and useful examples.

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Financial

Money, loans, investing, taxes and personal finance.

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Mortgage Calculator

Estimate monthly mortgage payments, interest and total home loan costs.

Loan Calculator

Calculate loan payments, total interest and repayment costs.

Compound Interest Calculator

Calculate compound interest and see how money can grow over time.

Interest Calculator

Calculate simple and compound interest and see how your money can grow over time.

Salary Calculator

Convert annual salary into monthly, biweekly, weekly, daily, and hourly pay.

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Health

Fitness, nutrition, wellness and health calculations.

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BMI Calculator

Calculate body mass index using your height and weight.

Calorie Calculator

Estimate daily calorie needs based on your personal information and activity level.

BMR Calculator

Estimate your basal metabolic rate and daily calories burned at rest.

Body Fat Calculator

Estimate body fat percentage using body measurements and the U.S. Navy method.

Ideal Weight Calculator

Estimate ideal body weight using established formulas and a BMI-based healthy weight range.

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Math

Percentages, fractions, ratios, averages and statistics.

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Percentage Calculator

Calculate percentages, percentage increases and decreases, and percentage differences.

Ratio Calculator

Solve ratios and calculate equivalent ratios.

Tip Calculator

Calculate tips, total bills, and per-person costs for restaurant and everyday bills.

Average Calculator

Calculate the mean average of a set of numbers.

Fraction Calculator

Add, subtract, multiply and divide fractions.

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Home

Construction, measurements, flooring, paint and more.

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Area Calculator

Calculate the area of rectangles, triangles, circles and other common shapes.

Volume Calculator

Calculate the volume of rectangular prisms, cylinders, spheres and other common shapes.

Concrete Calculator

Estimate the amount of concrete needed for a project.

Square Footage Calculator

Calculate the area of rooms, floors, yards and other rectangular spaces.

Paint Calculator

Estimate how much paint you need based on wall dimensions, doors, windows, number of coats, and paint coverage.

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Auto

Car payments, fuel costs, mileage and vehicle calculations.

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Car Payment Calculator

Estimate monthly car payments and total auto loan costs.

Fuel Cost Calculator

Estimate the cost of fuel for a trip based on distance, fuel efficiency, and fuel price.

Gas Mileage Calculator

Calculate your vehicle's gas mileage and fuel economy from distance traveled and fuel used.

Fuel Economy Calculator

Convert fuel economy between MPG, L/100 km, km/L, and other common measurements.

Car Depreciation Calculator

Estimate vehicle depreciation, value loss, and future resale value.

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Education

Grades, GPA, test scores and school calculations.

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GPA Calculator

Calculate your grade point average using course grades and credits.

Grade Calculator

Calculate your percentage and letter grade from points earned and points possible.

Final Grade Calculator

Calculate the grade you need on your final exam to achieve your desired overall course grade.

Percentage Grade Calculator

Calculate your percentage grade from points earned and points possible.

Test Grade Calculator

Calculate your test percentage and letter grade from correct answers and total questions.

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Date & Time

Calculate age, dates, time durations, business days, and time-zone conversions.

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Age Calculator

Calculate your exact age in years, months, weeks, days, hours, and minutes.

Date Calculator

Calculate the time between dates or add and subtract days, weeks, and months from a date.

Time Duration Calculator

Calculate the time between two times in hours, minutes, total minutes, and decimal hours.

Business Days Calculator

Calculate the number of working days between two dates, excluding weekends and optional holidays.

Time Zone Calculator

Convert a date and time between major time zones and compare local times around the world.

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Converters

Convert length, weight, temperature, area, volume and more.

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Length Converter

Convert between common units of length and distance.

Weight Converter

Convert between kilograms, grams, pounds, ounces, stones, and other common weight units.

Temperature Converter

Convert temperatures between Celsius, Fahrenheit, and Kelvin.

Area Converter

Convert between square meters, square feet, acres, hectares, and other common area units.

Volume Converter

Convert between liters, milliliters, gallons, cups, fluid ounces, and other common volume units.

Free Calculators for Everyday Decisions

Calcuvix provides free online calculators designed to make common calculations faster and easier. Whether you're working out a percentage, estimating a mortgage payment, calculating your age, checking your BMI, or converting measurements, each calculator is designed around a simple and clear user experience.

Our calculators cover financial planning, health and fitness, mathematics, home projects, automobiles, education, dates and time, and unit conversions. Each category brings together related tools so you can quickly find the calculator you need.

Calculations are performed instantly in your browser, with no account required. Select a calculator, enter your values, and get your result immediately.