Pounds to Ounces Converter (lb to oz)

How to convert pounds to ounces

To convert pounds to ounces, multiply the number of pounds by 16.

Example: 2.5 lb = 40 oz.

Useful for baby weights, packages and recipes.

Common lb to oz conversions

1 lb = 16 oz
2 lb = 32 oz
3 lb = 48 oz
5 lb = 80 oz
7 lb = 112 oz
8 lb = 128 oz
10 lb = 160 oz
15 lb = 240 oz
20 lb = 320 oz
25 lb = 400 oz
50 lb = 800 oz
100 lb = 1,600 oz
120 lb = 1,920 oz
130 lb = 2,080 oz
140 lb = 2,240 oz
150 lb = 2,400 oz
160 lb = 2,560 oz
180 lb = 2,880 oz
200 lb = 3,200 oz
220 lb = 3,520 oz
250 lb = 4,000 oz

Pounds to Ounces conversion chart

lb	oz
0.25 lb	4 oz
0.5 lb	8 oz
0.75 lb	12 oz
1 lb	16 oz
1.5 lb	24 oz
2 lb	32 oz
2.5 lb	40 oz
3 lb	48 oz
3.5 lb	56 oz
4 lb	64 oz
4.5 lb	72 oz
5 lb	80 oz
6 lb	96 oz
7 lb	112 oz
8 lb	128 oz
9 lb	144 oz
10 lb	160 oz
11 lb	176 oz
12 lb	192 oz
13 lb	208 oz
14 lb	224 oz
15 lb	240 oz
16 lb	256 oz
18 lb	288 oz
20 lb	320 oz
24 lb	384 oz
25 lb	400 oz
30 lb	480 oz
32 lb	512 oz
35 lb	560 oz
40 lb	640 oz
45 lb	720 oz
50 lb	800 oz
55 lb	880 oz
60 lb	960 oz
64 lb	1,024 oz
65 lb	1,040 oz
70 lb	1,120 oz
75 lb	1,200 oz
80 lb	1,280 oz
85 lb	1,360 oz
90 lb	1,440 oz
100 lb	1,600 oz
110 lb	1,760 oz
120 lb	1,920 oz
125 lb	2,000 oz
128 lb	2,048 oz
130 lb	2,080 oz
140 lb	2,240 oz
150 lb	2,400 oz
160 lb	2,560 oz
175 lb	2,800 oz
180 lb	2,880 oz
200 lb	3,200 oz
220 lb	3,520 oz
250 lb	4,000 oz
300 lb	4,800 oz
400 lb	6,400 oz
500 lb	8,000 oz
750 lb	12,000 oz
1,000 lb	16,000 oz

Metric vs. U.S. customary units

The United States uses U.S. customary units — inches, feet, miles, pounds, gallons and degrees Fahrenheit — for most everyday purposes. Canada officially adopted the metric system in the 1970s, so road signs, weather forecasts, gas pumps and food labels use kilometers, degrees Celsius, liters and grams. In practice many Canadians still use feet and inches for height, pounds for body weight and square feet for homes, which is why conversions come up constantly on both sides of the border.

Exact conversion factors

Since 1959 the inch, foot, yard, mile and pound have been defined in metric terms, so these conversions are exact, not approximations:

1 inch = 2.54 cm exactly, so 1 foot = 30.48 cm and 1 mile = 1.609344 km.
1 pound = 0.45359237 kg exactly; 1 ounce = 28.349523125 g.
1 U.S. gallon = 3.785411784 liters. The imperial gallon used in the U.K. is larger: 4.54609 liters.
1 acre = 4,046.8564224 m², and 1 hectare = 10,000 m² (about 2.471 acres).

Temperature is different because the scales have different zero points: °F = °C × 9/5 + 32 and °C = (°F − 32) × 5/9. Water freezes at 0 °C (32 °F) and boils at 100 °C (212 °F) at sea level, and −40 is the same in both scales.

Quick mental shortcuts

Kilometers to miles: multiply by 0.6 (100 km ≈ 60 miles; the exact figure is 62.1).
Kilograms to pounds: double it and add 10% (70 kg → 140 + 14 = 154 lb).
Celsius to Fahrenheit: double it and add 30 for a rough estimate (20 °C → 70 °F; the exact answer is 68 °F).
Liters to U.S. gallons: divide by 4 for a quick estimate (40 L ≈ 10 gallons; exactly 10.57).

Cooking and recipe conversions

U.S. recipes measure by volume — cups, tablespoons and teaspoons — while Canadian and most international recipes use milliliters and grams. A U.S. cup is about 237 mL, but Canadian "metric" measuring cups hold 250 mL, so the difference adds up in baking. For flour, sugar and butter, weighing in grams is more accurate than cups because the density of each ingredient differs.

Popular conversions

Pick a conversion below for a dedicated page with the formula, worked examples and a complete conversion chart.

Tips for accurate conversions

Keep full precision until the final step and round only the answer — rounding intermediate numbers can add noticeable errors, especially in recipes, construction and engineering. Always check which gallon, ounce or ton a source means: U.S. and imperial units share names but not sizes, and a "fluid ounce" measures volume while an "ounce" of weight measures mass. For temperatures, remember that a temperature difference converts differently from a temperature reading: a change of 10 °C equals a change of 18 °F, without adding 32.

Popular unit conversions

Frequently asked questions

How many centimeters are in an inch?

Exactly 2.54 centimeters. To convert inches to centimeters, multiply by 2.54; to convert centimeters to inches, divide by 2.54.

How do I convert kg to pounds?

Multiply kilograms by 2.20462. For example, 70 kg × 2.20462 = 154.3 lb.

What is the formula for Celsius to Fahrenheit?

Multiply by 9/5 (1.8) and add 32. For example, 25 °C × 1.8 + 32 = 77 °F.

Is a U.S. gallon the same as a Canadian gallon?

No. Canada sells gas by the liter, but when gallons are mentioned in Canada they are sometimes imperial gallons (4.546 L), which are about 20% larger than U.S. gallons (3.785 L).

How many square feet are in a square meter?

About 10.764 square feet. A 1,000 sq ft home is roughly 92.9 m².

Sources & methodology

This calculator was last reviewed on November 2, 2026. Figures are based on the following official and primary sources:

NIST – Handbook 44, Appendix C: General Tables of Units of Measurement

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