This free unit converter switches between metric and imperial units in one click: length, weight and temperature. Convert kg to lbs, cm to inches, Celsius to Fahrenheit and dozens more pairs — instantly, using exact conversion factors.
Pick a category, enter a value, and choose your units. Every conversion runs in your browser, so nothing you type is uploaded or stored.
For quick lookups without touching the calculator, here are the anchor conversions people ask for most. Values are rounded for readability; the tool itself computes to full precision.
| Kilograms | Pounds (lbs) |
|---|---|
| 1 kg | 2.20 lbs |
| 5 kg | 11.02 lbs |
| 10 kg | 22.05 lbs |
| 25 kg | 55.12 lbs |
| 50 kg | 110.23 lbs |
| 75 kg | 165.35 lbs |
| 100 kg | 220.46 lbs |
Length conversions rest on one exact definition: 1 inch is exactly 2.54 centimeters. Everything else follows — a foot is 12 inches (30.48 cm), a yard is 3 feet, and a mile is 1,609.344 meters.
| From | To |
|---|---|
| 1 inch | 2.54 cm (exact) |
| 12 inches | 1 foot = 30.48 cm |
| 30 cm | 11.81 inches |
| 100 cm | 39.37 inches (1 meter) |
| 180 cm | 70.87 inches ≈ 5 ft 10.9 in |
| 1 mile | 1.60934 km |
| 5 km | 3.11 miles |
Temperature is the one category that needs a formula rather than a factor, because the scales start at different zeros. To convert Celsius to Fahrenheit: °F = °C × 9/5 + 32. To go back: °C = (°F − 32) × 5/9. Kelvin is simpler — it is Celsius shifted up: K = °C + 273.15.
| Celsius | Fahrenheit |
|---|---|
| 0 °C (freezing) | 32 °F |
| 10 °C | 50 °F |
| 20 °C (room temp) | 68 °F |
| 25 °C | 77 °F |
| 30 °C | 86 °F |
| 37 °C (body temp) | 98.6 °F |
| 100 °C (boiling) | 212 °F |
Cooking is where unit conversion gets the most daily use — and where it goes wrong most often, because volume and weight are different things. The single most searched kitchen pair is ml to cups: divide millilitres by 236.588 for US cups, so 500 ml ÷ 236.588 ≈ 2.11 cups. These reference values use the US cup (236.588 ml). Note that cups-to-grams depends on the ingredient’s density, so the gram figures below are for water-like liquids; flour, sugar and butter all differ.
| Volume | Millilitres | Ounces / grams (water) |
|---|---|---|
| ¼ cup | 59 ml | 2 fl oz ≈ 59 g |
| ⅓ cup | 79 ml | 2.7 fl oz ≈ 79 g |
| ½ cup | 118 ml | 4 fl oz ≈ 118 g |
| 1 cup | 237 ml | 8 fl oz ≈ 237 g |
| 2 cups | 473 ml | 16 fl oz ≈ 473 g |
| 1 oz (weight) | — | 28.35 g (exact: 28.3495 g) |
| 16 oz (1 lb) | — | 453.59 g |
Searching for a "unit converter weight" tool usually means one thing: kilograms one way, pounds the other, with grams and ounces for the small stuff. This converter covers all four — kilograms, grams, pounds and ounces — the units behind nearly every everyday weighing question, from the 23 kg (≈ 50.7 lbs) suitcase limit to 250 g (≈ 8.8 oz) of flour.
Weight conversions are exact multiplications, never estimates: pounds = kilograms × 2.20462, and ounces = grams ÷ 28.3495. Enter a value above and the answer appears instantly.
Convert 75 kg to lbs: multiply by 2.20462. 75 × 2.20462 = 165.35 lbs (rounded). That is the number airline scales, gym plates and recipe blogs are really talking about.
Convert 180 cm to feet and inches: divide by 2.54 to get 70.87 inches, then split into feet — 70.87 ÷ 12 = 5.91 feet, which is 5 feet plus 0.91 × 12 = 10.9 inches. Answer: 5 ft 10.9 in.
How many inches in a foot? Exactly 12 — by definition, and the basis of the whole imperial length system.
Approximations are fine for small talk, but they compound. Treating a kilogram as "about 2.2 pounds" is fine for luggage; treating an inch as "about 2.5 cm" across a construction project is how things stop fitting. This converter uses the internationally agreed definitions — 1 inch = 2.54 cm exactly, 1 pound = 0.45359237 kg exactly — so the answer is right no matter how large the numbers get.
The metric system (meters, kilograms, Celsius) is the global standard for science, medicine and almost every country’s daily life. Imperial and US customary units (feet, pounds, Fahrenheit) persist mainly in the United States — and in specific niches worldwide, like aviation altitudes (feet), screen sizes (inches) and precious metals (troy ounces).
That split is exactly why a unit converter earns its place in your bookmarks. A British recipe in grams meets an American cup measure; a European weather forecast in Celsius meets a Fahrenheit-thinking traveller; a 5K race meets a runner who thinks in miles. The converter above bridges those worlds in one tap — and the reference tables on this page cover the pairs people look up most.
Exactly 12 inches make one foot. It is a definition, not a measurement — and the foundation of the imperial length system (3 feet make a yard).
One mile is exactly 1.609344 kilometers. For quick mental math, multiply miles by 1.6 to get approximate kilometers.
Multiply kilograms by 2.20462. So 75 × 2.20462 = 165.35 lbs (rounded). The converter above does it instantly — pick Weight, enter 75, and choose kg to lbs.
°F = °C × 9/5 + 32. For example, 20°C × 9/5 + 32 = 68°F. To convert back: °C = (°F − 32) × 5/9.
Multiply ounces by 28.3495. One ounce is 28.3495 grams, so 8 oz is 226.8 g and 16 oz (one pound) is 453.59 g.
Very accurate — length and weight conversions use the exact internationally agreed definitions (for example 1 inch = 2.54 cm and 1 pound = 0.45359237 kg), and temperature uses the standard formulas. Results are shown with up to 4 decimal places.
Absolute zero (−273.15°C, −459.67°F, 0 K) is the coldest temperature physically possible, where molecular motion stops. A value colder than that cannot exist, so the tool shows a friendly error instead of a meaningless result.
Yes — free with no sign-up. Everything is calculated in your browser; your values are never sent to a server.
Written by the PagalHo Tools Team. Conversions use the internationally agreed definitions (1 in = 2.54 cm, 1 lb = 0.45359237 kg) and the standard temperature formulas. Rounded table values are labelled as rounded.
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