Kilograms to pounds converter

The three conversions that cover 99% of cooking use

1 kg = 2.2046 lbs. 1 lb = 0.4536 kg = 453.6 g. 1 oz = 28.35 g. Memorize 2.2, 453, and 28 and you're done. For quick mental math, doubling kilograms and adding 10% is within 0.2% of exact — a 5kg roast × 2 + 10% = 11 lbs (actual: 11.02 lbs).

Cooking uses both systems awkwardly. US meat is sold in pounds; flour and chocolate are sold in both pounds and grams depending on brand; European recipes are 100% metric; Asian recipes often use grams even in translated English versions. Fluency in both saves you constant calculator trips.

The weights every cook should know

• 1 oz = 28g (useful for portioning proteins)
• 4 oz = 113g (half stick of butter; small chicken breast)
• 8 oz = 227g (stick of butter; average chicken breast)
• 1 lb = 454g (ground beef package; whole chicken breasts pack)
• 2 lb = 908g (family pack ground beef)
• 5 lb = 2.27 kg (standard Costco chicken breast pack)
• 10 lb = 4.54 kg (turkey, small)
• 14 lb = 6.35 kg (average Thanksgiving turkey)
• 25 kg = 55 lb (Costco rice bag)

Why European recipes feel "wrong" to American cooks

A classic Italian ragù calls for "500g ground beef + 200g pancetta + 1 onion + 2 carrots + 100g tomato paste." Translating naively: 1.1 lb beef, 0.44 lb pancetta, 1 onion, 2 carrots, 3.5 oz tomato paste. Why does this work? Because European recipes assume weight-based precision. American translations often round ("1 lb beef") and the dish loses its intended ratio. Cooking with a scale makes these recipes bulletproof.

Protein portioning by weight

• Small steak (lunch portion): 150-180g (5-6 oz)
• Medium steak (standard): 225g (8 oz)
• Large steak (hearty dinner): 340g (12 oz)
• Chicken breast (average): 170-225g (6-8 oz)
• Fish fillet (standard): 170g (6 oz)
• Pork chop: 170-225g (6-8 oz)
• Ground meat per person (burger, meatball): 113g (4 oz)

Baking ingredients by weight

Most baking pro recipes give weights in grams. Common ingredient weights per common volume measure:

• 1 cup flour = 125g = 4.4 oz
• 1 cup sugar = 200g = 7 oz
• 1 stick butter = 113g = 4 oz
• 1 egg (large, without shell) = 50g = 1.75 oz
• 1 cup milk = 240g = 8.5 oz
• 1 tbsp salt = 18g
• 1 packet yeast = 7g = 0.25 oz

The metric scale advantage

A scale with a "g" mode has 1g precision. A scale with "oz" mode typically displays 0.125oz precision (8th of an ounce). For small quantities — yeast, salt, cocoa — grams are more precise. For larger quantities (roasts, bread), either works.

Switch your kitchen scale to grams by default. Any serious baking recipe will work. Converting 500g to "approximately 17.6 oz" and then trying to hit that on an oz scale adds error.

Common grocery weights to know

• Standard butter stick (US): 113g / 4oz
• European butter block: 250g / 8.8oz
• Chocolate bar (Lindt, Ghirardelli): 100g / 3.5oz
• Large chocolate baking bar: 226g / 8oz
• Bag of AP flour (King Arthur 5-lb): 2.27kg
• Bag of sugar (Domino 4-lb): 1.81kg
• Can of tomatoes (standard): 411g / 14.5oz
• Can of beans (drained): 255g / 9oz
• Rotisserie chicken (Costco): 1.4kg / ~3lb

Converting meat cuts

When a European recipe calls for "1 kg beef for stew," that's 2.2 lbs. American packaged stew meat is typically sold in 1-lb or 1.5-lb packages — buy two 1-lb packs or ask the butcher for 2.2 lbs. Same for whole cuts: a 1.5 kg pork roast is 3.3 lbs.

Infant and pet food math (tangential but useful)

If you're cooking for dogs or measuring infant portions, precision matters more. A dog food recipe for a 15kg dog says 200g protein + 150g carbs + 50g vegetables per day. Converting to a 33-lb dog: same amounts (the equation uses body weight as input). American recipes for a 30-lb dog often give pet-store cups, which is less precise.

The airport weigh (suitcase and shipping)

If you're shipping food gifts: most carriers have 50-lb limits (23 kg). A case of wine (12 bottles) weighs ~18 kg / 40 lbs. Olive oil 5L jug: 4.5 kg / 10 lbs. Vanilla beans in bulk are shockingly light.

