All Free Online Converters & Calculators

Professional-grade conversion tools and calculators for developers, engineers, students, and professionals. Browse by category, search by name, or filter by features.

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Discover specialized calculators and converters organized by category to find exactly what you need

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Showing 53 of 53 tools

Time & Date

Convert timestamps, timezones, and create countdowns

4 tools

🕐

Timestamp Converter

Convert Unix timestamps to human-readable dates and vice versa. Free, accurate, and instant Converters with timezone support.

Time & Date

🟢 Easy

📊 Monthly searches45.0K

timestamp converterunix timestamp converterepoch converter+7 more

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⏰

Countdown Timer

Create countdown timers for events and deadlines

Time & Date

🟢 Easy

📊 Monthly searches82.0K

countdowntimerevent+3 more

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📅

Date Difference Calculator

Calculate the difference between two dates in days, months, and years

Time & Date

🟢 Easy

📊 Monthly searches52.0K

datedifferencecalculator+3 more

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🌍

Timezone Converter

Convert time between different time zones instantly. Free online timezone converter with support for all world time zones and daylight saving time.

Time & Date

🟢 Easy

📊 Monthly searches89.0K

timezone convertertime zone conversionworld time converter+5 more

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Finance

77+ financial calculators for loans, mortgages, investments, taxes, and more

16 tools

💱

🔥 Trending

Currency Converter

Convert between different currencies with real-time exchange rates. Free, accurate, and up-to-date Converters for 150+ currencies.

Finance

🟡 Medium

📊 Monthly searches165.0K

currency converterexchange rate convertermoney converter+7 more

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🏦

Loan Calculator

Calculate monthly payments, interest, and amortization schedules

Finance

🟢 Easy

📊 Monthly searches74.0K

loanmortgagepayment+3 more

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🧾

🔥 Trending

Tax Calculator

Calculate income tax and estimate tax liability

Finance

🟡 Medium

📊 Monthly searches156.0K

taxincomecalculator+3 more

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🏠

🔥 Trending

Mortgage Calculator

Calculate mortgage payments, taxes, insurance, and total costs

Finance

🟢 Easy

📊 Monthly searches380.0K

mortgagehome loanpayment+3 more

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🚗

🔥 Trending

Auto Loan Calculator

Calculate car loan payments, interest costs, and financing options

Finance

🟢 Easy

📊 Monthly searches180.0K

auto loancar loanvehicle financing+1 more

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💳

🔥 Trending

Credit Card Payoff Calculator

Calculate time and cost to pay off credit card debt

Finance

🟢 Easy

📊 Monthly searches195.0K

credit carddebt payoffpayment calculator+1 more

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💰

🔥 Trending

Savings Calculator

Calculate savings growth with compound interest and regular deposits

Finance

🟢 Easy

📊 Monthly searches220.0K

savingscompound interestdeposit+1 more

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🏛️

401(k) Calculator

Calculate 401(k) contributions and retirement savings

Finance

🟢 Easy

📊 Monthly searches85.0K

401kretirementsavings+1 more

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Unit & Measurement

Convert between different units of measurement

9 tools

🌡️

🔥 Trending

Fahrenheit to Celsius Converter

Convert temperatures between Fahrenheit and Celsius with accurate formulas and common temperature references

Unit & Measurement

🟢 Easy

📊 Monthly searches245.0K

fahrenheit to celsius convertertemperature converterf to c converter+7 more

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⚖️

🔥 Trending

Pounds to Kg Converter

Convert weight between pounds and kilograms with precise calculations and body weight references

Unit & Measurement

🟢 Easy

📊 Monthly searches198.0K

pounds to kg converterlbs to kg converterweight converter+7 more

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🌡️

🔥 Trending

Celsius to Fahrenheit Converter

Convert temperatures from Celsius to Fahrenheit with weather conditions and temperature ranges

Unit & Measurement

🟢 Easy

📊 Monthly searches189.0K

celsius to fahrenheit converterc to f convertertemperature converter celsius+7 more

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📏

🔥 Trending

Feet to Meters Converter

Convert length between feet and meters with height references and architectural measurements

Unit & Measurement

🟢 Easy

📊 Monthly searches185.0K

feet to meters converterft to m converterheight converter+7 more

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📏

🔥 Trending

Meters to Feet Converter

Convert length between meters and feet with height references and architectural measurements

Unit & Measurement

🟢 Easy

📊 Monthly searches165.0K

meters to feet converterm to ft converterheight converter+7 more

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📐

🔥 Trending

Inches to CM Converter

Convert length between inches and centimeters with screen sizes and measurement references

Unit & Measurement

🟢 Easy

📊 Monthly searches156.0K

inches to cm converterinch to cm converterinches centimeters converter+7 more

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📐

🔥 Trending

CM to Inches Converter

Convert centimeters to inches instantly with our accurate length conversion calculator. Free online tool for cm to inches conversion with formula and examples.

Unit & Measurement

🟢 Easy

📊 Monthly searches142.0K

cm to inchescentimeters to inchescm inches conversion+5 more

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⚖️

🔥 Trending

Kg to Pounds Converter

Convert kilograms to pounds instantly with our accurate weight conversion calculator. Free online tool for kg to lbs conversion with formula and examples.

Unit & Measurement

🟢 Easy

📊 Monthly searches175.0K

kg to poundskg to lbskilograms to pounds+5 more

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File & Media

Convert file formats and process media files

2 tools

📄

🔥 Trending

PDF to Word Converter

Convert PDF files to editable Word documents

File & Media

🔴 Advanced

📊 Monthly searches201.0K

pdfworddoc+3 more

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🖼️

JPG to PNG Converter

Convert JPG images to PNG format with transparency support

File & Media

🟢 Easy

📊 Monthly searches89.0K

jpgjpegpng+3 more

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Color & Design

Color Converters and design utilities

3 tools

🎨

RGB to HEX Converter

Convert RGB color values to HEX codes and vice versa with color preview

Color & Design

🟢 Easy

📊 Monthly searches85.0K

rgbhexcolor+5 more

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🌈

Color Picker Tool

Professional color picker with HSL controls, palettes and color history

Color & Design

🟢 Easy

📊 Monthly searches78.0K

colorpickerhsl+5 more

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🎨

HEX to RGB Converter

Convert HEX color codes to RGB values and vice versa with color preview and validation

Color & Design

🟢 Easy

📊 Monthly searches67.0K

hexrgbcolor+5 more

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Health & Fitness

Health calculators and fitness tools

1 tools

⚖️

🔥 Trending

BMI Calculator

Calculate Body Mass Index and get health recommendations. Free BMI calculator with weight status interpretation and health tips.

Health & Fitness

🟢 Easy

📊 Monthly searches135.0K

bmi calculatorbody mass index calculatorbmi chart calculator+7 more

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auto

Engine performance, drivetrain, and auto calculations

18 tools

🏎️

Carburetor CFM Calculator

Calculate the correct carburetor CFM for your engine based on displacement and modification level. Professional carburetor sizing tool for optimal performance.

auto

🟢 Easy

📊 Monthly searches12.0K

carburetor cfm calculatorcarburetor sizing calculatorengine airflow calculator+7 more

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⚙️