Free Online Calculators - Math, Fitness, Finance, Science

Calculator3.com sole focus is to provide fast, comprehensive, convenient, free online calculators in a plethora of areas. Currently, we have around 200 calculators to help you "do the math" quickly in areas such as finance, fitness, health, math, and others, and we are still developing more. Our goal is to become the one-stop, go-to site for people who need to make quick calculations.Therefore, all of our tools and services are completely free, with no registration required.

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Free Online Calculators Categories 

Online calculator for quick calculations, along with a large collection of calculators on math, finance, fitness, and more, each with related in-depth information.

Financial Calculators

A compilation of free financial calculators involving mortgages, loans, investments, debt, credit cards, retirement, and more, each with related information to gain in-depth knowledge.

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Fitness & Health Calculators

Explore a variety of free fitness and health calculators including a BMI calculator, body fat calculator, calorie calculator, ideal weight calculator, and a number of pregnancy calculators

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Math Calculators

This is a free online math calculator together with a variety of other free math calculators that compute standard deviation, percentage, fractions, and time

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Other Calculators


flash_on Electrical calculators  Grade calculators wb_incandescent Lighting calculators functions Math calculators power Wire calculators schedule Time calculators

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Step-by-Step Math Problem Solver

Algebra Calculator shows you the step-by-step solutions! Solves algebra problems and walks you through them.

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Electrical calculators

Electrical Calculators. Online electrical calculators for calculations of electricity and electronics. Amps to kW calculator · Amps to kVA calculator ·

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Grade calculators

This free grade calculator can calculate a weighted average grade. It accepts both numerical as well as letter grades. I

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Power Wire calculators

Wire Gauge calculators. Wire gauge calculator · AWG to mm calculator · SWG to mm calculator · Voltage drop calculator ·

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Time calculators

This free time calculator can add or subtract time values in terms of number of days, hours, minutes, or seconds. Learn more about different concepts of time, and explore other similar calculators such as the date calculator for determining time between two dates

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Conversion

This free conversion calculator converts between common units of length, temperature, area, volume, weight, and time.

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Lighting calculators & calculations

Lighting calculators & calculations. Calculators. Candela to lumens calculator · Candela to lux calculator · Footcandles to lux calculator ·

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Most Searched Calculators 

Online calculator for quick calculations, along with a large collection of calculators on math, finance, fitness, and more, each with related in-depth information.

Age calculator

Percentage calculator

Loan calculator

Scientific calculators

Home loan calculator

FD calculator

Income tax calculation

Calculator bmi

Loan calculator

Compound interest calculator

Interest calculator

Body fat calculator

RD calculator

Discount calculator

Sukanya samriddhi yojana calculator

Hdfc fd calculator

SIP calculator

Mutual Fund Return Calculator

Lumpsum Calculator

SWP Calculator


Free Online Calculators – Math, Fitness, Finance, Science 

This is a free online math calculator together with a variety of other free math calculators that compute standard deviation, percentage, fractions, and time and Online calculator for quick calculations, along with a large collection of calculators on math, finance, fitness, and more, each with related in-depth information.

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Latest Calculators

“calculate anything, anytime, anywhere… Free online calculators for everything. Some solve problems, some satisfy curiosity and some simply for fun.

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