Please note: Results are calculated from internationally defined conversion factors and are exact for the units shown. Round only at the final step, and always label the unit when you write the figure down. This tool is provided free and without warranty — see our terms of use.
On shipping weight bands, the conversion never varies. 31.75 kg in pounds is 70 lbs, and 70 lbs in kg returns 31.75 kg — the round trip closes cleanly. The converter above is free, unlimited, and works offline once the page has loaded.
The Short Version
- Works on: Phones, tablets, laptops and desktops, in any modern browser.
- Cost: Free, unlimited, no account, no app to install.
- Typical range here: 0.5 to 68 in the reference table, though the tool accepts any value you enter.
- Rounding: Two decimal places on screen, ten held behind it, so nothing drifts.
- Best for: choosing a service and similar situations
First, What Are We Converting?
Shipping prices step rather than slide, and the steps sit at different numbers in each measurement system. This chart lays out the thresholds that actually change your rate — service ceilings, handling surcharges, the parcel-to-freight boundary — converted so you can see which side of each one you are on.
A kilogram is the base unit of mass in the metric system, defined since 2019 by the Planck constant rather than a lump of platinum in a Paris vault. A pound — the avoirdupois pound used across the United States and still common in the United Kingdom — is fixed by international agreement at exactly 0.45359237 kilograms. Because both units are pinned to the same agreed definition, converting between kilograms and pounds is exact arithmetic, not an estimate.
Everything happens locally on your device. There is no account, no limit, and no record of the figures you enter.
How to Convert shipping weight bands in Seconds
If you have used a search box, you already know how this works:
- Choose your direction. Leave kg to lbs selected to turn kilograms into pounds, or switch to lbs to kg for the reverse.
- Type the figure. Type the numbers as written; the tool handles the rest. Decimals are welcome — decimals are handled at full precision.
- Press Convert. The result appears underneath with its unit label attached, so there is no guessing which number is which.
Got it wrong? Press Clear and start again. There is no penalty for a second attempt.
Real Numbers, Real Answers
Follow these through once and the tool becomes self-explanatory.
Working through 2 kg
Start with 2 kg. Multiply by 2.20462 and the answer is 4.41 lbs — about 4 pounds in round terms. In context: international small packet ceiling.
A larger case: 31.75 kg
Start with 31.75 kg. Multiply by 2.20462 and the answer is 70 lbs — about 70 pounds in round terms, or 4 st 14 lb if you think in stones. In context: 70 lbs, express per-piece ceiling.
The method never changes, only the number you feed it.
What Happens After You Press Convert
The converter is not hiding anything. Here is the arithmetic in full.
Pounds = Kilograms × 2.20462262185
Kilograms = Pounds × 0.45359237
Take 31.75 kg. Multiply by 2.20462262185 and you get 69.9968 lbs, which rounds to 70 lbs for everyday use. Reverse it: 70 lbs × 0.45359237 returns 31.75 kg. Running lbs to kg to lbs brings you back to your starting figure, which is a quick way to check you have not slipped a decimal place.
The reciprocal relationship matters: 1 ÷ 2.20462262185 = 0.45359237. If a chart gives you numbers that do not reverse cleanly, it has rounded too early.
Real-World Uses for Shipping Weight Conversion Chart
Readers tell us they use it in situations like these:
- Choosing a service. Crossing a ceiling forces a different and usually pricier product.
- Splitting consignments. Two cartons under a surcharge threshold often beat one above it.
