Convert pounds to grams

Content last reviewed:2026-09-30

A pound is exactly 453.59237 grams. One and a half pounds, or 1.5 lb, is therefore 680.39 g. Type a weight in pounds and the grams appear as you type. The field also accepts pounds with ounces, such as 7 lb 6 oz, and a switch below the fields selects the metric pound of half a kilogram.

Pounds (lb)

You can also type a weight as 7 lb 6 oz.

Grams

Pound type

International: 453.59237 g, the pound on US labels and in recipes. Metric: 500 g, or half a kilogram, the meaning of Pfund in Germany and livre in France.

How do you convert pounds to grams?

Multiply the number of pounds by 453.59237 to get grams. One and a half pounds, or 1.5 lb, comes to 680.39 grams.

Formula: grams = pounds × 453.59237

The factor is exact, because since 1 July 1959 the international pound has been defined as 0.45359237 kilograms[1]. For mental arithmetic, 454 is close enough. It gives a result nine hundredths of a percent above the exact one.

Fractions of a pound use the same factor. A quarter pound weighs 113.4 grams. Half a pound comes to 226.8 grams. Three quarters of a pound is 340.19 grams.

Divide the result by 1,000 to get kilograms. One and a half pounds is 0.68 kilograms that way. With large weights this step keeps the number short. Two hundred pounds is 90,718.47 grams, or 90.72 kilograms.

To go the other way, divide by the same factor. The grams to pounds converter writes a weight in grams as pounds and ounces.

What is a pound, and what is a gram?

The pound is a unit of mass in the imperial and US customary systems. The international pound weighs exactly 453.59237 grams[2]. Its symbol, lb, comes from the Latin libra[1].

NIST, the US national measurement institute, divides the pound into 16 ounces[2]. An ounce therefore weighs 28.35 grams, and the ounces to grams converter handles any number of them. The same pound also equals 7,000 grains, which the grains to grams converter turns into grams.

A gram is one thousandth of a kilogram, the base unit of mass in the SI. A kilogram is 2.2046 pounds, and the kilograms to pounds converter handles larger weights.

In the United Kingdom the pound still appears on goods, next to the metric figure. The Weights and Measures Act 1985 allows an imperial quantity when the metric quantity is the more prominent one and the imperial figure is printed in characters no larger than the metric one[3].

Black weight plate on a barbell with 45 LBS cast into it — The mass on this weight plate is cast in pounds: 45 LBS. In grams that is 20,411.66 g, or 20.41 kg. Photo: Russell Moore, Unsplash.

How many grams are in a given number of pounds?

The rows start at a hundredth of a pound and end at two hundred pounds. They include fractions of a pound, whole pounds and large weights such as body weight in pounds. The kilograms column helps where the result in grams runs to five or six digits.

