Convert weight and mass between different units instantly. Perfect for cooking, fitness tracking, shipping, and scientific calculations.
While we commonly say "weight converter," we're actually converting mass. Weight is the force exerted by gravity on an object, while mass is the amount of matter in an object. Your mass stays the same whether you're on Earth, the Moon, or floating in space, but your weight changes based on gravitational pull. For everyday purposes, we use "weight" to mean mass.
1 kilogram (kg) = 1,000 grams. Most common unit for body weight, food items, and general measurements.
1 gram (g) = 1,000 milligrams. Used for small items, ingredients, medication.
1 metric ton = 1,000 kilograms. Used for vehicles, large shipments, industrial materials.
1 pound (lb) = 16 ounces = 453.592 grams. Standard US body weight and grocery measurement.
1 ounce (oz) = 28.35 grams. Used for small food portions, precious metals, mail.
1 stone (st) = 14 pounds = 6.35 kg. Common in UK/Ireland for body weight.
1 US ton = 2,000 pounds = 907.185 kg. Different from metric ton (1,000 kg).
Track weight loss/gain across different scales. US scales show pounds, European scales show kilograms. Converting helps when traveling, using fitness apps from different countries, or following international diet plans. A 150 lb person weighs 68 kg.
International recipes use different units. European recipes list flour in grams; American recipes use ounces or cups (weight-based baking is more accurate). Converting ensures recipe success: 1 cup flour ≈ 120-125g.
Postal services worldwide use different weight limits. USPS uses ounces/pounds for domestic, kilograms for international. Knowing conversions helps calculate shipping costs and avoid overage fees.
Gold, silver, and gems measured in troy ounces (31.1g) or grams. Understanding conversions helps value jewelry and compare prices across markets.
Medication doses in milligrams (mg), patient weight in kg or lbs. Accurate conversion critical for dosing, especially pediatrics where doses scale with body weight.
Scientific work uses metric (grams, kg). Engineering may use imperial depending on country. Converting between systems essential for international collaboration.
1 kg = 2.205 pounds (remember: 1 kg ≈ 2.2 lbs)
1 lb = 0.454 kg (remember: 1 lb ≈ 0.45 kg)
1 oz = 28.35 grams (remember: 1 oz ≈ 28-30g)
1 stone = 14 lbs = 6.35 kg
100 g = 3.527 oz (common food portion)
500 g = 1.1 lbs (approximately half kilo ≈ 1 pound)
7.5 lbs = 3.4 kg. Newborn weights typically 2.5-4.5 kg (5.5-10 lbs).
150 lbs = 68 kg. Average adult weight varies globally: US average ~180 lbs (82 kg), Europe ~70 kg (154 lbs).
250g = 8.82 oz ≈ 2 cups. Precision matters in baking—use weight for best results.
50 lbs = 22.7 kg. Most airlines allow 50 lbs (23 kg) checked bag. International flights may differ.
5 kg = 11 lbs. Important for calculating shipping rates and weight limits.
Use Digital Scales: More accurate than analog. Look for 0.1g precision for small items, 0.1 lb for body weight.
Tare Function: Zero out container weight before measuring ingredients. Essential for cooking accuracy.
Calibrate Regularly: Check scale accuracy with known weights (dumbbells, coins, etc.). Scales drift over time.
Stable Surface: Place scales on hard, flat surface. Carpet or uneven surfaces give false readings.
Multiple Readings: Weigh yourself 3 times, take average. Body weight fluctuates pound or two daily (water, food, clothing).