Convert price per gram to price per ounce or calculate unit cost from package price and weight in grams, ounces, pounds, or kilograms.
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Price Per Gram to Price Per Ounce Formula
Convert unit price mode:
Price/oz = Price/g × 28.3495
Price/g = Price/oz ÷ 28.3495
From package price mode:
Price/g = Package Price ÷ Weight in grams
- Price/g — cost of one gram in dollars
- Price/oz — cost of one ounce in dollars
- 28.3495 — grams in one avoirdupois ounce
- Package Price — total dollar cost of the package
- Weight in grams — package weight converted to grams (oz × 28.3495, lb × 453.592, kg × 1000)
The conversion uses the avoirdupois ounce (28.3495 g), which is the standard for food, retail goods, and most consumer products in the US. It is not the troy ounce (31.1035 g) used for precious metals. If you are pricing gold or silver, divide or multiply using 31.1035 instead.
Reference Tables
Quick conversion of common per-gram prices to per-ounce equivalents:
| Price per gram | Price per ounce | Price per pound |
|---|---|---|
| $0.01 | $0.28 | $4.54 |
| $0.05 | $1.42 | $22.68 |
| $0.10 | $2.83 | $45.36 |
| $0.25 | $7.09 | $113.40 |
| $0.50 | $14.17 | $226.80 |
| $1.00 | $28.35 | $453.59 |
| $5.00 | $141.75 | $2,267.96 |
Ounce types you may encounter:
| Ounce type | Grams | Used for |
|---|---|---|
| Avoirdupois (oz) | 28.3495 | Food, retail, general use |
| Troy (oz t) | 31.1035 | Gold, silver, platinum |
| Fluid (fl oz) | Volume, not weight | Liquids (do not use here) |
Worked Examples
Example 1: Per gram to per ounce. A spice costs $0.18 per gram. Multiply by 28.3495: $0.18 × 28.3495 = $5.10 per ounce.
Example 2: Per ounce to per gram. Coffee beans listed at $0.95 per ounce. Divide by 28.3495: $0.95 ÷ 28.3495 = $0.0335 per gram.
Example 3: From a package. A 250 g bag costs $7.49. Per gram: $7.49 ÷ 250 = $0.02996. Per ounce: $0.02996 × 28.3495 = $0.85 per ounce.
Why per-ounce prices look much higher. An ounce is roughly 28 times heavier than a gram, so the per-ounce price is always about 28 times the per-gram price. A small per-gram number is normal for everyday goods.