Pounds	Grams	Kilograms
0.01 lb	4.54 g	0.0045 kg
0.02 lb	9.07 g	0.0091 kg
0.05 lb	22.68 g	0.0227 kg
0.1 lb	45.36 g	0.0454 kg
0.2 lb	90.72 g	0.0907 kg
0.25 lb	113.4 g	0.1134 kg
0.3 lb	136.08 g	0.1361 kg
0.4 lb	181.44 g	0.1814 kg
0.5 lb	226.8 g	0.2268 kg
0.6 lb	272.16 g	0.2722 kg
0.7 lb	317.51 g	0.3175 kg
0.75 lb	340.19 g	0.3402 kg
0.8 lb	362.87 g	0.3629 kg
0.9 lb	408.23 g	0.4082 kg
1 lb	453.59 g	0.4536 kg
1.1 lb	498.95 g	0.499 kg
1.2 lb	544.31 g	0.5443 kg
1.25 lb	566.99 g	0.567 kg
1.3 lb	589.67 g	0.5897 kg
1.4 lb	635.03 g	0.635 kg
1.5 lb	680.39 g	0.6804 kg
1.6 lb	725.75 g	0.7257 kg
1.7 lb	771.11 g	0.7711 kg
1.75 lb	793.79 g	0.7938 kg
1.8 lb	816.47 g	0.8165 kg
2 lb	907.18 g	0.9072 kg
2.2 lb	997.9 g	0.9979 kg
2.25 lb	1,020.58 g	1.0206 kg
2.5 lb	1,133.98 g	1.134 kg
2.75 lb	1,247.38 g	1.2474 kg
3 lb	1,360.78 g	1.3608 kg
3.5 lb	1,587.57 g	1.5876 kg
4 lb	1,814.37 g	1.8144 kg
4.5 lb	2,041.17 g	2.0412 kg
5 lb	2,267.96 g	2.268 kg
6 lb	2,721.55 g	2.7216 kg
7 lb	3,175.15 g	3.1751 kg
8 lb	3,628.74 g	3.6287 kg
9 lb	4,082.33 g	4.0823 kg
10 lb	4,535.92 g	4.5359 kg
11 lb	4,989.52 g	4.9895 kg
12 lb	5,443.11 g	5.4431 kg
15 lb	6,803.89 g	6.8039 kg
16 lb	7,257.48 g	7.2575 kg
20 lb	9,071.85 g	9.0718 kg
22 lb	9,979.03 g	9.979 kg
25 lb	11,339.81 g	11.3398 kg
30 lb	13,607.77 g	13.6078 kg
35 lb	15,875.73 g	15.8757 kg
40 lb	18,143.69 g	18.1437 kg
44 lb	19,958.06 g	19.9581 kg
50 lb	22,679.62 g	22.6796 kg
55 lb	24,947.58 g	24.9476 kg
60 lb	27,215.54 g	27.2155 kg
75 lb	34,019.43 g	34.0194 kg
80 lb	36,287.39 g	36.2874 kg
100 lb	45,359.24 g	45.3592 kg
115 lb	52,163.12 g	52.1631 kg
125 lb	56,699.05 g	56.699 kg
150 lb	68,038.86 g	68.0389 kg
160 lb	72,574.78 g	72.5748 kg
200 lb	90,718.47 g	90.7185 kg

The 2.2 lb row gives 997.9 grams, just short of a kilogram. A full kilogram is 2.2046 pounds. Rounding that factor to 2.2 therefore gives a result two tenths of a percent low when you convert kilograms to pounds.

How many grams are in the pounds and ounces on a US label?

US labeling law requires net weight in pounds, with any remainder in ounces or in fractions of a pound[4]. Next to it, with some exceptions, the law also requires the metric quantity. The FDA food labeling guide shows this with the example Net wt 1 lb 8 oz (680g)[5]. The table converts weights written this way, from one ounce to ten pounds.

Label weight	Grams	Decimal pounds
1 oz	28.35 g	0.0625 lb
2 oz	56.7 g	0.125 lb
4 oz	113.4 g	0.25 lb
6 oz	170.1 g	0.375 lb
8 oz	226.8 g	0.5 lb
10 oz	283.5 g	0.625 lb
12 oz	340.19 g	0.75 lb
14 oz	396.89 g	0.875 lb
15 oz	425.24 g	0.9375 lb
1 lb	453.59 g	1 lb
1 lb 4 oz	566.99 g	1.25 lb
1 lb 8 oz	680.39 g	1.5 lb
1 lb 12 oz	793.79 g	1.75 lb
2 lb	907.18 g	2 lb
2 lb 8 oz	1,133.98 g	2.5 lb
3 lb	1,360.78 g	3 lb
4 lb	1,814.37 g	4 lb
5 lb	2,267.96 g	5 lb
10 lb	4,535.92 g	10 lb

The FDA example gives 680 grams. The exact result is 680.39 grams, so the figure on that label is rounded to the nearest gram.

How much does a pound weigh in different countries and systems?

The first two values are in use today, and the switch below the converter fields works with both. The international pound is used in the United States[2] and defined in Canadian law[6]. The metric pound is half a kilogram: that is what Pfund means in Germany[7] and livre means in everyday French[8], and Colombian law gives the libra the same value[9]. The remaining rows describe historical pounds.

Kind of pound	Mass	Where and when
International pound	453.59237 g	today: US and Canada
Metric pound	500 g	today: everyday speech in Germany and France, Colombian law
Vienna pound	560.06 g	former Viennese measure
Czech libra	513 g	historical Bohemia
Paris livre (poids de marc)	489.5 g	France before metrication
Castilian libra	460.093 g	Spain and its former American territories
Arrátel	457.8 g	Portugal and Brazil
New Polish pound	405.504 g	Congress Poland
Troy pound	373.2417216 g	precious metals, no longer in general use
Tuscan libbra	339.54 g	Tuscany
Roman libra	327.168 g	ancient Rome
Neapolitan libbra	320.75899 g	Naples

The historical values come from the Wikipedia editions of those countries: Portuguese[10], Spanish[11], Czech[12], Italian[13], French[8] and Polish[14]. The troy pound divides into 12 troy ounces[2]. Precious metals are weighed in troy ounces today[1], and the grams to ounces converter handles them with a switch for the kind of ounce.

