All Calculators & Tools - 361+ Functions in 41+ Professional Tools

Calculators, converters, and tools for math, finance, health, engineering, and more

🔥More Functions Per Tool Than Any Competitor
41+
Professional Tools
361+
Built-in Functions
10M+
Calculations
100%
Free to Use
Showing 41 of 41 tools
980K+
8 Functions

Calorie Calculator

Calculate daily calorie needs and weight goals

Health
Calculator
920K+
9 Functions

Loan Payment Calculator

Calculate loan payments, interest, and payoff schedules

Finance
Calculator
890K+
6 Functions

Average Calculator

Calculate mean, median, mode, and range of numbers

Math
Calculator
890K+
14 Functions
Multi-Function

Weight Converter

Convert between 14+ weight and mass units

Engineering
Converter
850K+
18 Functions
Multi-Function

Area Calculator

Calculate area for 18+ geometric shapes

Engineering
Calculator
760K+
8 Functions

Paycheck Calculator

Calculate take-home pay, taxes, and deductions

Finance
Calculator
750K+
4 Functions

Text Counter

Count characters, words, lines, and paragraphs

Text
Tool
720K+
8 Functions

Fraction Calculator

Add, subtract, multiply, and divide fractions

Math
Calculator
680K+
6 Functions

Simple Interest Calculator

Calculate simple interest for loans and investments

Finance
Calculator
670K+
6 Functions

Temperature Converter

Convert between Celsius, Fahrenheit, and Kelvin

Engineering
Converter
650K+
5 Functions

Square Root Calculator

Calculate square roots, cube roots, and nth roots

Math
Calculator
640K+
7 Functions

Password Generator

Generate secure passwords with custom options

Security
Tool
590K+
6 Functions

Date Calculator

Calculate date differences and add/subtract days

Time
Calculator
580K+
5 Functions

GPA Calculator

Calculate GPA with different grading scales

Grade
Calculator
540K+
6 Functions

Discount Calculator

Calculate discounts, sale prices, and savings

Math
Calculator
520K+
8 Functions

Color Converter

Convert between RGB, HEX, HSL, and other color formats

Design
Converter
510K+
4 Functions

Age Calculator

Calculate exact age in years, months, and days

Time
Tool
480K+
6 Functions

Color Picker

Professional color picker with palette generation

Design
Tool
460K+
8 Functions

QR Code Generator

Generate QR codes for text, URLs, and more

Web
Tool
450K+
5 Functions

Sales Tax Calculator

Calculate sales tax, total price, and tax rates

Finance
Calculator
430K+
4 Functions

Tip Calculator

Calculate tips and split bills for groups

Math
Calculator
420K+
4 Functions

Case Converter

Convert text to UPPERCASE, lowercase, Title Case

Text
Tool
390K+
8 Functions

Time Converter

Convert between time zones and time formats

Time
Converter
380K+
5 Functions

Notepad

Simple, fast, and secure online text editor

Text
Tool
350K+
6 Functions

Image Converter

Convert images between different formats

Web
Tool
340K+
8 Functions

Voltage Converter

Convert between voltage units and calculate power

Engineering
Converter
320K+
8 Functions

Number Base Converter

Convert between binary, decimal, hexadecimal, and octal

Math
Converter
320K+
4 Functions

URL Shortener

Create short URLs and track clicks

Web
Tool
290K+
9 Functions

Power Converter

Convert between power units (watts, horsepower, etc.)

Engineering
Converter
280K+
5 Functions

Hash Generator

Generate MD5, SHA1, SHA256 hashes

Security
Tool
250K+
10 Functions
Multi-Function

Energy Converter

Convert between 10+ energy units

Engineering
Converter
210K+
3 Functions

ASCII Table

Complete ASCII character reference table

Text
Tool
180K+
7 Functions

Frequency Converter

Convert between frequency units (Hz, MHz, GHz)

Engineering
Converter
160K+
4 Functions

Fractional Inches Converter

Convert between decimal and fractional inches

Engineering
Converter
2.3M+
25 Functions
Multi-Function

Scientific Calculator

Advanced mathematical calculations with trigonometry, logarithms, and more

Math
Calculator
2.1M+
52 Functions
Multi-Function

Currency Converter

Convert between 50+ world currencies with live rates

Finance
Converter
1.8M+
8 Functions

Percentage Calculator

Calculate percentages, percentage change, and percentage of numbers

Math
Calculator
1.5M+
12 Functions
Multi-Function

Compound Interest Calculator

Calculate compound interest with various compounding frequencies

Finance
Calculator
1.4M+
6 Functions

BMI Calculator

Calculate Body Mass Index and health categories

Health
Calculator
1.2M+
10 Functions
Multi-Function

Mortgage Calculator

Calculate monthly payments, total interest, and amortization

Finance
Calculator
1.1M+
16 Functions
Multi-Function

Length Converter

Convert between 16+ length units

Engineering
Converter

Why Choose Multi-Function Calculators?

Unlike simple calculator sites with hundreds of basic tools, our 41 professional calculators each contain multiple functions. Our Scientific Calculator alone has 25+ mathematical functions, while our Currency Converter supports 50+ currencies. This means fewer bookmarks, faster calculations, and more powerful results.

361
Total Functions
9
Avg Functions Per Tool
8
Power Tools (10+ Functions)