50+ Professional calculators

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Calculators

Browse our comprehensive collection of calculators for finance, health, business, and more. Simple, accurate, and always available.

Basic Math

Percentage Calculator

Calculate percentages, percentage increase/decrease

Calculate tips and split bills

Discount Calculator

Calculate discounts, savings, and final prices

Sales Tax Calculator

Calculate sales tax - add tax to prices or remove tax from totals

Fraction Calculator

Add, subtract, multiply, and divide fractions

Finance

Investment Calculator

Calculate investment growth with compound interest

Savings Goal Calculator

Calculate how to reach your savings goals

Debt Payoff Calculator

Compare snowball vs avalanche debt strategies

Mortgage Calculator

Full amortization with PMI, property tax, and insurance

Advanced Loan Calculator

Amortization schedules, extra payments, and comparison tools

Salary Calculator

Gross to net, hourly to annual, with tax calculations

Unit Conversion

Length Converter

Convert between meters, feet, inches, and more

Weight Converter

Convert between kilograms, pounds, ounces, and more

Temperature Converter

Convert between Celsius, Fahrenheit, and Kelvin

Advanced Unit Converter

Convert between 20+ unit categories

Date & Time

Calculate age from birthdate with precision

Timezone Converter

Convert times between different timezones

Date Calculator

Calculate date differences, add/subtract days, weeks, months

Time Duration Calculator

Calculate time durations, convert between formats, and handle time arithmetic

Health & Fitness

Calculate your Body Mass Index with WHO categories

Calorie Calculator (TDEE)

Calculate Total Daily Energy Expenditure and calories

Macro Calculator

Detailed macronutrient breakdown for different goals

Advanced Calorie Calculator

Calculate TDEE with multiple formulas comparison and customizable macro splits

Body Fat Calculator

Calculate body fat percentage using Navy, BMI, or skinfold measurement methods

Business

Margin Calculator

Calculate profit margins, markup, and selling prices

Advanced ROI Calculator

NPV, IRR, payback period, and investment analysis

Break-Even Calculator

Calculate break-even point with visual chart showing costs vs revenue analysis