Pounds to Stone Converter (lb to st)

How to convert pounds to stone

To convert pounds to stone, multiply the number of pounds by 0.07143 (or divide by 14).

Example: 180 lb = 12.857 st.

Handy for converting North American weights for British forms and apps.

Pounds to Stone conversion chart

lb	st
0.25 lb	0.01786 st
0.5 lb	0.03571 st
0.75 lb	0.05357 st
1 lb	0.07143 st
1.5 lb	0.10714 st
2 lb	0.14286 st
2.5 lb	0.17857 st
3 lb	0.21429 st
3.5 lb	0.25 st
4 lb	0.28571 st
4.5 lb	0.32143 st
5 lb	0.35714 st
6 lb	0.42857 st
7 lb	0.5 st
8 lb	0.57143 st
9 lb	0.64286 st
10 lb	0.71429 st
11 lb	0.78571 st
12 lb	0.85714 st
13 lb	0.92857 st
14 lb	1 st
15 lb	1.071 st
16 lb	1.143 st
18 lb	1.286 st
20 lb	1.429 st
24 lb	1.714 st
25 lb	1.786 st
30 lb	2.143 st
32 lb	2.286 st
35 lb	2.5 st
40 lb	2.857 st
45 lb	3.214 st
50 lb	3.571 st
55 lb	3.929 st
60 lb	4.286 st
64 lb	4.571 st
65 lb	4.643 st
70 lb	5 st
75 lb	5.357 st
80 lb	5.714 st
85 lb	6.071 st
90 lb	6.429 st
100 lb	7.143 st
110 lb	7.857 st
120 lb	8.571 st
125 lb	8.929 st
128 lb	9.143 st
150 lb	10.714 st
175 lb	12.5 st
180 lb	12.857 st
200 lb	14.286 st
220 lb	15.714 st
250 lb	17.857 st
300 lb	21.429 st
400 lb	28.571 st
500 lb	35.714 st
750 lb	53.571 st
1,000 lb	71.429 st

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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