- Rate negotiation. Knowing your typical band tells you which rates to argue about.
shipping weight bands Reference Table
Bookmark this chart if you look these values up regularly.
| Kilograms (kg) | Pounds (lbs) | Threshold meaning |
|---|---|---|
| 0.5 kg | 1.1 lbs | minimum billable weight |
| 2 kg | 4.41 lbs | international small packet ceiling |
| 10 kg | 22.05 lbs | 22.05 lbs, common band |
| 22.68 kg | 50 lbs | 50 lbs, additional handling trigger |
| 30 kg | 66.14 lbs | postal parcel maximum |
| 31.75 kg | 70 lbs | 70 lbs, express per-piece ceiling |
| 68 kg | 149.91 lbs | 150 lbs, parcel to freight |
The Rough-and-Ready Method
Halve it for the reverse trip
Going from pounds to kilograms, halve the number and add back about ten percent of the result. 100 lbs → 50, minus 10 percent → 45 kg. True answer: 45.36 kg.
Double and add a fifth
Doubling gets you to 2.0 and you need 2.2, so add a fifth of the original. 31.75 kg → 63.5 + 6.35 = 69.85 lbs against a true 70 lbs.
Handy in a conversation, risky on paperwork. Know which situation you are in.
Why This Conversion Never Changes
In 1959 six countries signed the International Yard and Pound Agreement and settled something that had been slightly untidy for centuries: exactly how heavy a pound is. The answer they agreed on was 0.45359237 kilograms, and that definition has not been touched since. It is the reason a conversion done in Sydney matches one done in Chicago.
The kilogram itself has had a more eventful time. From 1889 it was defined by a platinum-iridium cylinder kept near Paris, which meant the world's unit of mass was a physical object that could in principle be scratched. In 2019 that changed: the kilogram is now defined through the Planck constant, a fixed number of nature rather than a lump of metal in a safe.
None of this changes the arithmetic you use for shipping weight bands, and that is rather the point. A well-chosen definition is one you never have to think about. Multiply by 2.20462262185, or by 0.45359237 going the other way, and the standards infrastructure behind those digits does its work quietly.
The Many Ways People Write This Conversion
A quick detour into wording, because people arrive at this page having typed a remarkable variety of things into a search box.
You will see it as kg to lbs, kgs into lbs, kg into lbs, kg in pounds and kg into pounds. Some people write kilo lb or kilogram lbs; others write lb kilogram or simply ask how many kg in a lb. Every one of those describes the same operation: multiply by 2.20462262185 going one way, or by 0.45359237 coming back.
The abbreviations themselves have odd histories. The lb comes from the Latin libra, which is why a word with no letter b is shortened to one that has. Kg is straightforward by comparison: k for kilo, meaning a thousand, and g for gram. Neither abbreviation takes a full stop in modern usage, and neither changes in the plural, although lbs is so widely used that objecting to it is a losing battle.
The practical takeaway: pound and kilogram are the two units, everything else is shorthand, and the converter above accepts your number regardless of what you called the operation on your way here.
Reverse Reference: Pounds into Kilograms
For anyone converting the other way, here are the matching values.
| Pounds (lbs) | Kilograms (kg) |
|---|---|
| 1 lbs | 0.45 kg |
| 5 lbs | 2.27 kg |
| 10 lbs | 4.54 kg |
| 25 lbs | 11.34 kg |
| 50 lbs | 22.68 kg |
| 100 lbs | 45.36 kg |
| 150 lbs | 68.04 kg |
| 200 lbs | 90.72 kg |
| 250 lbs | 113.4 kg |
Where People Usually Slip Up
Knowing what usually goes wrong is half the battle:
- Mixing up mass and force: Pounds and kilograms both describe mass in everyday use. Pound-force is a different quantity. Unless you are doing engineering statics, you want the avoirdupois pound.
- Rounding too early: Round once, at the end. Rounding at every intermediate step is how a clean calculation quietly becomes a wrong one.
- Reading a comma as a decimal point: Much of Europe writes 2,5 kg where the UK and US write 2.5 kg. Copying a figure across that boundary without checking is a classic import-paperwork error.
- Confusing pounds with stones: Fourteen pounds make a stone. A reader who reads 11 st 4 lb as 11.4 lb is out by a factor of fourteen, which is a memorable kind of wrong.
