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Unit converter — fast & accurate
Pick a category, enter a value, get the answer instantly. Everything runs in your browser.
Quick answer: 1 inch = 2.54 cm exactly, 1 mile = 1.60934 km, 1 pound = 0.453592 kg, 1 ounce = 28.3495 g. For temperature: °F = °C × 9/5 + 32, and kelvin = °C + 273.15. Type any value above — every conversion updates instantly, computed locally in your browser.
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About this unit converter
This converter covers the units people search for most: length (meters, kilometers, miles, feet, inches…), weight (kilograms, pounds, ounces…) and temperature (°C, °F, kelvin).
- Length: 1 mile = 1.60934 km · 1 inch = 2.54 cm
- Weight: 1 lb = 0.453592 kg · 1 oz = 28.3495 g
- Temperature: °F = °C × 9/5 + 32 · K = °C + 273.15
Results update as you type — no button needed.
FAQ
How many cm are in an inch?
Exactly 2.54 cm per inch, by international definition.
How do I convert pounds to kg?
Multiply pounds by 0.453592. For example, 150 lb ≈ 68.04 kg.
How do I convert Fahrenheit to Celsius?
Subtract 32, then multiply by 5/9. For example, 98.6°F = 37°C.
Is this converter accurate?
Yes — it uses exact international conversion factors and computes locally in your browser.