Metric to Imperial Conversion Calculator
Convert any metric measurement to its imperial equivalent instantly. Select a measurement type — length, weight, volume or temperature — choose your metric unit, enter the value, and see all corresponding imperial values at once.
Measurement type
Metric unit
Primary imperial equivalent
- 1
Convert to metres
100 × 0.01 = 1 - 2
Feet
1 ÷ 0.3048 = 3.2808
How does this calculator work?
Select a measurement type and metric unit, enter your value, and get all imperial equivalents at once. Key factors: 1 cm = 0.3937 in, 1 kg = 2.2046 lb, 1 L = 33.814 US fl oz, °F = °C × 9/5 + 32. All conversions use exact international definitions.
Formula
How this is calculated
The conversion pipeline routes every metric input through an SI base unit — the metre for length, the kilogram for mass, and the litre for volume — and then divides by the exact international definition of each imperial unit. For length, 1 inch is defined as exactly 2.54 cm, from which all other imperial length units follow (1 ft = 12 in, 1 yd = 3 ft, 1 mi = 1 760 yd). For mass, 1 avoirdupois pound is exactly 0.45359237 kg, and 1 ounce is 1/16 lb. For volume, 1 US liquid gallon equals exactly 231 cubic inches (3.785411784 L), and US fluid ounces and cups derive from that.
Temperature is the one quantity that requires an offset, not just a scale factor. The Fahrenheit scale has a different zero than Celsius: the formula is °F = °C × 9/5 + 32 (and Kelvin = °C + 273.15). Water freezes at 0°C / 32°F and boils at 100°C / 212°F at standard atmospheric pressure.
All conversion factors used here are exact or carry at least nine significant digits, matching the precision of everyday and professional tasks. For high-stakes engineering or laboratory work, always verify values against the official NIST or BIPM definitions for your specific application and temperature conditions.
Frequently asked questions
For everyday use: 1 kg ≈ 2.2 lb, 1 km ≈ 0.62 miles, 1 litre ≈ 0.26 US gallons, and 0°C = 32°F. The centimetre-to-inch relationship (1 in = 2.54 cm exactly) is also widely needed for shopping and DIY.
For length and weight, yes — the international yard, pound and foot are identical. For volume they differ: a US gallon is 3.785 L while a UK (imperial) gallon is 4.546 L. A US fluid ounce is 29.57 mL; a UK fluid ounce is 28.41 mL. Always specify US or UK when dealing with liquid volumes.
The UK has officially adopted the metric system for trade and science but retains imperial units in everyday contexts: road distances in miles, body weight in stones and pounds, draught beer in pints. The mixture is cultural and legal — formal metrication began in the 1960s but some imperial units were never fully replaced.
TG we-Calculate Editorial Team. (2026). Metric to Imperial Conversion Calculator [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/metric-to-imperial-conversion-calculator
TG we-Calculate Editorial Team. "Metric to Imperial Conversion Calculator." TG we-Calculate. 2026. https://we-calculate.com/calculator/metric-to-imperial-conversion-calculator.
TG we-Calculate Editorial Team, "Metric to Imperial Conversion Calculator," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/metric-to-imperial-conversion-calculator
@misc{wecalculate_metric_to_imperial_conversion_calculator, title = {Metric to Imperial Conversion Calculator}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/metric-to-imperial-conversion-calculator}}, year = {2026}, note = {TG we-Calculate} }
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