When the gram-to-oz conversion matters most

• Precision baking (macarons, meringues, croissants) — always grams
• Coffee brewing (1g precision impacts taste) — grams
• Small quantities of spices — grams (a recipe saying "5g cardamom" is more accurate than "2 tsp")
• Body-composition or diet tracking — grams
• Chemistry-heavy baking (chocolate work, fondant) — grams

Related: cups to grams, butter stick converter, ml to cups, oz to ml.

The practical rule

Learn to think in grams for baking (125g flour/cup, 200g sugar/cup, 113g butter/stick) and in pounds/ounces for meat and produce (because that's how they're sold). You don't need to convert constantly — you need to be dual-fluent, picking the system each context uses. A good scale has both modes with a toggle button. The 10-second habit of zeroing the bowl, pouring to the target weight, zeroing again eliminates conversion from the workflow entirely.

Worked examples across real shopping scenarios

European cookbook calls for 1.8 kg boneless pork shoulder for carnitas feeding 10. Math: 1.8 × 2.205 = 3.97 lb. At the US butcher you ask for "4 pounds pork shoulder" — the 0.03 lb difference is 14 grams, less than a teaspoon. Ignore it.

Second example: marathon training plan says athlete should weigh 68 kg. On the bathroom scale that's 68 × 2.205 = 149.9 lb. Scale reads 153 lb — you're 3.1 lb (1.4 kg) over target. Third example: shipping a care package, max 22 lb. That's 22 / 2.205 = 9.98 kg. The post office scale says 10.2 kg — 0.5 lb over, will be rejected or surcharged. Fourth example: turkey recipe says 5 kg bird cooks 3 hours at 165°C. 5 kg = 11 lb. At 325°F (the 165°C equivalent) an 11 lb bird runs 2:45 to 3:15 — recipe math holds.

Scales worth buying in 2026

• Kitchen (dual-unit, 5 kg capacity): OXO Good Grips 11 lb ($50), Escali Primo P115 ($30), MyWeigh KD-8000 ($55 — bakers' favorite, counts in grams of baker's percentage).
• Bathroom (body weight, kg/lb toggle): Withings Body+ ($100), Renpho Elis 1 ($30), Eufy Smart Scale P2 Pro ($45).
• Postal/shipping (up to 50 lb): Accuteck ShipPro W-8250 ($30), Ultraship 55 ($35).
• Lab/reloading (0.01 g precision): American Weigh AWS-100 ($20) for spices and tea, Gemini-20 ($25) for chocolate tempering.

Unit context cheat sheet — when each system wins

Frequently asked questions

Is 1 kg exactly 2.2 lb? No — it's 2.2046226 lb. Using 2.2 underestimates by 0.2%. On a 50 kg suitcase that's 0.23 lb — airline scales won't care, but shipping tariffs might.

How do I convert kg to lb in my head? Double the kg, add 10%. 15 kg × 2 = 30, + 10% = 33 lb (actual: 33.07). Works within 0.2% at all sizes.

How do I convert lb to kg in my head? Divide by 2, subtract 10%. 50 lb / 2 = 25, – 10% = 22.5 kg (actual: 22.68). Close enough for everything except athletic weigh-ins.

Why do Olympic barbells use kg? International Weightlifting Federation standard since 1928. 20 kg bar, plates in 25/20/15/10/5/2.5/1.25/0.5/0.25 kg. Americans who train Olympic lifts translate in their heads.

Is body weight measured differently medically? Every medication dose, IV fluid rate, and anesthesia calculation in modern medicine uses kg. US hospitals weigh patients in kg even when the patient thinks in lb. If your doctor writes lb, they converted for your benefit.

Does altitude change my weight reading? Yes, slightly. Gravity at Denver (5,280 ft) is 0.02% weaker than at sea level — a 180 lb person weighs 180.04 lb less, undetectable on any consumer scale. Mass in kg doesn't change; weight in N does. For our purposes, ignore this.

How accurate are grocery-store scales? Legal-for-trade scales are certified to 0.1% or 1 graduation, whichever is larger. A 5 lb chicken on a produce scale could legally read 4.99 to 5.01 lb. For home cooking, buy to the nearest 0.1 lb or 50 g.

What about metric tons vs US tons? 1 metric ton = 1,000 kg = 2,205 lb. 1 US short ton = 2,000 lb = 907 kg. 1 UK long ton = 2,240 lb = 1,016 kg. For bulk flour orders or large-format catering this matters.

Do I need a $100 smart scale? For body weight tracking, no — a $30 Renpho hits 0.2 lb repeatability and does the same Wi-Fi sync. For kitchen, the OXO 11 lb at $50 out-performs most $150 "smart" kitchen scales because the sensor matters more than the app.