How many tonnes are in 1 pound?

1 lb equals 0.00045359237 t. This is an exact conversion factor defined by NIST.

How do I convert pounds to tonnes?

Multiply the value in lb by the conversion factor. For example, 10 lb = 0.0045359237 t. Use our calculator above for instant results.

Is the pounds to tonnes conversion exact?

Yes, this conversion is mathematically exact based on the international definition of these units (NIST SP 811).

Can I convert pounds to tonnes offline?

Yes! OmniConvert runs entirely in your browser — no internet connection needed after the page loads. Your data never leaves your device, ensuring complete privacy.

What is the difference between pounds and tonnes?

Pounds (lb) and Tonnes (t) are both units of mass but belong to different measurement systems. 1 lb = 0.00045359237 t. Use the converter above to switch between them instantly.

Pounds to Tonnes (lb → t) — Free Online Converter

lb → t Reference Table

lb	t
0.001 lb	4.5359237e-7 t
0.002 lb	9.0718474e-7 t
0.003 lb	0.00000136077711 t
0.004 lb	0.00000181436948 t
0.005 lb	0.00000226796185 t
0.006 lb	0.00000272155422 t
0.007 lb	0.00000317514659 t
0.008 lb	0.00000362873896 t
0.009 lb	0.00000408233133 t
0.01 lb	0.0000045359237 t
0.02 lb	0.0000090718474 t
0.03 lb	0.0000136077711 t
0.04 lb	0.0000181436948 t
0.05 lb	0.0000226796185 t
0.06 lb	0.0000272155422 t
0.07 lb	0.0000317514659 t
0.08 lb	0.0000362873896 t
0.09 lb	0.0000408233133 t
0.1 lb	0.000045359237 t
0.2 lb	0.000090718474 t
0.3 lb	0.000136077711 t
0.4 lb	0.000181436948 t
0.5 lb	0.000226796185 t
0.6 lb	0.000272155422 t
0.7 lb	0.000317514659 t
0.8 lb	0.000362873896 t
0.9 lb	0.000408233133 t
1 lb	0.00045359237 t
1.5 lb	0.000680388555 t
2 lb	0.00090718474 t
2.5 lb	0.001133980925 t
3 lb	0.00136077711 t
3.5 lb	0.001587573295 t
4 lb	0.00181436948 t
4.5 lb	0.002041165665 t
5 lb	0.00226796185 t
5.5 lb	0.002494758035 t
6 lb	0.00272155422 t
6.5 lb	0.002948350405 t
7 lb	0.00317514659 t
7.5 lb	0.003401942775 t
8 lb	0.00362873896 t
8.5 lb	0.003855535145 t
9 lb	0.00408233133 t
9.5 lb	0.004309127515 t
10 lb	0.0045359237 t
11 lb	0.00498951607 t
12 lb	0.00544310844 t
13 lb	0.00589670081 t
14 lb	0.00635029318 t
15 lb	0.00680388555 t
16 lb	0.00725747792 t
17 lb	0.00771107029 t
18 lb	0.00816466266 t
19 lb	0.00861825503 t
20 lb	0.0090718474 t
25 lb	0.01133980925 t
30 lb	0.0136077711 t
35 lb	0.01587573295 t
40 lb	0.0181436948 t
45 lb	0.02041165665 t
50 lb	0.0226796185 t
55 lb	0.02494758035 t
60 lb	0.0272155422 t
65 lb	0.02948350405 t
70 lb	0.0317514659 t
75 lb	0.03401942775 t
80 lb	0.0362873896 t
85 lb	0.03855535145 t
90 lb	0.0408233133 t
95 lb	0.04309127515 t
100 lb	0.045359237 t
120 lb	0.0544310844 t
125 lb	0.05669904625 t
130 lb	0.0589670081 t
140 lb	0.0635029318 t
150 lb	0.0680388555 t
160 lb	0.0725747792 t
175 lb	0.07937866475 t
180 lb	0.0816466266 t
200 lb	0.090718474 t
225 lb	0.1020582833 t
250 lb	0.1133980925 t
275 lb	0.1247379018 t
300 lb	0.136077711 t
350 lb	0.1587573295 t
400 lb	0.181436948 t
450 lb	0.2041165665 t
500 lb	0.226796185 t
600 lb	0.272155422 t
700 lb	0.317514659 t
750 lb	0.3401942775 t
800 lb	0.362873896 t
900 lb	0.408233133 t
1000 lb	0.45359237 t
1200 lb	0.544310844 t
1250 lb	0.5669904625 t
1500 lb	0.680388555 t
1750 lb	0.7937866475 t
2000 lb	0.90718474 t
2500 lb	1.133980925 t
3000 lb	1.36077711 t
4000 lb	1.81436948 t
4500 lb	2.041165665 t
5000 lb	2.26796185 t
6000 lb	2.72155422 t
7000 lb	3.17514659 t
7500 lb	3.401942775 t
8000 lb	3.62873896 t
9000 lb	4.08233133 t
10000 lb	4.5359237 t
15000 lb	6.80388555 t
20000 lb	9.0718474 t
25000 lb	11.33980925 t
50000 lb	22.6796185 t
75000 lb	34.01942775 t
100000 lb	45.359237 t

