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330+ free calculators and converters. Fast, accurate, and easy to use.
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Popular Tools
The tools our users love the most
Mortgage Calculator with PMI
Calculate your monthly mortgage payment including PMI, taxes, and insurance
BMI Calculator
Calculate your Body Mass Index with Imperial or Metric units
Paint Calculator
Calculate how much paint you need for wall coverage
Word Counter
Count words, characters, and sentences in text
Compound Interest Calculator
Calculate compound interest growth over time
TDEE Calculator
Calculate your Total Daily Energy Expenditure
Tip Calculator
Calculate tips with split bill functionality
Password Generator
Generate secure passwords with strength indicator
Square Footage Calculator
Calculate square footage for rooms and areas
Concrete Calculator
Calculate how many bags of concrete you need
Love Compatibility Test
Test your love compatibility using the classic FLAMES method and numerology based on names
Dice Roller
Roll virtual dice for tabletop RPGs. Supports D4, D6, D8, D10, D12, D20 with visual animations, modifiers, and dice notation like 2d6+3.
Featured Tools
Hand-picked tools to get you started
Mortgage Calculator with PMI
Calculate your monthly mortgage payment including PMI, taxes, and insurance
401(k) Savings Calculator
Calculate your 401(k) retirement savings with employer match
Tip Calculator
Calculate tips with split bill functionality
Compound Interest Calculator
Calculate compound interest growth over time
BMI Calculator
Calculate your Body Mass Index with Imperial or Metric units
TDEE Calculator
Calculate your Total Daily Energy Expenditure
Concrete Calculator
Calculate how many bags of concrete you need
Paint Calculator
Calculate how much paint you need for wall coverage
Square Footage Calculator
Calculate square footage for rooms and areas
Word Counter
Count words, characters, and sentences in text
Password Generator
Generate secure passwords with strength indicator
Percentage Calculator
Calculate percentages, increases, and decreases
Contrast Checker (WCAG)
Check color contrast ratio for WCAG 2.1 AA/AAA accessibility compliance
Regex Tester
Test regular expressions with live matching and capture group extraction
Px to Rem Converter
Convert between pixels and rem units for responsive CSS design
CSS Gradient Generator
Create beautiful linear and radial CSS gradients with live preview