- Assuming a US pound differs from a UK pound: It does not. Since 1959 both are exactly 0.45359237 kg. The confusion usually comes from tons, gallons or fluid ounces, which genuinely do differ.
- Multiplying when you should divide: It is the single most common error, and it is off by a factor of nearly five. If your answer looks too big, you probably multiplied a pound figure by 2.20462 instead of by 0.453592.
Precision in Practice
Carriers round upward in their own increments regardless of what you calculate, so extra decimals in your own figure buy you nothing at the invoice stage. Where precision genuinely counts is in the unit weight that gets multiplied across a whole consignment.
The general rule is to carry full precision through the calculation and round once at the very end, to whatever your context genuinely needs. Rounding an input, then rounding an intermediate step, then rounding the answer is how three small and individually defensible decisions add up to a number that is simply wrong.
Two decimals is usually plenty
For almost everything on this page, two decimal places answers the question. 31.75 kg shows as 70 lbs, and the digits beyond that describe a quantity too small to weigh on any equipment you are likely to be using.
When to keep more
Bulk quantities, repeated multiplications and anything that feeds a further calculation all deserve full precision until the last step. The error from early rounding does not stay put — it scales with everything you multiply it by afterwards.
The Truth About Decimal Places
On screen the converter shows two decimal places, because that is what people read comfortably. Behind the display it keeps ten, so if you convert kg into lbs and immediately convert back, you land on your original figure rather than something slightly adrift.
The round-trip test is the fastest way to judge any converter. Convert, convert back, and see whether you land where you started.
The pound is defined as exactly 0.45359237 kilograms. Not approximately — exactly. That means every conversion on this page is a pure multiplication with no measurement uncertainty of its own. Any error in your final figure comes from the number you typed in, not from the maths.
Where Conversion Errors Actually Cost Money
In shipping, a unit error rarely announces itself. It surfaces weeks later as a carrier adjustment, a customs query or a reconciliation that will not balance, by which point tracing it back to a single mistyped field is genuinely difficult.
The defence is architectural rather than arithmetical: store one canonical unit throughout your systems, convert only for display, and validate at the point of entry. A field that accepts any number without knowing its unit is a field that will eventually receive the wrong one.
Reconciling your own figures against the carrier's reweigh data periodically is the other half of the discipline. Systematic discrepancies point at a data problem; random ones usually point at packaging variation, and the two need entirely different fixes.
The Readers We Wrote This For
This page is for anyone who needs shipping weight bands worked out properly rather than estimated. No background is assumed: every field is labelled in plain words and every result carries its unit.
How We Check Our Numbers
The conversion factor used here is not our invention. It comes from the International Yard and Pound Agreement of 1959, which fixed the international avoirdupois pound at exactly 0.45359237 kilograms, and it is the same value published by the National Institute of Standards and Technology and the International Bureau of Weights and Measures.
The kg to lbs values in our tables are computed, not copied, so we do not inherit rounding decisions made by somebody else's chart.
Pages are reviewed on a rolling schedule and the modified date at the top reflects the last substantive check. If you spot something that looks wrong, tell us and we will investigate it rather than leave it.
Key Takeaways
- kg to lbs is one multiplication by 2.20462262185, which turns 31.75 kg into 70 lbs.
- Pounds to kilograms uses 0.45359237, an exact defined value rather than a measurement.
- No calculator? Doubling and adding ten percent gets you within about half a percent.
- Context here: Crossing a ceiling forces a different and usually pricier product.
- Check your work by converting the answer back. Running kg to lbs and then lbs to kg should return your original number exactly.
- Keep full precision until the last step, then round to whatever your situation actually needs.
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If your exact wording is not on the list, the answer is still the same: multiply kilograms by 2.20462, or pounds by 0.453592.
