Convert price per gram to price per pound, derive unit prices from a package, or compare two differently sized packages on a common weight basis.
Price Per Gram to Price Per Pound Formula
One avoirdupois pound equals 453.59237 grams; troy weights are not supported. Every mode in this calculator uses that constant to move between units.
- Total price: the amount you pay for the package.
- Weight in grams: the package weight converted to grams (1 kg = 1000 g, 1 oz = 28.3495 g, 1 lb = 453.59237 g).
- Price per gram: cost of one gram of product.
- Price per pound: cost of one pound (453.59237 g) of product.
The Unit price from a package mode takes a total price and a package weight, converts the weight to grams, and divides to get price per gram. It then multiplies by 453.59237 to get price per pound.
The Convert a known unit price mode skips the package step. If you already know a price per pound, it divides by 453.59237 to give price per gram. If you know a price per gram, it multiplies by 453.59237.
The Compare two packages mode runs the package math on two options and reports which one has the lower unit price, plus the difference per pound.
Reference Tables
Use the first table to sanity-check a result. The second table shows common package sizes converted to grams so you can spot input errors.
| Price per gram | Price per pound |
|---|---|
| $0.001 | $0.45 |
| $0.01 | $4.54 |
| $0.05 | $22.68 |
| $0.10 | $45.36 |
| $0.50 | $226.80 |
| $1.00 | $453.59 |
| $5.00 | $2,267.96 |
| Package label | Grams | Pounds |
|---|---|---|
| 1 oz | 28.35 | 0.0625 |
| 8 oz | 226.80 | 0.5 |
| 12 oz | 340.19 | 0.75 |
| 16 oz (1 lb) | 453.59 | 1 |
| 500 g | 500 | 1.102 |
| 1 kg | 1000 | 2.205 |
| 2 lb | 907.18 | 2 |
Example Problems
Example 1. A 250 g bag of coffee costs $13.50. What is the price per pound?
- Price per gram = 13.50 / 250 = $0.054/g
- Price per pound = 0.054 * 453.59237 = $24.49/lb
Example 2. Option A is $12.99 for 1 lb. Option B is $14.99 for 2 lb. Which is cheaper?
- Option A: 12.99 / 1 lb = $12.99/lb
- Option B: 14.99 / 2 lb = $7.50/lb
- Option B is cheaper by about $5.50 per pound (the unrounded difference is $5.495/lb).
FAQ
How many grams are in a pound?
453.59237 grams. The calculator uses the full value rather than rounding to 454.
Why does the price per gram show extra decimals?
Most products cost less than a dollar per gram. The display adds decimals when the rate drops below $1 or $0.01 so the number stays meaningful.
Can I mix units when comparing two options?
Yes. Option A can be in pounds and Option B in grams. Each weight is converted to grams before the comparison.
Does this calculator convert currencies?
No. Prices use dollars ($). Both compared options must use the same currency; no exchange-rate conversion is performed.
