✅ Copied!

Related Tools — Math, Finance & More

⚖️Length & Weightkm, miles, kg, lbs🌡️Temperature°C, °F, K💱CurrencyLive FX rates📐Area & Volumem², ft², liters🔢Math CalcAdvanced calculations📐Percentages% increase/decrease💰EMI CalculatorLoan calculations📊Business CalcGST & markup🕐Time & DateAge, countdown❤️Health CalcBMI uses kg & cm

About CalcPlex's Free Unit Converter

CalcPlex's free online unit converter is a fast, ad-free tool that lets you convert between hundreds of measurement units across 8 categories. Whether you need to convert kilometers to miles for a road trip, kilograms to pounds for a recipe, Celsius to Fahrenheit for the weather, or USD to PKR for currency exchange, every answer is just one click away — no signup required.

The live currency converter pulls real-time exchange rates for 160+ world currencies, including USD, EUR, GBP, PKR, INR, SAR, AED, JPY, and more. All other converters use precision conversion factors aligned with SI (International System of Units) standards.

Length Converter

km, miles, feet, inches, meters, cm, mm, nautical miles, light years

Weight Converter

kg, lbs, grams, ounces, stone, metric tons, carats

Temperature Converter

Celsius, Fahrenheit, Kelvin, Rankine with formula display

Currency Converter

160+ live currencies — USD, EUR, GBP, PKR, INR, SAR, AED & more

Area Converter

sq meters, sq feet, acres, hectares, sq miles, sq yards

Volume Converter

liters, gallons, cups, pints, quarts, cubic meters, fl oz

Speed Converter

km/h, mph, m/s, knots, Mach number

Data Converter

bits, bytes, KB, MB, GB, TB, PB — binary & decimal

Frequently Asked Questions

Quick answers to the most common unit conversion questions — optimised for Google's People Also Ask and Featured Snippets.

How do I convert kilometers to miles?

Multiply kilometers by 0.621371 to get miles. For example:

  • 1 km = 0.621 miles
  • 5 km = 3.107 miles
  • 10 km = 6.214 miles
  • 100 km = 62.137 miles

Use the Length Converter tab above for instant results.

How do I convert Celsius to Fahrenheit?

Use the formula: °F = (°C × 9/5) + 32. Common conversions:

  • 0°C = 32°F (water freezes)
  • 20°C = 68°F (comfortable room temperature)
  • 37°C = 98.6°F (normal body temperature)
  • 100°C = 212°F (water boils)

Select the Temp tab above to convert any temperature instantly.

How many pounds is 1 kilogram?

1 kilogram = 2.20462 pounds. Quick reference:

  • 1 kg = 2.205 lbs
  • 5 kg = 11.023 lbs
  • 70 kg = 154.32 lbs (average adult weight)
  • 1 lb = 0.4536 kg
What is today's USD to PKR exchange rate?

CalcPlex fetches live exchange rates every time the page loads. Open the Currency tab above to see the real-time USD to PKR rate alongside 160+ other world currencies. Rates are powered by a free public API and update automatically.

How do I convert GB to MB?

In binary (IEC): 1 GB = 1,024 MB. In decimal (SI): 1 GB = 1,000 MB. Quick reference:

  • 1 GB = 1,024 MB = 1,048,576 KB
  • 1 TB = 1,024 GB = 1,048,576 MB

Use the Data tab to convert between bits, bytes, KB, MB, GB, TB, and PB.

How many square feet are in an acre?

1 acre = 43,560 square feet = 4,047 square meters = 0.4047 hectares. The Area tab above handles all common area units including sq ft, sq meters, acres, hectares, and sq miles.

Is CalcPlex free to use?

Yes — 100% free, no account needed, no ads on the converter. All 8 converters on this page are available to anyone, on any device, at no cost. CalcPlex also offers free finance, health, math, education, time & date, and business calculators.

How fast is the speed of sound in km/h and mph?

The speed of sound in dry air at 20°C is approximately 343 m/s = 1,235 km/h = 767 mph = 1,125 ft/s. This is Mach 1. Use the Speed tab to convert m/s, km/h, mph, knots, and Mach number.