Values based on NIST SP 811 conversion factors

Why Convert Pounds to Tonnes?

Converting between pounds (lb) and tonnes (t) is one of the most common mass conversions. Whether for engineering, cooking, travel, or science, knowing how to quickly convert lb to t saves time and prevents errors.

Mass conversions from lb to t are vital in culinary arts, logistics, and pharmaceutical industries. Professional chefs and home bakers rely on precise ingredient conversions to replicate international recipes — a slight variation in flour or leavening agents can ruin the texture of a dish. In global shipping, freight costs and vehicle load limits depend on accurate weight calculations to ensure safety and compliance with transport regulations. Furthermore, in healthcare and chemistry, dosage calculations must be exact; confusing mass units can lead to ineffective treatments or dangerous overdoses. Reliable mass conversion ensures consistency across borders and disciplines.

How to Convert Pounds to Tonnes

To convert pounds to tonnes, use the following formula:

t = lb × 0.00045359237

Example: 1 lb = 0.00045359237 t

For example, 5 lb = 0.00226796185 t, 10 lb = 0.0045359237 t, and 100 lb = 0.045359237 t. For larger values, 1000 lb = 0.45359237 t. Conversely, 1 t = 2204.622622 lb. Our calculator above performs this conversion instantly with full precision — no rounding errors.

Common Mistakes to Avoid

Mass vs Weight: confusing mass (kg) with weight/force (Newtons or lbs-force).
Ton variations: mixing up Short Ton (US), Long Ton (UK), and Metric Tonne.
Ounce confusion: confusing Ounces (weight) with Fluid Ounces (volume).

Pro Tips

Kitchen scales: Use the 'Tare' button to zero out container weight.
Water weight: 1 Liter of water weighs exactly 1 kg (at 4°C). Useful benchmark.
Conversion rule: To get kg from lbs, divide by 2.2 (approx halve it).

What is a Pound?

The pound (lb) is a unit of mass in the Imperial and US customary systems. The international avoirdupois pound is legally defined as exactly 0.45359237 kilograms since 1959.

Pounds are the primary unit of weight in the United States and are widely used in the UK for body weight. Common uses include groceries, body mass, and engineering in the US.

What is a Tonne?

The tonne (t), or metric ton, is a non-SI unit accepted for use with SI, equal to 1,000 kilograms (approximately 2,204.6 pounds).

Tonnes are used worldwide for measuring heavy loads, such as cargo shipping, vehicle weights, and industrial production (steel, grain, coal).

Pounds → Tonnes

Pounds to Tonnes Formula