Best Calculators - 500+ Free Online Calculator Tools

Free online calculators for math, finance, health, construction, and more. Fast, accurate, and mobile-friendly tools for all your calculation needs.

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Calculator Categories

Choose from our comprehensive collection of specialized calculators across 12 categories

Finance

Calculators for loans, investments, savings, and other financial planning tools.

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Math & Conversion

Mathematical formulas, unit conversions, and scientific calculations.

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Health & Fitness

Track your health metrics, calculate BMI, calories, and fitness goals.

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Tax & Salary

Tools to calculate taxes, salaries, deductions, and take-home pay.

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Construction & DIY

Building materials, measurements, and project cost estimation tools.

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Automotive

Vehicle loan payments, fuel efficiency, maintenance costs, and more.

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Food & Cooking

Nutrition tracking, recipe scaling, and cooking measurement conversions.

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Everyday Life

Practical tools for daily tasks, time management, and life planning.

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Business & Productivity

Tools for business planning, productivity tracking, and resource management.

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Sports

Performance metrics and calculations for various sports and activities.

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Environmental & Green

Carbon footprint, energy savings, and environmental impact calculations.

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Education & Academic

Educational calculators for grades, GPA, study planning, and academic calculations.

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Specialized Tools

Advanced calculators and specialized tools for specific professions.

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Technology

Essential calculators for tech professionals, IT teams, and digital enthusiasts.

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Popular Calculators

Our most-used free online calculators — trusted by thousands of users every day

Mortgage Calculator

Calculate monthly payments with PITI

BMI Calculator

Calculate Body Mass Index

Compound Interest

See how your money grows

Percentage Calculator

Calculate percentages instantly

TDEE Calculator

Daily energy expenditure

GPA Calculator

Calculate your grade point average

Age Calculator

Calculate age in years, months, days

Tip Calculator

Calculate tips and split bills

Concrete Calculator

Estimate concrete for your project

Fuel Cost Calculator

Calculate trip fuel costs

Calorie Deficit

Plan your weight loss journey

Savings Calculator

Plan your savings goals

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