Free Unit Converter & Calculator - UnitConverterAndCalculator

Welcome to UnitConverterAndCalculator, the most comprehensive free online platform for instant unit conversions and calculations. Our suite of 86+ converters and professional calculators help millions of users worldwide - from students and teachers to engineers, scientists, contractors, and everyday users who need quick, accurate measurements.

Why Choose UnitConverterAndCalculator?

• 86+ Unit Converters - The most extensive collection of conversion tools available online, covering length, weight, temperature, volume, pressure, energy, power, and dozens more categories
• Professional Calculators - Loan calculators for 10 different loan types, mortgage calculators for 8 mortgage types, GPA calculators for multiple grading scales
• 100% Free - No registration, no hidden fees, no limitations
• Instant Results - Real-time conversion as you type
• Mobile Friendly - Works perfectly on phones, tablets, and desktops
• Multi-Language Support - Available in English, Spanish, French, German, Italian, Portuguese, Dutch, Japanese, and Hindi

Popular Conversions

• 1 kilometer = 0.621371 miles | 1 mile = 1.60934 kilometers
• 1 kilogram = 2.20462 pounds | 1 pound = 0.453592 kilograms
• 1 meter = 3.28084 feet | 1 foot = 0.3048 meters
• 1 centimeter = 0.393701 inches | 1 inch = 2.54 centimeters
• 0°C = 32°F | 100°C = 212°F
• 1 liter = 0.264172 US gallons | 1 US gallon = 3.78541 liters
• 1 ounce = 28.3495 grams | 1 gram = 0.035274 ounces

Common Unit Converters

Our most popular everyday unit converters. Convert length, weight, temperature, volume, area, speed, time, and more with instant results.

Length Converter

Convert between kilometers, miles, meters, feet, centimeters, inches, yards, nautical miles, and more. Perfect for travel distances, construction measurements, and everyday use. Common conversions: km to miles, meters to feet, cm to inches, yards to meters.

Weight Converter

Convert between kilograms, pounds, grams, ounces, tons, stone, and more. Essential for cooking, shipping, fitness tracking, and scientific work. Common conversions: kg to lbs, grams to ounces, tons to pounds, stone to kg.

Temperature Converter

Convert between Celsius, Fahrenheit, Kelvin, and Rankine. Used for weather, cooking, scientific research, and HVAC. Common conversions: Celsius to Fahrenheit, Fahrenheit to Celsius, Kelvin to Celsius.

Volume Converter

Convert between liters, gallons, milliliters, fluid ounces, cups, pints, quarts, and cubic measurements. Essential for cooking, fuel, beverages, and scientific applications. Common conversions: liters to gallons, ml to oz, cups to ml.

Area Converter

Convert between square meters, square feet, acres, hectares, square kilometers, square miles, and more. Perfect for real estate, land measurement, and construction. Common conversions: sq ft to sq m, acres to hectares, sq km to sq miles.

Speed Converter

Convert between kilometers per hour, miles per hour, meters per second, knots, and feet per second. Used for travel, sports, aviation, and marine navigation. Common conversions: km/h to mph, m/s to km/h, knots to mph.

Time Converter

Convert between seconds, minutes, hours, days, weeks, months, years, and more. Useful for project planning, scheduling, and time calculations. Common conversions: hours to minutes, days to hours, weeks to days.

Pressure Converter

Convert between Pascal, bar, PSI, atmospheres, torr, and mmHg. Essential for engineering, weather, tire pressure, and scientific applications. Common conversions: PSI to bar, atm to Pascal, mmHg to kPa.

Engineering Unit Converters

Professional engineering conversion tools for force, torque, power, energy, and more. Essential for mechanical engineers, civil engineers, and technical professionals.

Force Converter

Convert between Newtons, pounds-force, kilogram-force, dynes, and kips. Used in structural engineering, physics, and mechanical design. Common conversions: N to lbf, kgf to N, kN to lbf.

Torque Converter

Convert between Newton-meters, pound-feet, kilogram-meters, and dyne-centimeters. Essential for automotive, mechanical engineering, and fastener specifications. Common conversions: Nm to lb-ft, kg-m to Nm.

Power Converter

Convert between Watts, kilowatts, horsepower, BTU/hour, and foot-pounds per second. Used for motors, engines, electrical systems, and HVAC. Common conversions: kW to HP, watts to BTU/h, HP to kW.

Energy Converter

Convert between Joules, calories, kilowatt-hours, BTU, electronvolts, and foot-pounds. Essential for physics, nutrition, electrical billing, and thermodynamics. Common conversions: kWh to Joules, calories to Joules, BTU to kWh.