A kg to lbs Cheat Sheet
For readers who arrived wanting the raw kg to lbs numbers rather than the background on shipping weight bands, this section is for you.
| Value | As kg to lbs | As lbs to kg |
|---|---|---|
| 1 kg | 2.2 lbs | 0.45 kg |
| 2 kg | 4.41 lbs | 0.91 kg |
| 5 kg | 11.02 lbs | 2.27 kg |
| 10 kg | 22.05 lbs | 4.54 kg |
| 20 kg | 44.09 lbs | 9.07 kg |
| 25 kg | 55.12 lbs | 11.34 kg |
| 50 kg | 110.23 lbs | 22.68 kg |
| 75 kg | 165.35 lbs | 34.02 kg |
| 100 kg | 220.46 lbs | 45.36 kg |
The middle column applies the kg to lbs factor of 2.20462; the right-hand column applies 0.453592 instead. If your answer moved the wrong way, you used the wrong column.
Where precision counts, use the converter at the top of the page rather than a remembered kg to lbs approximation. Where it does not, the shortcut saves you reaching for a phone.
Shipping Weight Conversion Chart: Common Questions
Scan the headings; the answers are kept brief on purpose.
What is the maximum parcel weight?
Typically 31.75 kg (70 lbs) per piece on express services and 30 kg for most international postal parcels. Above roughly 68 kg total, shipments move to freight.
What triggers an additional handling surcharge?
Commonly a single piece above 22.68 kg (50 lbs), or excessive length or girth. Thresholds are carrier-specific.
Why is there a minimum billable weight?
Because handling cost is largely fixed regardless of how light an item is. Most services set a floor around 0.5 kg.
What is 0.5 kg in lbs?
0.5 kg equals 1.1 lbs. Multiply the kilogram figure by 2.20462 to get there. In context, that is minimum billable weight.
What is 2 kg in lbs?
2 kg equals 4.41 lbs. Multiply the kilogram figure by 2.20462 to get there. In context, that is international small packet ceiling.
What is 10 kg in lbs?
10 kg equals 22.05 lbs. Multiply the kilogram figure by 2.20462 to get there. In context, that is 22.05 lbs, common band.
What is 22.68 kg in lbs?
22.68 kg equals 50 lbs. Multiply the kilogram figure by 2.20462 to get there. In context, that is 50 lbs, additional handling trigger.
What is 30 kg in lbs?
30 kg equals 66.14 lbs. Multiply the kilogram figure by 2.20462 to get there. In context, that is postal parcel maximum.
What is 70 lbs in kg?
70 lbs comes to 31.75 kg. Multiply pounds by 0.453592 for the reverse direction — that is the same as saying one pound in kg is 0.453592.
How do I convert to stones as well?
Get your pounds figure first, then divide by 14. The whole number is stones and the remainder is the leftover pounds.
Does rounding matter?
It depends on scale. Two decimal places is more than enough for a suitcase. For a tonne of freight, rounding the factor rather than the answer can shift the result by several pounds.
Is this converter free?
Yes, completely. No account, no trial, no limit on how many conversions you run. The page costs you nothing and asks you for nothing.
Is there a limit on how many times I can use it?
None. Use it once or a hundred times a day; nothing is counted and nothing is throttled.
Does the pound differ between countries?
Not the avoirdupois pound. Since 1959 the US, UK, Canada, Australia, New Zealand and South Africa have all used exactly 0.45359237 kg. Tons and gallons are a different story.
What is 1 lb in kg?
Exactly 0.45359237 kilograms. That figure is a definition rather than a measurement, which is why it never changes.
Can I use these figures for work?
The arithmetic is exact and suitable for general professional use. For anything with regulatory, legal or safety weight, follow whatever verification your role requires.
Can I convert in both directions?
Yes. The radio buttons above the input switch between kg to lbs and lbs to kg. The rest of the form stays the same.
Can I use it on a phone?
Yes. The layout adapts to small screens and the calculator works the same on a phone as on a desktop.
Why is the kilogram the only base unit with a prefix?
