UFOZoo

Unit Converter — Length, Weight, Temperature, Volume, Area

Convert between metric and imperial units for length, weight, temperature, volume, and area. Instant, accurate, and easy to use. Browser-based.

Features

  • ✓Convert between metric and imperial units for length, weight, temperature, volume, and area
  • ✓Instant conversion as you type — no buttons to click
  • ✓Support for common units: meters, feet, kilograms, pounds, Celsius, Fahrenheit, liters, gallons, and more
  • ✓Precise calculations with up to 6 significant figures
  • ✓Clear unit symbols and names for easy identification
  • ✓Swap units with one click to reverse the conversion
  • ✓Copy results to clipboard for use in other applications
  • ✓Works offline — all calculations happen in your browser

How to Use

  1. 1Select a category (Length, Weight, Temperature, Volume, or Area) from the dropdown.
  2. 2Enter a value in the input field. The result updates instantly.
  3. 3Choose the source unit and target unit using the dropdowns.
  4. 4Click the swap button (⇄) to reverse the conversion direction.
  5. 5Click the copy button to copy the result to your clipboard.
  6. 6Convert body weight from kilograms to pounds — enter 70 kg to see 154.3 lb, useful for fitness tracking across different measurement systems.
  7. 7Convert a cooking recipe from metric to imperial — enter 250 mL of milk to see it equals ~8.5 fl oz for US measuring cups.
  8. 8Convert room temperature from Celsius to Fahrenheit — enter 22°C to see 71.6°F for international weather comparisons.
  9. 9Convert fabric or floor area from square meters to square feet — enter 50 m² to see ~538 ft² for home renovation planning.
  10. 10Convert fuel volume from liters to gallons — enter 50 L (typical car tank) to see ~13.2 US gallons for cross-border refueling.

Frequently Asked Questions

What units are supported?

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Length: mm, cm, m, km, in, ft, yd, mi. Weight: mg, g, kg, t, oz, lb. Temperature: °C, °F, K. Volume: mL, L, m³, gal, qt, pt, fl oz. Area: mm², cm², m², km², ha, in², ft², ac.

How accurate are the conversions?

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All conversions use precise conversion factors defined by international standards. Results are displayed with up to 6 significant figures, which is sufficient for most practical applications.

Why is temperature conversion different?

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Temperature scales have different zero points (Celsius: water freezing at 0°C, Fahrenheit: water freezing at 32°F, Kelvin: absolute zero at 0K). This requires offset calculations in addition to ratio conversions.

Can I convert between metric and imperial units?

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Yes. The tool supports both metric (SI) units and imperial/US customary units. You can convert between any combination, such as meters to feet, kilograms to pounds, or liters to gallons.

Is my data sent to a server?

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No. All calculations happen entirely in your browser using JavaScript. Your input values are never transmitted over the network. The tool works offline after the page loads.

How do I convert Celsius to Fahrenheit manually?

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The formula is: °F = (°C × 9/5) + 32. For 100°C: (100 × 9/5) + 32 = 212°F. For a quick estimate: double the Celsius and add 30. 20°C → 20×2+30 = 70°F (exact is 68°F). The tool provides exact conversions instantly.

Why does the US use imperial units while most of the world uses metric?

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The US customary system evolved from British imperial units used during colonization. The Metric System was standardized in France (1799) and adopted globally, but the US never fully converted due to the cost and complexity of changing infrastructure, manufacturing, and education.

How many ounces are in a cup, pint, quart, and gallon?

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US Customary: 1 cup = 8 fl oz, 1 pint = 2 cups = 16 fl oz, 1 quart = 2 pints = 32 fl oz, 1 gallon = 4 quarts = 128 fl oz. UK/Imperial differs: 1 UK pint = 20 fl oz, 1 UK gallon = 160 fl oz. The tool uses US measurements by default.

What is the difference between a metric ton and a US ton?

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A metric tonne (t) = 1,000 kg = 2,204.6 lb. A US short ton = 2,000 lb = 907.2 kg. A UK long ton = 2,240 lb = 1,016 kg. The tool supports metric tonnes (t) and US pounds (lb). For most conversions, 1 t ≈ 1.102 US tons.

How do I convert height from feet/inches to centimeters?

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1 foot = 30.48 cm. For 5'10": (5 × 30.48) + (10 × 2.54) = 152.4 + 25.4 = 177.8 cm. Use the Length category, enter 5 in ft and 10 in in, then convert to cm. The tool handles the compound conversion automatically.

Can I convert between all area units?

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Yes. The tool supports mm², cm², m², km², hectares (ha), in², ft², and acres (ac). Common conversions: 1 acre = 43,560 ft² = 4,047 m². 1 hectare = 10,000 m² = 2.47 acres. Sports fields, land plots, and construction plans often need these conversions.

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