Stress Converter

Convert between Pascal, MPa, GPa, PSI, and ksi. Critical for materials science, structural engineering, and mechanical design. Common conversions: MPa to PSI, GPa to ksi.

Thermal Unit Converters

Specialized converters for heat, thermal conductivity, thermal expansion, and temperature-related measurements. Essential for HVAC engineers, physicists, and materials scientists.

Heat Transfer Converter

Convert between BTU/hour, Watts, kilowatts, calories/second, and tons of refrigeration. Used for HVAC systems, heat exchangers, and thermal analysis.

Thermal Conductivity Converter

Convert between W/(m·K), BTU/(h·ft·°F), and cal/(s·cm·°C). Essential for insulation calculations and materials selection.

Specific Heat Converter

Convert between J/(kg·K), BTU/(lb·°F), and cal/(g·°C). Used in thermodynamics and heat capacity calculations.

Electrical Unit Converters

Comprehensive electrical conversion tools for voltage, current, resistance, capacitance, inductance, and more. Essential for electricians, electronics engineers, and electrical professionals.

Voltage Converter

Convert between volts, millivolts, kilovolts, and megavolts. Used for electrical systems design and troubleshooting.

Current Converter

Convert between amperes, milliamperes, microamperes, and kiloamperes. Essential for circuit design and electrical safety.

Resistance Converter

Convert between ohms, kilohms, megohms, and milliohms. Used for electronics and electrical component selection.

Capacitance Converter

Convert between farads, microfarads, nanofarads, and picofarads. Essential for electronics design and filter calculations.

Inductance Converter

Convert between henries, millihenries, and microhenries. Used for inductor selection and RF circuit design.

Electric Charge Converter

Convert between coulombs, milliampere-hours, ampere-hours, and faradays. Essential for battery capacity and electrochemistry.

Magnetism Unit Converters

Specialized converters for magnetic field strength, magnetic flux, and permeability. Essential for physics, electronics, and magnetic materials research.

Magnetic Field Strength Converter

Convert between Tesla, Gauss, milliTesla, and Weber per square meter. Used for MRI machines, motors, and magnetic sensors.

Magnetic Flux Converter

Convert between Webers, Maxwell, and milliWebers. Essential for electromagnetic calculations and transformer design.

Radiology Unit Converters

Medical and scientific radiation unit converters. Essential for radiologists, nuclear medicine, radiation therapy, and health physics professionals.

Radiation Dose Converter

Convert between Gray, Rad, Sievert, and Rem. Used for radiation therapy planning and safety monitoring.

Radioactivity Converter

Convert between Becquerel, Curie, and disintegrations per second. Essential for nuclear medicine and radiation safety.

Radiation Exposure Converter

Convert between Roentgen, Coulombs per kilogram, and milliroentgen. Used for X-ray and radiation monitoring.

Fluids Unit Converters

Specialized converters for fluid dynamics, viscosity, flow rate, and hydraulic calculations. Essential for chemical engineers, hydraulic engineers, and fluid mechanics specialists.

Viscosity Converter

Convert between Pascal-second, Poise, centipoise, and Stokes. Used for lubricants, paints, and fluid flow calculations.

Flow Rate Converter

Convert between liters per minute, gallons per minute, cubic meters per hour, and cubic feet per second. Essential for pumps, pipes, and HVAC systems.

Density Converter

Convert between kg/m³, g/cm³, lb/ft³, and lb/gal. Used for materials science and fluid mechanics.

Fuel Unit Converters

Fuel economy and efficiency converters for automotive and transportation applications. Compare fuel consumption across different measurement systems.

Fuel Economy Converter

Convert between miles per gallon (MPG), kilometers per liter, liters per 100 km, and miles per liter. Essential for comparing vehicle fuel efficiency across countries.

Fuel Consumption Converter

Convert fuel consumption rates for trip planning and cost calculations. Compare US MPG, UK MPG, and metric fuel economy.

Light & Sound Unit Converters

Converters for luminous intensity, illumination, sound intensity, and frequency. Essential for lighting designers, acoustical engineers, and AV professionals.

Luminous Intensity Converter

Convert between candela, lumen, lux, and foot-candle. Used for lighting design and photography.

Sound Level Converter

Convert between decibels, bels, and neper. Essential for acoustical engineering and audio production.

Frequency Converter

Convert between Hertz, kilohertz, megahertz, and gigahertz. Used for radio, telecommunications, and electronics.

Mechanical Unit Converters

Mechanical engineering converters for velocity, acceleration, angular measurements, and momentum. Essential for mechanical engineers and physics applications.

