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    Free Unit Converters 2026 – cm to Inches, kg to lbs, °C to °F & More

    Instant unit converters for every measurement you need. Convert length, weight, temperature, volume, speed, area, and more — with bidirectional conversion and quick-reference tables.

    ✓ 27 All Online Calculators✓ No login required✓ Mobile Ready

    Most searched in this category

    cm to Incheskg to lbsCelsius to FahrenheitMiles to kmUnit Converter

    Most Popular

    📏
    cm → in🔥

    Convert centimeters to inches instantly. Bidirectional with quick reference table.

    ⚖️
    kg → lbs🔥

    Convert kilograms to pounds instantly. Also shows stone and ounces.

    🌡️
    °C → °F🔥

    Convert Celsius, Fahrenheit and Kelvin instantly. Three-way temperature converter.

    🛣️
    miles → km

    Convert miles to kilometers instantly. Great for road trips, running and driving.

    🫙
    L → gal

    Convert liters to US gallons, UK gallons, cups and fluid ounces.

    📐
    ft → m

    Convert feet to meters instantly with a bidirectional converter and quick reference table.

    ⚖️
    oz → g

    Convert ounces to grams and grams to ounces instantly.

    🚗
    mph → km/h

    Convert miles per hour to kilometers per hour instantly.

    All Unit Converters (27)

    📏cm → in⚖️kg → lbs🌡️°C → °F🛣️miles → km🫙L → gal📐ft → m⚖️oz → g🚗mph → km/h🏠ft² → m²📏in → cm⚖️lbs → kg🫙gal → L🏈yd → m🥛mL → fl oz🛣️km → miles⚖️g → oz🔥kJ to Calories📏cm to Feet⚖️kg to Stone🌡️°F to °C💧ft³ to Gallons⚖️lbs to oz🌾ha to Acres📶Data Transfer⚡Watts → Amps🔋kWh ↔ Joules⛽MPG ↔ L/100km

    Length Converters

    Convert centimeters to inches, meters to feet, miles to kilometers, and dozens more length conversions. All converters are bidirectional — type in either field to instantly get the result.

    Weight Converters

    Convert kilograms to pounds, stone to kg, ounces to grams, and more. Body weight calculators include stone and pounds format for UK users.

    Temperature Converters

    Convert Celsius, Fahrenheit, and Kelvin instantly. Our three-way temperature converter includes a quick reference table of common temperatures like body temperature, boiling point, and oven temperatures.

    Volume & Area Converters

    Convert liters to gallons, cups to milliliters, square feet to square meters, and acres to hectares. Perfect for cooking, construction, and international measurement conversions.

    Unit Converters Guides

    All Guides →
    How to Convert Currency – Exchange Rates Explained
    Learn how currency conversion works, how exchange rates are calculated, and how to get the best rate when sending money abroad.
    How to Convert Units – Metric to Imperial & Back
    Learn how to convert between metric and imperial units for length, weight, temperature, and volume. Includes conversion factors and worked examples.
    How to Convert Celsius to Fahrenheit – Temperature Conversion
    Convert Celsius to Fahrenheit with the exact formula and a quick estimation trick. Includes common temperature references and a printable conversion chart.
    How to Convert Kilograms to Pounds – Weight Conversion Guide
    Convert kilograms to pounds with the exact formula and quick mental math tricks. Includes common weight references and a kg to lbs conversion chart.

    Popular Unit Converters Calculations

    Frequently searched calculations — answered instantly with formulas and step-by-step explanations.

    100 cm to inches70 kg to pounds1 mile to km1 gallon to liters100 mph to km/h

    Unit Converters Formula Reference

    All Formulas →
    Celsius to Fahrenheit Formula – °C to °F ConversionKilograms to Pounds Formula – kg to lbs Conversion

    Frequently Asked Questions

    How do I convert centimetres to inches?▼
    Divide centimetres by 2.54. Formula: inches = cm ÷ 2.54. For example: 30 cm ÷ 2.54 = 11.81 inches. Or multiply cm by 0.3937. Our cm to inches converter shows both formulas.
    How do I convert kilograms to pounds?▼
    Multiply kilograms by 2.20462. Formula: lbs = kg × 2.20462. For example: 70 kg × 2.20462 = 154.32 lbs. The exact conversion factor is 1 kg = 2.20462262 lbs.
    How do I convert Celsius to Fahrenheit?▼
    °F = (°C × 9/5) + 32. For example: 37°C = (37 × 1.8) + 32 = 98.6°F (body temperature). To convert Fahrenheit to Celsius: °C = (°F − 32) × 5/9.
    How do I convert miles to kilometres?▼
    Multiply miles by 1.60934. Formula: km = miles × 1.60934. For example: 100 miles × 1.60934 = 160.93 km. Our miles to km converter handles both directions instantly.
    How do I convert litres to gallons?▼
    1 US gallon = 3.78541 litres. Formula: gallons = litres ÷ 3.78541. For UK/Imperial gallons: 1 Imperial gallon = 4.54609 litres. Always check which gallon type applies — US and UK gallons differ by ~20%.
    ✓ Documented formulas — all tools use standard industry formulas✓ Updated regularly — content reviewed 2026✓ Used by thousands daily✓ Free — no sign-up required

    See also

    🔢 Mathematics🏗️ Construction⚙️ Engineering