Which number formats does this converter handle?

Paste the number the way you have it: with a comma, with a point, with a space between thousands, as a fraction or next to a unit symbol. The field reads every one of these formats and converts it for you, and the table shows exactly what it does with each. The converter computed the results itself.

What you type	What the converter shows	How we read it
2.5	1133.98 g	The decimal point from the numeric keypad, written the way English writes it
2,5	1133.98 g	A comma pasted from a market that writes decimals that way is read as a decimal point, so the result is the same
1,500	680388.56 g	Three digits follow the comma, so we read it as a thousands separator: the field holds one thousand five hundred. A note under the field shows the other possible reading, 1.5.
3/4	340.19 g	We work the fraction out ourselves, so there is no need to turn it into a decimal first
3½	1587.57 g	The ½ character copied from a recipe or a label is added to the number in front of it
2.5 lb	1133.98 g	A unit symbol pasted along with the number is no trouble: we take the number and leave the symbol out

Which pound should you choose in the converter?

The switch below the fields decides whether a pound weighs 453.59 or 500 grams. The choice depends on where the number you are converting comes from.

A recipe or package from the US, the UK or Canada
Keep the international pound, because that is the value of the pound on labels in those countries. A recipe calling for 3 lb of potatoes comes to 1,360.78 grams.
A weight written in pounds and ounces
Type it into the Pounds (lb) field as it is, for example 5 lb 8 oz. The converter turns the ounces into part of a pound and returns 2,494.76 grams. Pounds with ounces work with the international pound.
A German or French recipe
Set the Pound type switch to Metric (500 g). In such a recipe, ein Pfund Mehl or une livre de farine means 500 grams of flour, and two of those pounds make a full kilogram.

Convert other units to Grams

kg to g mg to g mcg to g grains to g carats to g oz to g tons to grams

Convert Pounds (lb) to other units

lb to oz lb to kg lb to stone lbs to tons

Sources

Pound (mass) — Wikipedia
NIST Handbook 44 (2023), Appendix C. General Tables of Units of Measurement — National Institute of Standards and Technology
Weights and Measures Act 1985, section 8 — legislation.gov.uk, The National Archives
15 U.S. Code § 1453. Requirements of labeling — Legal Information Institute, Cornell Law School
A Food Labeling Guide. Guidance for Industry — U.S. Food and Drug Administration
Weights and Measures Act (R.S.C., 1985, c. W-6), Schedule II — Government of Canada, Justice Laws Website
Pfund — Wikipedia
Livre (unité) — Wikipedia
Sistema Internacional de Unidades — Superintendencia de Industria y Comercio (Colombia)
Arrátel — Wikipedia
Libra (unidad de masa) — Wikipedia
Libra (jednotka hmotnosti) — Wikipedia
Libbra — Wikipedia
Funt (masa) — Wikipedia

Every figure in the tables was computed from the unit definitions and checked arithmetically before publication. Historical values and the names of local units come from the sources listed above.

Content last reviewed: September 30, 2026 · written and checked by the Arteon team

Frequently asked questions about converting pounds to grams

How many grams are in one pound?

One pound is 453.59237 grams. The value is exact, because the pound is defined as 0.45359237 kilograms. Rounded to two decimal places it is 453.59 grams, and to the nearest gram 454 grams.

Which pound does the converter use by default?

The international pound of 453.59237 grams. The switch below the fields changes it to the metric pound of 500 grams, which matches the German Pfund and the French livre.

Is a UK pound the same as a US pound?

Yes. NIST states that the avoirdupois pound in Great Britain is the same unit as the one used in the United States. Both weigh 453.59237 grams.

Can I type a fraction of a pound, such as 1/3?

Yes. The field accepts simple and mixed fractions, such as 1/3, 3/4 or 2 1/2. A third of a pound comes to 151.2 grams.

How many grams are in a pound of butter or a pound of flour?

A pound of butter and a pound of flour both weigh 453.59 grams, because the pound is a unit of mass. Every ingredient in a US recipe converts with the same factor.

Arteon free tool screenshot: Convert pounds to grams

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