Angular Velocity Converter

Convert between radians per second, RPM, degrees per second, and revolutions per minute. Used for rotating machinery and motor specifications.

Angular Acceleration Converter

Convert between rad/s², deg/s², and RPM/s. Essential for rotational dynamics calculations.

Momentum Converter

Convert between kg·m/s, lb·ft/s, and N·s. Used for physics and collision analysis.

Math & Science Unit Converters

Scientific and mathematical converters for data storage, angles, scientific notation, and number systems. Essential for scientists, programmers, and students.

Data Storage Converter

Convert between bytes, kilobytes, megabytes, gigabytes, terabytes, and petabytes. Essential for computing and data management. Supports both decimal (SI) and binary (IEC) units.

Angle Converter

Convert between degrees, radians, gradians, and arc minutes/seconds. Used for trigonometry, navigation, and surveying.

Number Base Converter

Convert between decimal, binary, octal, and hexadecimal number systems. Essential for programming and computer science.

Medical Unit Converters

Healthcare and medical converters for blood glucose, medication dosages, and body measurements. Essential for healthcare professionals and patients.

Blood Glucose Converter

Convert between mg/dL and mmol/L for blood sugar readings. Essential for diabetes management across different countries.

BMI Calculator

Calculate Body Mass Index from height and weight in metric or imperial units. Includes health category interpretation.

Medication Dosage Converter

Convert medication doses between different units and calculate weight-based dosing. Essential for pharmacists and healthcare providers.

Everyday Converters

Practical converters for cooking, crafts, and daily life. Convert recipes, clothing sizes, and common household measurements.

Cooking Measurement Converter

Convert between cups, tablespoons, teaspoons, milliliters, and fluid ounces. Essential for recipe conversion and international cooking.

Shoe Size Converter

Convert between US, UK, EU, and Asian shoe sizes for men, women, and children. Essential for online shopping.

Paper Size Converter

Convert between A series (A4, A3, A5), US Letter, Legal, and other paper formats. Essential for printing and design.

Free Loan Calculator - Calculate Monthly Payments for Any Loan Type

Our comprehensive loan calculator helps you estimate monthly payments, total interest, and amortization schedules for 10 different loan types. Make informed borrowing decisions with detailed payment breakdowns.

Supported Loan Types

• Personal Loan Calculator - Calculate payments for unsecured personal loans with fixed rates
• Auto Loan Calculator - Estimate car loan payments including new and used vehicle financing
• Student Loan Calculator - Plan education financing with federal and private loan calculations
• Business Loan Calculator - Calculate commercial loan payments for small business financing
• Home Equity Loan Calculator - Estimate HELOC and home equity loan payments
• Payday Loan Calculator - Understand the true cost of short-term loans
• Consolidation Loan Calculator - Compare debt consolidation savings
• Medical Loan Calculator - Plan healthcare financing payments
• Wedding Loan Calculator - Budget for wedding financing
• Vacation Loan Calculator - Calculate travel financing costs

Loan Calculator Features

• Monthly payment calculation with principal and interest breakdown
• Total interest paid over the life of the loan
• Amortization schedule showing payment details by month
• Compare different loan terms and interest rates
• Export payment schedule to PDF

How to Use the Loan Calculator

Enter your loan amount, annual interest rate (APR), and loan term in months or years. The calculator instantly shows your monthly payment, total payments, and total interest. View the full amortization schedule to see how each payment is split between principal and interest.

Free Mortgage Calculator - Estimate Home Loan Payments

Calculate monthly mortgage payments, total interest, and amortization schedules for 8 different mortgage types. Plan your home purchase with accurate payment estimates including taxes and insurance.

Supported Mortgage Types

• Fixed-Rate Mortgage Calculator - Calculate payments for 15, 20, and 30-year fixed mortgages
• Adjustable-Rate Mortgage (ARM) Calculator - Estimate payments for 5/1, 7/1, and 10/1 ARMs
• FHA Loan Calculator - Calculate FHA mortgage payments with mortgage insurance
• VA Loan Calculator - Estimate Veterans Affairs home loan payments
• Jumbo Loan Calculator - Calculate payments for high-value mortgages
• Interest-Only Mortgage Calculator - Understand interest-only payment periods
• USDA Loan Calculator - Calculate rural development loan payments
• Refinance Calculator - Compare refinancing savings and break-even points

Mortgage Calculator Features

• Monthly payment with principal, interest, taxes, and insurance (PITI)
• Private mortgage insurance (PMI) calculation for low down payments
• Full amortization schedule
• Total cost of homeownership over the loan term
• Down payment and closing cost estimates

Free GPA Calculator - Calculate Your Grade Point Average

Calculate your cumulative GPA, semester GPA, or weighted GPA using any grading scale. Supports US 4.0 scale, international grading systems, and weighted/honors courses.

