Weight Conversion Chart

What this page is

A set of five reference tables covering the conversions people look up most: kilograms to pounds, pounds to kilograms, stones to kilograms, grams to ounces and ounces to grams. Each covers a practical range at readable intervals, and the whole set downloads as a single CSV or prints on paper.

Why a chart rather than a converter

Because a printed table answers a range of questions at once and needs no device. A chart taped inside a kitchen cupboard or pinned in a workshop is faster than unlocking a phone, works when the connection does not, and lets a reader see neighbouring values — which is often what they actually want. The individual converters in this cluster handle one value precisely; this page handles a range approximately, and both have their place.

How the values are produced

Every figure is computed from the exact defined constants and rounded once, at the precision you select. That matters more than it sounds: charts built by copying values from other charts inherit and compound whatever rounding those used, and charts built on shortcut factors such as 28 grams to the ounce or 2.2 pounds to the kilogram run about one percent out. Nothing here is copied, and nothing uses a shortcut factor.

Why published charts disagree

Almost always because of where they round and which factor they started from. The 28-gram ounce is a US nutrition-labelling rounding that leaked into general use; it is 1.2 percent light, which is invisible in one row and cumulative across a column. The 2.2-pound kilogram is 0.2 percent low. Both are fine as mental shortcuts and wrong as the basis of a reference table, and a chart that reproduces them will disagree with an exact one by exactly those margins.

Choosing the precision

Two decimal places suits kitchen and body-weight use and is already finer than any domestic scale resolves. Higher settings are available and mostly useful for checking other tools rather than for practical weighing — four decimal places of a pound is 45 milligrams, which no bathroom or kitchen scale can distinguish. The control changes every table at once, so a printed sheet stays internally consistent.

Printing

The page carries print styles that hide the controls, navigation and surrounding interface so the tables occupy the paper rather than competing with the site around them. What comes out of the printer is the reference material. Table borders are preserved so the columns stay legible in monochrome, which is how most people print.

Getting the data elsewhere

The CSV download contains every chart in one file, with plain numbers and no thousands separators so a spreadsheet imports them as numeric data rather than text. That is the quickest route to a customised reference — import, delete the rows you do not need, and print. For a genuinely custom range and step, the Table Generator linked below builds one directly.

Why these five conversions

Because they cover the everyday cases: metric-to-imperial body weight in both directions, UK body weight in stones, and cooking in both directions. Those account for the overwhelming majority of weight conversions anyone performs. The other seventy-odd converters in this cluster handle the specialist cases individually, and the generator covers any pairing not represented here.

Accuracy and limits

Exact constants, exact decimal arithmetic, one rounding per value at the precision you choose. The charts are reference material rather than a substitute for converting a specific value — a chart shows the nearest listed rows, and where a figure falls between them the individual converter gives the exact answer.

What a printed chart is actually for

Speed and availability rather than precision. Someone converting a recipe does not need eight significant figures; they need to see that 250 g is about 8.8 oz without stopping to type anything. A chart also shows neighbouring values, which answers the question people usually have — is this closer to eight ounces or nine — that a single converted figure does not. The precision is in the individual converters; the usefulness of a chart is in its immediacy.

Reading between the rows

Where a value falls between two listed rows, interpolating linearly is exact for these conversions, because every one is a simple multiplication. Halfway between the rows for 200 g and 250 g is exactly the conversion of 225 g. That is not true of every kind of table — anything logarithmic or non-linear would need care — but weight conversion is linear throughout, so a chart can be read between its rows without introducing any error beyond the rounding already shown.

Keeping a chart current

It never goes out of date. The constants underlying every value are legal definitions that have not changed since 1959 and are not going to, so a printed chart from this page remains correct indefinitely. That is worth saying because it distinguishes a conversion chart from most reference material — there is no revision to check for, and a chart pinned up a decade ago is as accurate as one printed today.

Charts against phones

The case for paper is not nostalgia. A chart works with wet hands, in a workshop, with a phone across the room, and while someone else is using the only device. It also shows a range at a glance, which is what a cook comparing pack sizes or a shipper checking bands actually wants. The converters in this cluster are more precise and less available; a printed chart is less precise and always there, and the two complement rather than compete.

What to print for which room

A kitchen wants grams to ounces and ounces to grams, at two decimals, covering roughly 25 g to 1 kg. A bathroom or gym wants kilograms to pounds and stones, whole numbers, across a body-weight range. A workshop or postal bench wants ounces and pounds in fine steps across the band boundaries that matter. This page covers all three; the Table Generator narrows any of them to the exact range a particular room needs.

Why the constants will not change

Conversion charts are unusual reference material in that they never need revising. The pound has been exactly 0.45359237 kilograms since 1959 and the metric prefixes have been fixed since the system was drawn up, so a chart printed from this page is correct permanently. Even the 2019 redefinition of the kilogram, which replaced a physical artefact with a fixed value of the Planck constant, changed nothing here — the relationships between units are ratios, and ratios survive a redefinition of the base untouched.