A historical accident. The gram was originally the base unit, but it proved too small to be practical, so the kilogram was adopted while keeping the name.
Are lbs and lb both correct?
Both are used and both are understood. Strictly, lb is the abbreviation and lbs adds an English plural to it, but lbs is completely standard in everyday writing.
Does the tool store the numbers I enter?
It does not. The calculation happens in your own browser and nothing is transmitted or saved. Close the tab and the figures are gone.
Can I convert a negative number?
Mass cannot be negative, so the tool asks for a positive figure. If you are working with a difference or a change, convert the magnitude and apply the sign yourself.
Why do some countries use kg and others lbs?
History rather than logic. The metric system spread through legislation and trade from the 1790s; countries that industrialised earlier under imperial units kept them in everyday life.
How accurate is the conversion?
As accurate as the definition allows. A pound is exactly 0.45359237 kg by international agreement, so the only error possible is in the number you type.
Where does the conversion factor come from?
The International Yard and Pound Agreement of 1959, which fixed the pound at exactly 0.45359237 kilograms across the English-speaking world.
What is a metric tonne in pounds?
2204.62 lbs. Note that it is not the same as a US short ton, which is 2000 lbs, or a UK long ton at 2240 lbs.
Does gravity change the conversion?
Not the conversion. Kilograms to pounds is a fixed ratio between two units of mass. Gravity affects what a scale measures, not the arithmetic between units.
Can I check the tool myself?
Easily. Convert a round number one way, then convert the answer back. If you do not land on your original figure, the tool is rounding carelessly. This one returns it.
What happens if I enter something invalid?
You will get a short message asking for a valid positive number. Nothing breaks and nothing is submitted anywhere.
How many grams are in a pound?
453.59237 grams, which is the same defined figure with the decimal point moved.
Can I convert decimals?
Yes. Type 2.75 or 0.125 or anything else with a decimal point and the tool handles it normally.
How does kg to lbs apply here?
The same way it applies anywhere: multiply kilograms by 2.20462262185. Nothing about shipping weight bands changes the factor, only which figure you feed into it.
Is the kg to lbs factor different in other countries?
No. Since 1959 the pound has been exactly 0.45359237 kg everywhere it is used, so kg to lbs gives the same answer in every country.
What is the fastest way to do kg to lbs mentally?
Double the kilogram figure and add ten percent of the original. For 60 kg: 120 plus 6 gives 126 lbs, against a true 132.28 lbs. Add another ten percent of the running total to close most of the gap.
What is 15 kg in lbs?
The kg to lbs answer is 33.07 lbs. Multiply 15 by 2.20462262185, or run the kg to lbs step in reverse by multiplying 33.07 lbs by 0.45359237 to return to 15 kg.
What is 35 kg in lbs?
The kg to lbs answer is 77.16 lbs. Multiply 35 by 2.20462262185, or run the kg to lbs step in reverse by multiplying 77.16 lbs by 0.45359237 to return to 35 kg.
What is 45 kg in lbs?
The kg to lbs answer is 99.21 lbs. Multiply 45 by 2.20462262185, or run the kg to lbs step in reverse by multiplying 99.21 lbs by 0.45359237 to return to 45 kg.
What is 55 kg in lbs?
The kg to lbs answer is 121.25 lbs. Multiply 55 by 2.20462262185, or run the kg to lbs step in reverse by multiplying 121.25 lbs by 0.45359237 to return to 55 kg.
What is 65 kg in lbs?
The kg to lbs answer is 143.3 lbs. Multiply 65 by 2.20462262185, or run the kg to lbs step in reverse by multiplying 143.3 lbs by 0.45359237 to return to 65 kg.
One Last Thing
The practical summary: use the calculator for the figure, read the notes for the caveats, and label your units whenever you write a result down.
Anyone needing primary documentation for shipping weight conversion chart rather than a secondhand account will find it at the International Bureau of Weights and Measures: the International Bureau of Weights and Measures.