GPA Calculator Features

• Standard GPA Calculator - Calculate unweighted GPA on the 4.0 scale
• Weighted GPA Calculator - Include honors, AP, and IB course weighting
• Cumulative GPA Calculator - Calculate overall GPA across multiple semesters
• Semester GPA Calculator - Calculate GPA for individual terms
• Grade Converter - Convert letter grades to GPA points

Supported Grading Scales

• US 4.0 Scale (A=4.0, B=3.0, C=2.0, D=1.0, F=0)
• Plus/Minus Grading (A+=4.0, A=4.0, A-=3.7, B+=3.3, etc.)
• Weighted GPA (AP/Honors courses add 0.5-1.0 points)
• Percentage to GPA conversion
• International grade conversions

How to Calculate GPA

Enter your courses with credit hours and letter grades. The calculator multiplies each grade point by credit hours, sums the quality points, and divides by total credit hours. For weighted GPA, honors and AP courses receive additional grade points.

Free QR Code Generator - Create Custom QR Codes Instantly

Generate free QR codes for URLs, text, WiFi networks, contact information, email, phone numbers, and more. Download in PNG, SVG, or PDF formats. No registration required.

QR Code Types Supported

• URL QR Code - Create QR codes that link to any website or web page
• Text QR Code - Encode plain text messages in QR format
• WiFi QR Code - Share WiFi network credentials (SSID and password)
• vCard QR Code - Create contact cards with name, phone, email, and address
• Email QR Code - Generate QR codes that open email compose with pre-filled recipient
• Phone QR Code - Create QR codes that dial phone numbers
• SMS QR Code - Generate QR codes that open text message compose
• Location QR Code - Share GPS coordinates or addresses

QR Code Generator Features

• Instant QR code generation as you type
• Customizable size (small, medium, large, extra large)
• Custom foreground and background colors
• High-quality PNG, SVG, and PDF downloads
• Error correction levels for damaged code scanning
• 100% free with unlimited generations

How to Create a QR Code

Select your QR code type, enter the content (URL, text, WiFi credentials, etc.), customize the size and colors if desired, then download your QR code. The QR code is generated instantly and can be used for print materials, websites, business cards, and more.

Unit Conversion Charts & Reference Tables

Printable conversion charts and quick reference tables for the most common unit conversions. Perfect for classrooms, workshops, and offices.

Length Conversion Chart

• 1 inch = 2.54 centimeters = 25.4 millimeters
• 1 foot = 12 inches = 30.48 centimeters = 0.3048 meters
• 1 yard = 3 feet = 36 inches = 0.9144 meters
• 1 mile = 5,280 feet = 1,760 yards = 1.60934 kilometers
• 1 kilometer = 1,000 meters = 0.621371 miles = 3,280.84 feet
• 1 meter = 100 centimeters = 39.3701 inches = 3.28084 feet

Weight Conversion Chart

• 1 ounce = 28.3495 grams
• 1 pound = 16 ounces = 453.592 grams = 0.453592 kilograms
• 1 kilogram = 2.20462 pounds = 35.274 ounces = 1,000 grams
• 1 ton (US) = 2,000 pounds = 907.185 kilograms
• 1 metric ton = 1,000 kilograms = 2,204.62 pounds
• 1 stone = 14 pounds = 6.35029 kilograms

Temperature Conversion Chart

• Celsius to Fahrenheit: °F = (°C × 9/5) + 32
• Fahrenheit to Celsius: °C = (°F - 32) × 5/9
• 0°C = 32°F (freezing point of water)
• 100°C = 212°F (boiling point of water)
• 37°C = 98.6°F (normal body temperature)
• -40°C = -40°F (same in both scales)

Volume Conversion Chart

• 1 teaspoon = 5 milliliters
• 1 tablespoon = 3 teaspoons = 15 milliliters
• 1 cup = 16 tablespoons = 236.588 milliliters
• 1 pint = 2 cups = 473.176 milliliters
• 1 quart = 2 pints = 4 cups = 946.353 milliliters
• 1 gallon (US) = 4 quarts = 3.78541 liters
• 1 liter = 1,000 milliliters = 0.264172 gallons = 33.814 fluid ounces

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Disclaimer

Our conversion tools and calculators are provided for informational purposes only. While we strive for accuracy, results should be verified for critical applications. Financial calculations are estimates and should not replace professional financial advice.

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